# Questions Asked onOctober 24, 2010

1. ## Mathematics for Liberal Arts

Each round of the game costs \$1 to play. A round consists of you choosing a number from 1 to 10 and then picking a card at random from a standard deck of cards. I fyou pick a card with the number you chose, you win \$5. If you don't, you lose your dollar.

2. ## chemistry

For the reaction C3H8+5CO2=3CO2+4H2O How many grams of O2 react with 8.80grams of C3H8? I think the ans is 32.0gO2

3. ## chemistry

For the reaction C3H8+5CO2=3CO2+4H2O How many moles of c3h8 are needed to make 3.6 grams of c3h8? I think the ans is 44.8molesc3h8

4. ## algebra

While shopping, Jill spent six times as much as Nan. If they spent a total of \$112, how much did each person spend?

5. ## fiance

suppose the interest rate is 8% APR with monthly compounding. What is the present value of an annuity that pays \$90 every 6 months for 5 years?

6. ## chemistry

For the reaction C3H8+5CO2=3CO2+4H2O How many grams of co2 will be produced by buring 0.15 moles of c3h8?i thoink the ans is 16.2gco2

7. ## math

the chippa soccer association calculates its profit from gate taking match according to this formular p=5n-55 Where p is profit in rand an n is the number of people in the stadium a.calculate the profit when the number of people in the stadium is 250 b.if

8. ## college

The Everton college store paid \$1941 for order of 51 calculator's, cost the store \$57.The othe the store \$57 eadch. How many of each type of calculator was ordered?

9. ## e-commerce

I want to prepare a questionnaire for e-commerce project to find if there is a need for e-tutoring program. Please help me to find a sample of questions to the parent, student and teachers.

10. ## Chemistry

When an electron makes a transition from the n=3 to the n=2 hydrogen atom bohr orbit, the energy difference between these two orbits (3.0x10^-19 J) is given off in a photon of light. The relationship ... between the energy of a photon and its wavelength is

11. ## Statistic

I am getting problems with my calculations. For the first part of the question I got 68 when I try another calculation I got 1. One of the method used was Degree of freedom =(r-1)(c-1). TABLE 12-7 The director of transportation of a large company is

12. ## Statistic

TABLE 12-11 Parents complain that children read too few storybooks and watch too much television nowadays. A survey of 1,000 children reveals the following information on average time spent watching TV and average time spent reading storybooks Average time

13. ## Physics

The boy on the tower of height h = 10 m throws a ball a distance of x = 68 m, as shown. At what speed, in m/s, is the ball thrown?

14. ## Statistic

TABLE 12-6 The dean of a college is interested in the proportion of graduates from his college who have a job offer on graduation day. He is particularly interested in seeing if there is a difference in this proportion for accounting and economics majors.

15. ## physics

A golfer imparts a speed of 24.6 m/s to a ball, and it travels the maximum possible distance before landing on the green. The tee and the green are at the same elevation. (a) How much time does the ball spend in the air?

16. ## physics

A merry go round makes 2 revolutions every 2 s. A child is sitting 1.80 m from the center. Calculate a)The period of the merry go round b)the speed of the child in his position c) the centripetal acceleration of the child d) the net horizontal force on the

17. ## Managerial Finance & Accounting

P12-14 Strategic Capital Investment Decisions Smith Electronics manufactures portable CD players. Lillian Perez, the VP of operations at Smith Electronics, is considering a major capital investment decision. It would cost \$2,500,000 to put new, highly

18. ## Statistic

TABLE 12-3 A computer used by a 24-hour banking service is supposed to randomly assign each transaction to one of 5 memory locations. A check at the end of a day's transactions gave the counts shown in the table to each of the 5 memory locations, along

19. ## physic

golf is just as popular as it is on earth. A golfer tees off and drives the ball 4.5 times as far as he would have on earth, given the same velocities on both planets. The ball is launched at a speed of 54 m/s at an angle of 60¡ã above the horizontal.

20. ## Statistic

If we use the ÷2 method of analysis to test for the differences among 4 proportions, the degrees of freedom are equal to: A) 3 B) 4 C) 5 D) 1

21. ## physic

.Question part Points Submissions 1 ¨C/1 0/2 Total ¨C/1 ...A volleyball is spiked so that it has an initial velocity of 18 m/s directed downward at an angle of 50¡ã below the horizontal. What is the horizontal component of the ball's velocity when the

22. ## physics

The 1994 Winter Olympics included the aerials competition in skiing. In this event skiers speed down a ramp that slopes sharply upward at the end. The sharp upward slope launches them into the air, where they perform acrobatic maneuvers. In the women's

23. ## physics

A rocket is fired at a speed of 75.0 m/s from ground level, at an angle of 57.6¡ã above the horizontal. The rocket is fired toward an 11.0 m high wall, which is located 25.5 m away. The rocket attains its launch speed in a negligibly short period of

24. ## college algebra

Slopes are all around you! Take a look around where you are right now. You can calculate the slope of any object. For this assignment, find an object in your house, workplace, car, etc. and calculate its slope in inches. You will need a ruler for this

25. ## Physics

A baseball is seen to pass upward by a window 24 m above the street with a vertical speed of 8 m/s. The ball was thrown from the street. (a) What was its initial speed? (b) What altitude does it reach? (c) How long after it was thrown did it pass the

26. ## science

Ca3(PO4)2 + 2H2SO4 = 2CASO4 + Ca(H2PO4)2 How many moles of CaSO4 can be produced by the reaction of 0.39 moles of Ca3(PO4)2 with excess H2 SO4?

27. ## chemistry

for the reaction, NaOH+HCl yield H20 + NaCl how is the rule that tells us Na goes with Cl and OH with H? Why does NaCl does not dissociate

28. ## Financial

Scenario investment # 1 TA Holding is considering investing in project A, whether to invest in new product with a product life of four years. The cost of the fixed asset investment would be RM3,000,000 in total, with RM1,500,000 payable at once and the

asked by Mr Lau
29. ## chemistry

According to the following reaction, how many grams of sulfur trioxide will be formed upon the complete reaction of 21.2 grams of oxygen gas with excess sulfur dioxide? sulfur dioxide (g) + oxygen (g) sulfur trioxide (g)

30. ## Physics

A roller coaster at an amusement park has a dip that bottoms out in a vertical circle of radius r. A passenger feels the seat of the car pushing upward on her with a force equal to six times her weight as she goes through the dip. If r = 20.0 m, how fast

31. ## science

given that the energy released per fissin of Uranium-235 nucleus is 200Mev, calculate the number of fissions and amount of energy available if 50g of Uranium-235 is completely fissioned

32. ## Criminal Law

Can someone please help me. need help with a story about Murder-to-Hire. that includes:solicitation,conspiracy, criminal attempt and it must include individuals who acts as principals,accomplices,accessories before the fact and accessories after the fact.

33. ## Math

Solve for Y: 96y-432=84y+192

34. ## adult education

identify the three domains of development. Describe why it is important to consider each domain in the study of adult education?

35. ## Social St

How to write a argumentative essay on Plymouth,Massachusetts 1620 ? What can be some topics????

36. ## English

Is the following sentence correct? Please provide us with the requisite information on the product.

37. ## chemistry

to calculate Ea i solved for slope and i got -7.6111x10^3 so i did this for Ea: 7.61x10^3 x 8.314/mole= 63.3 KJ/Mol but someone told me im missing the number 2.30? that i have to mulitply (2.30)(8.314)(7.61x10^3)=? which is right?

38. ## science

state the chemical reagent that is used to demonstrate that expired air contains carbon dioxide

39. ## chemistry

Determine the ratio of cations to anions for the following ionic compounds a. potassium, a salt substance b. calcium floride, used in steel industry c. aluminum oxide, known as corundum in the crystalline form d. calcium oxide, used to remove sulfur

40. ## English

Which sentence is correct? 1) Please provide the shelf life information on the following biscuits: - or 2) Please provide the shelf life information of the following biscuits: -

41. ## 4th grade

Marty has 6 more pogs than Jen. After he gives 10 pogs to Jen, how many more pogs will Jen have than Marty?

42. ## physics

an object of 3 kg is dropped from 2m above the ground. it takes a time interval of tE to reach the ground of the earth. if it is dropped on the moon, how long does it take to reach the ground? the a dure to g on the moon is 1/6 of that on the earth.

43. ## economics

What is the present value of \$10,000 paid out at the beginning of each of the next two years using an interest rate of 10%?

44. ## US History

Need help answering this: 'During the 1890s local storekeepers protested rural free delivery by the Post Office because they feared competition from mail-order businesses that offered a greater variety of goods at lower prices. Describe the challenges

45. ## Applied statistics for business and economics

Only 0.02% of credit card holders of a company report the loss or theft of their credit cards each month. The company has 15,000 credit cards in the city of Memphis. Use the Poisson probability tables to answer the following questions. What is the

46. ## HS physics

A drawing shows a device that can be used to measure the speed of a bullet. The device consists of two rotating disks, separated by a distance of d = 0.790 m, and rotating with an angular speed of 65.0 rad/s. The bullet first passes through the left disk

47. ## physics

An electric drill starts from rest and rotates with a constant angular acceleration. After the drill has rotated through a certain angle, the magnitude of the centripetal acceleration of a point on the drill is twice the magnitude of the tangential

48. ## Engl 227

What does it mean to use a "process-oriented approach" in writing?

49. ## life science

1. Botany is the study of _________. 2. What bird is like a drink of water?

50. ## Earth science

What is a relief map?

51. ## Helth science

True or False: Laid end to end, the blood vessels in your body would circle the Earth two and a half times. 2. The _________ is made up of cardiac muscle.

52. ## physics

Question part Points Submissions 1 0/1 1/5 Total 0/1 ...If a truck traveling 38.0 km/h uniformly accelerates up to 55.0 km/h, what's its average speed in the process?

53. ## Physical science

What does a plane do when it piches?

54. ## physics

During a swing the head of a golf club is in contact with the ball for about 0.5 ms and the ball goes from zero to 69 m/s. Assuming the acceleration is constant, determine its value.

55. ## chemistry

to calculate Ea i solved for slope and i got -7.6111x10^3 so i did this for Ea: 7.61x10^3 x 8.314/mole= 63.3 KJ/Mol but someone told me im missing the number 2.30? that i have to mulitply (2.30)(8.314)(7.61x10^3)=? which is right?

56. ## life/health science

What bird is like a drink of water? Giardiasis is a type of diarrhea that's also called a) beagle fever b) beaver fever c) Bieber fever * I think the last ? is a??????

57. ## Finance

Wachowicz Corporation issued 15-year, noncallable, 7.5% annual coupon bonds at their par value of \$1,000 one year ago. Today, the market interest rate on these bonds is 5.5%. What is the current price of the bonds, given that they now have 14 years to

58. ## 9th grade

What is the definition of a crossroads for trade?

59. ## Statistic

Using this TABLE 12-6 for the following questions: The dean of a college is interested in the proportion of graduates from his college who have a job offer on graduation day. He is particularly interested in seeing if there is a difference in this

60. ## college

Why do economists refer to the economy as "fully employed" even when there is measured unemployment as high as 4.5% -5% ?

61. ## Social Studies

What were the things that the Natives Americans thought the plymouths???????

62. ## Algebra ( Check +Help please)

11/w=33/w+24 Basically it's made to look like a proporiton, ratio + ratio. And I know that 33w= 11(w+24) But I don't know what to do from there could somebody explain to me? Thank you!

63. ## global studies

How does geography affect the history of a nation?

64. ## social studies

-Lyndon B. Johnson Former President Lyndon felt that the most important first step in the war against poverty is? A) full employment B) efficiency in government C) our natural defense D) private and public economics

65. ## Mathematics for Liberal Arts

Using a standar deck of 52 cards, what is the probability of drawing four cards of the same number(eg.four aces, 4 kings, four 2s, four 3s,etc?

66. ## Economics

Why might exploiting a comparative advantage increase real incomes? I just need two reasons

67. ## preap physics

what is the voloocity snd acceleration of a golfer who drves her ball from in a down the fairway in a high arching shot when the ball is at its hieghest point if its flight.

68. ## Auditing

Would a public accounting firm be held liable to a third party (creditor) who extended money because on reliance of erroneous financial statements? The specific example features a junior member of the accounting firm intentionally misrepresenting the

69. ## Physics

suppose that the net external force exerted on the car is 350 N parallel to the ground, and the mass of the car is 1800 kg. What is its acceleration?

70. ## english!!

circle the context clue that shows the menaing of the word in italic type, then write a synonym for the meaning you infer on the lines provided. ¡ö jennifer wanted to travel abroad to a foreign land._____________________ ¡ö Stop brooding! Moping and

71. ## Social St

What were some hardships that the Plymouths faced and how did the Natives help them with those issues???

72. ## math grade 10

why is a stick of gum like a sneeze?

73. ## Physics

A stone is tied to a string (length = 0.450 m) and whirled in a circle at the same constant speed in two different ways. First, the circle is horizontal and the string is nearly parallel to the ground. Next, the circle is vertical. In the vertical case the

74. ## social studies

How did geography shape Canada between 1815 and 1840?

I am currently reading Chapter 7 of "Lord of the Flies", and one of my study questions from chapter 6, I failed to find in chapter 6.. How was this a good meeting for Ralph? How does he get the attention of the meeting away from Jack? Do the boys want to

76. ## english 9th grade

What are some symbols in 'a journey to the center of the earth' by jules verne

77. ## math

Approximately how much is a 10 mile high stack of pennies worth?

78. ## precalc

find the zeros of the function: f(x)=x^3+2x^2-109x-110 I think I need to factor but everytime I do, it doesn't look right.

79. ## Social St

What did the pilgrams faced during there journey ?????

80. ## Physics

A fighter pilot dives his plane toward the ground at 345 m/s. He pulls out of the dive on a vertical circle. What is the minimum radius of the circle, so that the normal force exerted on the pilot by his seat never exceeds three times his weight?

81. ## Physics

If 2.0 J of work is done in raising 180 g apple how is it lifted? Please if you answer, do it step by step. Thanks in advance.

82. ## Physics

suppose that the net external force exerted on the car is 350 N parallel to the ground, and the mass of the car is 1800 kg. What is its acceleration?

83. ## Chemistry

5. The elements are related by properties in groups.- F? 7. In Earth's environment, hydrogen is a metal.- T? Thanks -MC

84. ## Chemistry

What is the dominant intermolecular forces for C2H5OC2H5 (diethyl ether)? Is it dispersion and polar?

85. ## Physics

A 9.5 kg monkey is hanging by one arm from a branch and is swinging on a vertical circle. As an approximation, assume a radial distance of 90 cm between the branch and the point where the monkey's mass is located. As the monkey swings through the lowest

86. ## health safety nutrition

Explain the importance of the feeding relationship between young infants and teachers and how teachers promote this

87. ## grammar

I need help identifying gerund or gerund phrase, and then what is the subject, predicate noun, direct object, object of a preposition for the following sentences: Even the clock's ticking annoyed her. Jenny tried reading for awhile

88. ## physics

A volleyball is spiked so that it has an initial velocity of 18 m/s directed downward at an angle of 50¡ã below the horizontal. What is the horizontal component of the ball's velocity when the opposing player fields the ball?

89. ## St. Andrews

An airplane traveling 1011 m above the ocean at 145 km/h is going to drop a box of supplies to shipwrecked victims below. (a) How many seconds before the plane is directly overhead should the box be dropped? 1 s (b) What is the horizontal distance between

90. ## Chemistry

Lake Vida is an enormous hypersaline lake that lies under 19 m of ice in the Dry Valleys region of Antartica. The freezing point of the water is approximately -17 C owing to the fact that it is many times as salty as typical saltwater (assume all of the

91. ## Chemistry

Lake Vida is an enormous hypersaline lake that lies under 19 m of ice in the Dry Valleys region of Antartica. The freezing point of the water is approximately -17 C owing to the fact that it is many times as salty as typical saltwater (assume all of the

92. ## physics

A rocket is fired at a speed of 75.0 m/s from ground level, at an angle of 64.7¡ã above the horizontal. The rocket is fired toward an 11.0 m high wall, which is located 25.0 m away. The rocket attains its launch speed in a negligibly short period of

93. ## 4th grade math

how can thinking about 90 tens help you with 1901-297?

94. ## ECONOMICS

Q2) Given a firm’s demand function, P = 24 - 0.5Q and the average cost function, AC = Q2 – 8Q + 36 + 3/Q, calculate the level of output Q which: a) maximizes total revenue b) maximizes profits

95. ## Spanish

How do you say she is teaching in the class room in spanish?

96. ## Economics

Why do France, USA, CHINA AND INDIA HAVE COMPARATIVE ADVVANTAGE IN TOURISM?

97. ## calculus

xe^(4x) List all the critical numbers:

98. ## Social St.

The Native Americans life in the new world????

99. ## chemistry

how quickly must a 54.7 g tennis ball travel i order to have a de Broglie wavelength that is equal to a photon of green light?

100. ## psych

Describe and compare the uses and limitations of naturalistic, laboratory, and participant observation, case studies, tests, surveys and interviews, correlational studies and experiments.

101. ## psych

Discuss ethical issues in psychology, including the use of animal subjects, confidentiality, informed consent, and the use of deception in research. Describe how psychologists' values influence their work.

102. ## psych

15. Discuss the following hypothetical pieces of research and point out the problems with the research design which prevent you from drawing the stated conclusions.  In addition, suggest at least two factors other than the one mentioned in the conclusion

103. ## physics

A large open tank is filled with water to a depth of 15 m. A spout located 10.0 m above the bottom of the tank is then opened as shown in the drawing. What is the volume flow rate from the spout? Assume that the radius of the spout is 2 cm.

104. ## math

Approximately how much is a 10 mile high stack of pennies worth?

105. ## Physics

A 9.5 kg monkey is hanging by one arm from a branch and is swinging on a vertical circle. As an approximation, assume a radial distance of 90 cm between the branch and the point where the monkey's mass is located. As the monkey swings through the lowest

106. ## physics

A bicycle wheel has a diameter of 64.2 cm and a mass of 1.79 kg. Assume that the wheel is a hoop with all of the mass concentrated on the outside radius. The bicycle is placed on a stationary stand and a resistive force of 115 N is applied tangent to the

107. ## physics

How much work did the movers do (horizontally) pushing a 180- crate 10.6 across a rough floor without acceleration, if the effective coefficient of friction was 0.50?

108. ## physics!!!!!! (The questions are actually short)

CAn an object be increasing its speed with negative acceleration-----explain why or why not give an example of when both velocity and acceleration are neg. can the magnitude of a vector ever equal or be less than one of its components? If you are riding a

109. ## physics vs. Chem

Doesnt physics seem to be harder than chem? Anyone?

110. ## Physics

A shopper in a supermarket pushes a cart with a force of 35 N directed at an angle of 52(angle sign here) downward from the horizontal. Find the work done by the shopper on the cart as the shopper moves along a 50.0 m length of aisle. Someone tell me if

111. ## geography

how thick is the bedrock in the inetrior plains and why is it so thick

112. ## AP Chemistry

What volume of 6.48 M HNO3 is required to prepare 301 mL of a 1.2 M HNO3 solution? Answer in units of mL.

113. ## Human Geography

How do I calculate the physiological density of Namibia? I can't find it!! HELP!! :)

114. ## Social St.

What were the Native Americans side of the story in 1620?

115. ## Global Issues

Hi, I have an essay that I have to write for this class and the topics is: The richer states (countries) have the responsibility to provide for the world's poorer states. And I am on the pro side of this. (Just because I thought it'd be easier to write

116. ## Social St.

what were the native americans reactions when they saw the pilgrams

117. ## Physics

A helicopter is ascending vertically with a speed of 9.00 m/s. At a height of 90 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground?

118. ## trig

suppose sin(x)=5/6, and x is in the first quadrant. Determine cos(x), sin(2x), and cos(2x).

asked by jj reddick
119. ## Physics

write on (i) Cloud chamber (ii) pressurized water reactor (iii) breeder reactor

120. ## chemistry

to calculate Ea i solved for slope and i got -7.6111x10^3 so i did this for Ea: 7.61x10^3 x 8.314/mole= 63.3 KJ/Mol but someone told me im missing the number 2.30? that i have to mulitply (2.30)(8.314)(7.61x10^3)=? which is right? to get the original -7.6

121. ## social studies

how might a change in climate bring about a change in the personality of a region?

122. ## science

what is the meaning of lysosmes. How is it used in a cell.

123. ## Economics

Can someone help me with this question..Pleaseeee!! Suppose a government moves to reduce a budget deficit. Using the long-run model of the economy developed in Chapter 3, graphically illustrate the impact of reducing a government's budget deficit by

124. ## calculus

2x*sqrt(3x^2+4)

125. ## Physics

Two people start at the same place and walk around a circular lake in opposite directions. One walks with an angular speed of 1.10 10-3 rad/s, while the other has an angular speed of 3.90 10-3 rad/s. How long will it be before they meet?

126. ## calculus

2x*sqrt(3x^2+4) Find all critical numbers:

127. ## multimeter

When an AC voltage is being measured across a 15 Ù resistor which is carrying a current of 12 amps, the selector switch should be set to the AC voltage position of

128. ## economics

economics - bobpursley, Sunday, October 24, 2010 at 12:06pm present value= 10,000/(1+i)+10000/(1+i)^2 I do not understand the answer!!!!!

129. ## math

At 9:00 pm the outside temperature was 20 celcius, by midnight the temperature had dropped x degrees. Which of the following represents the midnight temperature? 20 + x 20-x 20 20x

130. ## math

Which of the following is the complete solution for the equation (x-8) (x+6)=0 1. 8 only 2. 6 only 3. 8 and -6

131. ## chemistry class

A flask is charged with 0.124 mol of A and allowed to react to form B according to the reaction A(g) → B(g). The following data are obtained for (A) as the reaction proceeds: Time (s) 1 10 20 30 40 Moles of A 0.124 0.110 0.088 0.073 0.054 1) The average

132. ## 12th grade

A perchloric acid solution is composed of 168.75 g of perchloric acid and 81.25 mL of pure water. What is the percent by mass of the perchloric acid solution? The density of water is 1.000 g/mL. When I did this part I got 67.5% But, I am having trouble

133. ## statistics

how to test whether these samples represent populations that are different from the general population

134. ## 4th grade math

write 1, 2, 3, 4, 5, 6, 7, 8 or 9 in each box. write a number sentence that has the greatest sum _,_ _ _ + _ _ _ write a number sentence that has the least sum _,_ _ _ + _ _ _

135. ## calculus

how do you do price elasticity when you have the equation p^3 x^3=9. and x=2

my granddaughter is in the 3rd grade and she needs help in reading

137. ## question

are 5th grade students allowed to ask questions??????

138. ## MKT 421

Individual Assignment: Environmental Factors · Resources: University Library, Internet · Select an organization with which you are familiar that conducts both domestic and global marketing. · Write a 1,050- to 1,400-word paper in which you identify the

139. ## physics

As Newton showed, gravity is a force that acts along the line separating two bodies and causes the two bodies to be attracted to each other (i.e. it is a central force). In this problem, assume that the planetary orbits about the Sun are circular. a. Does

140. ## Calc

Find h'(2), given that f(2)= -3, g(2)= 4, f'(2)= -2, and g'(2)= 7 a) h(x)= 5f(x) - 4g(x) b) h(x)= f(x)g(x) c) h(x)= f(x)/g(x) d) h(x)= g(x)/1 + f(x) I have no idea how to plug these in. If someone could please show me how to go about one, I'm sure the rest

141. ## Chemistry

11. Semiconductors (metalloids) have properties of both metals and nonmetals.-T? 13. Covalent bonding occurs when electrons are transferred from one atom to another.- F? 17. Bonding involves all the electrons in an atom.- T? 20. Nonpolar bonds form when

142. ## physics

A hockey puck sliding on a frozen lake comes to rest after traveling 265 m. If its initial velocity is 4.2 m/s, what is its acceleration (assumed constant)? Answer in units of m/s2.

143. ## STAT

a given normal distribution with u=70 and o=6. a- what is the probability of a randomly drawing a sample of n=9 with a mean graeter than 32? b- what is the probability of a randomly drawing a score that falls between 20 and 35?

she is having problem with comprehension and I do help her a lot but she is still having problems with it ,on every fri, her teacher gives the class a reading test to prepare them for the fcat test . they are practices ,but they also count on her grade

145. ## Physics

A 9.5 kg monkey is hanging by one arm from a branch and is swinging on a vertical circle. As an approximation, assume a radial distance of 90 cm between the branch and the point where the monkey's mass is located. As the monkey swings through the lowest

146. ## calculus

Find the points on the curve y= (cos x)/(2 + sin x) at which the tangent is horizontal. I am not sure, but would I find the derivative first: y'= [(2 + sin x)(-sin x) - (cos x)(cos x)]/(2 + sin x)^2 But then I don't know what to do or if that is even

147. ## Ap Chemistry

A perchloric acid solution is composed of 168.75 g of perchloric acid and 81.25 mL of pure water. What is the percent by mass of the perchloric acid solution? The density of water is 1.000 g/mL. When I did this part I got 67.5% But, I am having trouble

148. ## Health Science

The __________ is made up of cardiac muscle. a) stomach b) lungs c) heart

149. ## Physics (Checking answe)

Sorry for re-posting but I need to know if I did it right, please help, I worked out the problem I just want to know if I did it right. A shopper in a supermarket pushes a cart with a force of 35 N directed at an angle of 52(angle sign here) downward from

150. ## chemistry

To what final volume should you dilute 50.5ml of a 4.75 M KI solution so that 27.5ml of the diluted solution contains 3.10g of KI

151. ## Physical Science

What does a plane do when it pitches?

152. ## Life Science

What bird is like a drink of water?

153. ## Math

How can you add 0 - 100 without using a calculator or going 1+2+3+4 and on?

154. ## Biology

What is an adrenalin receptor? For a bio project at school i have to write the gene name, the # of amino acids, the # of peptides, the tissue signal, the role, the interactions, the active site/substrate, the disease/cures/inhibitors. i've googled

155. ## Quantitative Methods

Read the “JET Copies” Case Problem on pages 678-679 of the text of the Quantitative Methods Book. Using simulation estimate the loss of revenue due to copier breakdown for one year, as follows: 1. In Excel, use a suitable method for generating the

156. ## Chemistry

Calculate the cell potential for a cell based on the reaction Cu(s) + 2Ag+(aq) -> Cu2+(aq) + 2Ag(s) when the concentrations are as follows: [Ag+]= 0.53 M, [Cu2+] = 0.9 M. (The temperature is 25◦C and E0 = 0.4624 V.) Answer in V.

157. ## english

what is the difference between direct and indirect references?

158. ## music

What is the meaning of the song maria from west side story? What is the meaning of the song sandy from grease

159. ## U.S History

Question: Although they had many new weapons, Civil war generals relied on old battlefield strategies. How might such weapons and tactics affect the outcomes of battles?

160. ## Statistics

Is there a rule to figure out if this is a true or false statement? A sample size of 900 is not large enough to conclude that the sampling distribution of p is a normal distribution, when the estimate of the population proportion is .995.

161. ## Life Science (Desperate)

What bird is like a drink of water? ***Is it a swan?***

162. ## math

Write in miles per hour. Round to the nearest tenth. 3.7 mi/min

163. ## Physics

A mechanic pushes a 3.6 multiplied by 103 kg car from rest to a speed of v, doing 4600 J of work in the process. During this time, the car moves 27.0 m. Neglecting friction between car and road, find each of the following. (a) the speed v m/s (b) the

164. ## math

2/3 of 5/6 of x = 3/4 of 4/5 of y

165. ## Chem Class

The data in the table below were obtained for the reaction: A + B → P 3 Experiments 1 (A) (M): 0.273 (B) (M): 0.763 Initial Rate (M/s): 2.83 2 (A) (M): 0.273 (B) (M): 1.526 Initial Rate (M/s): 2.83 3 (A) (M): 0.819 (B) (M): 0.763 Initial Rate (M/s):

asked by jack ross
166. ## chem

What are the IUPAC names of the following alkane. CH3CHCH3 I CH3CH2CH2CHCH2CHCH3 I CH3 i thought it was 2-methyl-4-propylheptane but aparently that is wrong. does anyone know the answer?

167. ## math

A math teacher calculates grades as follows:Grade=[2 test averages+quiz average/3] After 3 tests and 2 quizzes your test average is 83 and your quiz average is 89. You took your fourth test today and noticed that your overall average grade has dropped to

168. ## English-Article

This is for my magazine on the Hunger Games, I did an article on Sponsers which Katniss and Peeta got the most. Katniss Everdeen is the main character in this book and Peeta is a boy from her same district. Their names were drawn from this glass jar and so

169. ## eng

After a taste of the morning coffee that his wife had made, Paul asks, "Did you do something different with the coffee this morning? It tastes a little bit different." "Look," snaps his wife, "if you don't like the taste of my coffee, you can just make it

170. ## social studies

Do you think Lincoln was right to relieve McClellan of his command after the Battle of Antietam?

171. ## Math

2/3 of 5/6 of xis the same as 3/4 of 4/5 of y. What is the value of x/y as a fraction in lowest terms?

172. ## chem class

The data in the table below were obtained for the reaction: A + B → P 3 Experiments 1 (A) (M): 0.273 (B) (M): 0.763 Initial Rate (M/s): 2.83 2 (A) (M): 0.273 (B) (M): 1.526 Initial Rate (M/s): 2.83 3 (A) (M): 0.819 (B) (M): 0.763 Initial Rate (M/s):

asked by jack ross
173. ## Physics

Yep its me again... sorry for re-posting this question but I am quite desperate here and I need to have this question answered, sorry if that sounds rude. IF 2.0 J of work is done raising g apple how far is it lifted? I know W= Fd hence I divided instead

174. ## chemistry

calculate the work done when 50.0g of tin dissolves in excess acid at 1.00 atm and 25 degrees c.

175. ## English

Can you help me paraphrase the poem "A Dirge" by P.B. Shelley? Thank you very much! 1)A dirge is a song that is sung at a funeral. The poet piles one image of nature upon another to describe the grief he feels. (It is normally assumed that in this poem

176. ## U.S History

How was the war in the East different from the war in the West?

177. ## Physics

The height of a certain waterfall is 33.2 m. When the water reaches the bottom of the falls, its speed is 25.8 m/s. Neglecting air resistance, what is the speed of the water at the top of the falls?

178. ## Physics

A roller coaster (340. kg) moves from A (5.00 m above the ground) to B (28.0 m above the ground). Two nonconservative forces are present: friction does -2.00 104 J of work on the car, and a chain mechanism does +3.00 104 J of work to help the car up a long

179. ## Physics

A pitcher throws a 0.140-kg baseball, and it approaches the bat at a speed of 35.0 m/s. The bat does Wnc = 65.0 J of work on the ball in hitting it. Ignoring air resistance, determine the speed of the ball after the ball leaves the bat and is 25.0 m above

180. ## Physics

In an action-adventure movie, the hero lifts the 89-kg villain straight upward through a distance of 2.0 m in 0.47 s at a constant speed. What power does the hero produce while doing this?

181. ## Physics

For tests using a ballistocardiograph, a patient lies on a horizontal platform that is supported on jets of air. Because of the air jets, the friction impeding the horizontal motion of the platform is negligible. Each time the heart beats, blood is pushed

182. ## Physics

The lead female character in the movie Diamonds Are Forever is standing at the edge of an offshore oil rig. As she fires the gun, she is driven back over the edge and into the sea. Suppose the mass of a bullet is 0.005 kg, and its velocity is +726 m/s. Her

183. ## Physics

Adolf and Ed are wearing harnesses and are hanging from the ceiling by means of ropes attached to them. They are face to face and push off against one another. Adolf has a mass of 117 kg, and Ed has a mass of 77 kg. Following the push, Adolf swings upward

184. ## Physics

A cue ball (mass = 0.150 kg) is at rest on a frictionless pool table. The ball is hit dead center by a pool stick which applies an impulse of +1.45 N·s to the ball. The ball then slides along the table and makes an elastic head-on collision with a second

185. ## chem

Give the general formula for any dialkene; that is, a straight-chain hydrocarbon with two double bonds along the chain. (Type your answer using the format CnHn+1 for CnHn+1.) I know just alkene would be CnH2n but im not sure how to make it with the

186. ## Physics

A 0.030-kg bullet is fired straight up at a falling wooden block that has a mass of 5.0 kg. The bullet has a speed of 700 m/s when it strikes the block. The block originally was dropped from rest from the top of a building and had been falling for a time t

187. ## Physics

A two-stage rocket moves in space at a constant velocity of 4650 m/s. The two stages are then separated by a small explosive charge placed between them. Immediately after the explosion the velocity of the 1240-kg upper stage is 5640 m/s in the same

188. ## Physics

A 60.5-kg person, running horizontally with a velocity of +3.76 m/s, jumps onto a 10.4-kg sled that is initially at rest. (a) Ignoring the effects of friction during the collision, find the velocity of the sled and person as they move away. m/s (b) The

189. ## Physics

A 930 kg sports car collides into the rear end of a 2500 kg SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 2.6 m before stopping. The police officer, knowing that the coefficient of kinetic friction

190. ## phy

a 25 kg rod has a box hanging from it and is suspended from the ceiling by the string. The entire system isin equilibrium. Calculate the tesnion in the string and calculate the mass of the box

191. ## Physics

The U.S army's parachuting team, the Golden Knights, are on a routine jumping mission over a deserted beach. On a jump, a 65 kg Knight lands on the beach with a speed of 4.0 m/s, making a .20 m deep indentation in the sand. With what average force did the

192. ## history

During the Great Depression did FDR help the economy? Can't decide, since he did try

193. ## healthcare

What is the most important role or function for a health care manager in motivational theory?

194. ## 9th grade, science

How to reverse a mixture of copper sulphate and distilled water? I know its a physical change but have no clue on how to reverse it!

195. ## english

4. Which of the following sentences contains “passive voice?” (Points : 1) The airplane was wrecked by the wind. The wind wrecked the airplane. The cat chased the mouse. The bird flew after the balloon. a, b, c

196. ## chemistry

A 100.0 mL portion of 0.250 M calium nitrate solution is mixed with 400.0 mL of .100M nitric acid solution. What is the final concentration of the nitrate ion?

197. ## chemistry

50 ml of.10 M HNO3 is added to 50 ml of .2M CaCl2. Calculate amount of precipitate formed?

asked by thomas richards
198. ## college

find (FxG)(X) and (GxF)(X) when f(x)=5x^2-1 and g(x)=2/x

199. ## ap chem

What volume of 5M HF will 4g Ca react completely according to the reaction Ca+2HF-->O+CaF2+H2

asked by josh sears
200. ## Physics

Now assume that the pitcher in Part D throws a 0.145-kg baseball parallel to the ground with a speed of 32 m/s in the +x direction. The batter then hits the ball so it goes directly back to the pitcher along the same straight line. What is the ball's

201. ## algebra

find (FxG)(X) and (GxF)(X) when f(x)=5x^2-1 and g(x)=2/x

202. ## english

Can someone please show me an example of alliteration and small definition?

203. ## phsyics

A compact disk, which has a diameter of 12.0 cm, speeds up uniformly from zero to 2.50 rev/s in 2.10 s. What is the tangential acceleration of a point on the outer rim of the disk at the moment when its angular speed is the following values? (a) 2.00 rev/s

204. ## math Please check

Write an equation for a parabola with vertex(-2,4) and passing through (-1,8)? y=a(x+2)^2+4 8=a(1)+4 4=a

205. ## college

Organic chemistry question. I need help with a couple of questions on organic groups. What are some products that contain: Alkynes, Aromatic (benzene), Ethers, Aldehydes, Ketones, and Acids. I also need to know some of the harmfull effects that each one of

206. ## Science

Example of a physical change that has a colour change?

207. ## physics

A large 22 cm marble rolls from rest down an incline. Its center has a linear acceleration of 2.5 m/s^2...What is the angle of the incline? It's angular accel is 22.7 rad/s^2 (if that helps and IF I'm correct!).

208. ## Chemistry

What minimum number of moles of NH4Cl must be added to 1.0 liter of solution that is 0.10 M in Mg(NO3)2 and 1.0 M in NH3 to prevent precipitation of Mg(No3)2?

209. ## Chemistry

A mass of 0.2 kg is attached to a spring of negligible mass. I the mass executes simple harmonic motion with a period of 0.5 s, what will be the spring constant/ Can I use the following formula to solve this problem k = (4pi square x mass) / T square

210. ## english

I would then choose... The airplane was wrecked by the wind.

211. ## Physics

Two identical cars are traveling at the same speed. One is heading due east and the other due north, as the drawing show. What is true regarding the kinetic energies and momenta of the cars?

212. ## chemistry

A 100.0 mL portion of 0.250 M calium nitrate solution is mixed with 400.0 mL of .100M nitric acid solution. What is the final concentration of the nitrate ion? BOB PURSLEY PLEASE EXPLAIN MORE THOROUGHLY HOW YOU GOT THE NITRATE ION TO BE .5M

213. ## Physics

A disk with a mass of 18 kg, a diameter of 50 cm, and a thickness of 8 cm is mounted on a rough horizontal axle as shown on the left in the figure. (There is a friction force between the axle and the disk.) The disk is initially at rest. A constant force,

214. ## Physics

A 930 kg sports car collides into the rear end of a 2500 kg SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 2.6 m before stopping. The police officer, knowing that the coefficient of kinetic friction

215. ## physiscs

mass of 0.2 kg is attached to a spring of negligible mass. I the mass executes simple harmonic motion with a period of 0.5 s, what will be the spring constant/ Can I use the following formula to solve this problem k = (4pi square x mass) / T square

216. ## science

a piece of furniture that weighs 500 newtons is pushed along the ground for a distance of 10 meters then lifted 2 meters above the ground into a truck. how much work is done if the force required to push the furniture is 150 newtons?

217. ## art history

who was Unraed in midieval times

218. ## English

"Your prompt action in providing the information by tomorrow would be appreciated." Is the above sentence correct?

219. ## physics

A military helicopter on a training mission is flying horizontally at a speed of 70.0 m/s and accidentally drops a bomb (fortunately not armed) at an elevation of 320 m. You can ignore air resistance. (a) How much time is required for the bomb to reach the

220. ## Science

Are any of the bellow chemical changes reversible? If yes, then how? Mixture of Lear Nitrate and Potassium Iodide Mixture of Copper Sulphate Solution and Iron Mixture of Copper Sulphate Solution and Sodium Carbonate Mixture of Dilute Hydrochloric Acid and

221. ## chemistry

In a titration, 3.4 g of an acid (HX) requires 21.5 mL of 0.85 M NaOH(aq) for complete reaction. What is the molar mass of the acid? Answer in units of g/mol. im not really sure how to even start... but i calculated the moles of NaOH which i got to be .018

222. ## geometry

d is between ce=6x cd=4x+8 de=7 units find ce

223. ## Math

this pattern represents the square numbers 1,4,9,16,25,36 diagram to explain square numbers. pls. help

-2(x+3)=-24

225. ## Physics

Olaf is standing on a sheet of ice that covers the football stadium parking lot in Buffalo, New York; there is negligible friction between his feet and the ice. A friend throws Olaf a ball of mass 0.400 kg that is traveling horizontally at 10.4 m/s. Olaf's

226. ## physics.

A jogger runs 59 m due west, then changes direction and runs 83 m due north. What is the distance the jogger travels?

227. ## trig

prove this (1+cosx)/(1-cosx)=(1+secx)/(secx-1)

asked by jj reddick
228. ## chem-repost

I ddin't know if anybody would look far down to page to help me answer my question but this is what was said so far. Posted by rebekah on Sunday, October 24, 2010 at 4:48pm. Give the general formula for any dialkene; that is, a straight-chain hydrocarbon

229. ## Physics

Olaf is standing on a sheet of ice that covers the football stadium parking lot in Buffalo, New York; there is negligible friction between his feet and the ice. A friend throws Olaf a ball of mass 0.400 kg that is traveling horizontally at 10.4 m/s. Olaf's

230. ## physics

4. An ice skater pulls three small children, one behind the other, with masses 25kg, 31 kg and 35kg. Assume that the ice is smooth enough to be considered frictionless, determine: a) the total force applied to the train of children if they reach a speed of

231. ## math

I'm in 5th grade pls. help. Amanda has a collection of X, Y and Z. Every X is a Y. One half the Z's are Y's. There are 3 times as many Y's as X's. Amanda has 50 Z's and 40 X's. No Z is an X. How many Y's does Amanda have that are neither X's nor Z's?

232. ## Physics

A 9.5 kg monkey is hanging by one arm from a branch and is swinging on a vertical circle. As an approximation, assume a radial distance of 90 cm between the branch and the point where the monkey's mass is located. As the monkey swings through the lowest

233. ## Univesity of Phoenix

With which of the motivation theories do you agree most? With which of the theories do you agree least? Explain your position.

234. ## PHYSICS

A driver of a 7400 N car passes a sign stating "Bridge Out 30 Meters Ahead." She slams on the brakes, coming to a stop in 10 s. How much work must be done by the brakes on the car if it is to stop just in time? Neglect the weight of the driver, and assume

235. ## Stats-BOB PURSLEY Help, do you know this?

Is there a rule to figure out if this is a true or false statement? A sample size of 900 is not large enough to conclude that the sampling distribution of p is a normal distribution, when the estimate of the population proportion is .995.

236. ## Chemistry

Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4.184 C2H5OH(l) 2.46 A piece of metal at a temp of 95.0oC and a mass of 67.0 g is dropped into a beaker of water containing 100 g at a temp. of 30.0oC. If the

237. ## physics.

The x component of a certain vector is -86.0 units and the y component is +75.0 units. What is the magnitude of the vector?

238. ## College Chemistry

elements in which group form -2 ions

239. ## math

a bike shop has 8 red, 5 blue, 12 black, and 9 white bikes. write an expression that shows how many more black bikes than red bikes there are.

240. ## Physics

A 930 kg sports car collides into the rear end of a 2500 kg SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 2.6 m before stopping. The police officer, knowing that the coefficient of kinetic friction

241. ## Physics

The knot at the junction is in equilibrium under the influence of four forces acting on it. The F force acts from above on the left at an angle of with the horizontal. The 6 N force acts from above on the right at an angle of 47◦ with the horizontal. The

242. ## AP chemistry

We have an aqueous solution that contains 22% (by mass) of a hypothetical solute Z. The formula weight of the solute Z is 173 g/mol. The density of the solution is observed to be 1.4 g/mL. What is the molarity of Z in this solution? Answer in units of

243. ## chemistry

For the reation: C3H8+5 02 =3 CO2+4 H2O How many moles of C3H8 are needed to make 3.60 grams of H2O? I think the ans is 44.8molesc3h8

244. ## Cultural Anthropology

How has this social institution of Family affected the culture of "North America," of "Asia," and/or "Europe

245. ## Ochem Lab

why is it important to spot samples directly on the marks made on the TLC plate? This is for Thin Layer Chromotography. Is this important so that the solvents move directly up the plate and can be identifies easily? Thanks

246. ## help

arrange in ascending order 7/22, 2/5, 10/24 what is the prime factorization of 87750 in exponent form

247. ## lab

show me how to answer a question like this A chemical solution contains 40% grain. How much grain is in 35.5ml of a solution

248. ## economics

if ad1 and as1 are the before curves and ad2 and as2 are the after curves how is this graph set up

249. ## Chemistry

How much Ba(OH)2 is needed to neutralize 3.2 moles of H2SO4 and 4.5 moles of HCl mixed together in 755 mL of water?

250. ## English

I need to identify the gerund or gerund phrase and identify it as a subject, a predicate noun, a direct object, or an object of a preposition. Or identify the sentence as one with no gerund. I need help with the following sentences. 1. It was time for

251. ## Chemistry

Calculate the [H3O+] of the following polyprotic acid solution: 0.145 M H3C6H5O3?

252. ## Chemistry

In an excess of NH3(aq), Cu2+ ion forms a deep blue complex ion, Cu(NH3)4^2+ (Kf=5.6x10^11). Calculate the concentration of Cu2+ in a solution adding 5.0x10^-3 mol of CuSO4 to .5 L of .4 M NH3

253. ## AP Chemistry

When 23.5 moles of calcium acetate are dissolved in enough water to make 825.9 milliliters of solution, what is the molarity of acetate ions? Answer in units of M.

254. ## physics

the change of velocity of an automobile during a 5.0-s period is 20m/s in the due easterly direction. What is the magnitude and direction of its average acceleration

asked by Kevin Chen
255. ## physics

The x component of a certain vector is -86.0 units and the y component is +75.0 units. The magnitude of the vector is 114 m. What is the angle between the direction of the vector and the positive direction of x? Use the convention that positive angles are

256. ## College Chem

How many calories of energy are needed to vaporize a 20.2 g sample of liquid ethanol at its normal boiling point of 78 oC?

257. ## math

prime factorization of 87750 in exponent form how do I start with this

258. ## Mathematics for Liberal Arts

Using a standar deck of 52 cards, what is the probability of drawing four cards of the same number(eg.four aces, 4 kings, four 2s, four 3s,etc)?

259. ## astronomy

Fill in the blank: The Earth may have gained its water and volatile gases from collisions with _______ .

260. ## College Chemistry

Of KCl and NaCl, which has a higher lattice energy? What is lattice energy? Lost. Please help.

261. ## Pre-Calculus Algebra

A building is 2 ft from a 9-ft fence that surrounds the property. Worker wants to wash window in the building 13 ft from the ground. He wants to place ladder over fence so it rests against the building. He decides he should place the ladder 8 ft from the

262. ## Journalism

We are currently studying censorship. At my school, a recent incident occured, and I want your opinion of whether it qualifies as censorship. An editorial was written about an occurence at my school, which resulted in disciplinary action. One line in the

263. ## Physics

A bullet is fired horizontally from a height of 78.4m and hits the ground 2400 m away. With what velocity does the bullet leave the ground?

asked by Steve smith
264. ## History

who is the KKK?

265. ## physics

A boy standing on top of a hill throws a stone horizontally. The stone hits the ground at the foot of the hill 2.5 s later. How high is the hill ?

asked by Steve smith
266. ## social studies

why is the south in more danger from hurricanes than the Midwest or the Northeast?

267. ## science

Is Saturn's orbit more elliptical and it's tilt larger than Jupiter's?

268. ## physics

A package in an airplane moving horizontally at 150m/s is dropped when the altitude is 490m. (a) How long does it take the package to fall to the ground ? (b)How far forward from the spot over which it was dropped does the package land ? (c) What kind of

269. ## Chemistry

At 25 C, the pressure and volume of a gas are 1.2 atm and 33 L. What is the volume of the gas at STP?

270. ## statistics

The caffeine content of a cup of home-brewed coffee is a normally distributed random variable with a mean of 115 mg with a standard deviation of 20 mg. (a) What is the probability that a randomly chosen cup of home-brewed coffee will have more than 130 mg

271. ## English-Article on the Hunger Games

This is for my magazine on the Hunger Games, I did an article on Sponsers which Katniss and Peeta got the most. Katniss Everdeen is the main character in this book and Peeta is a boy from her same district. Their names were drawn from this glass jar and so

272. ## AP Physics

An object has a mass of 80 kg on earth. the acceleration of gravity on Mars is about 1/4 of the acceleration of gravity on Earth. What is the weight of the object on Mars?

273. ## 8th grade

mr. macho ate 125 hotdogs over a five day peroid each day he ate seven more hotdogs than the previous day. how many hot dogs did he eat on the first day.

274. ## chemistry class

i posted this question a few minutes ago i tried to solve it on my own can someone check if my work is okay? The data in the table below were obtained for the reaction: A + B → P 3 Experiments 1 (A) (M): 0.273 (B) (M): 0.763 Initial Rate (M/s): 2.83 2

asked by jack ross
275. ## social studies

why is the Northeast coast so crowded with cities?

276. ## social studies

Why are there so many national parks in the West?

277. ## Philosophy

Choose the pair of words/phrases among the choices that exhibits the same logical relationship as the words/phrases in the following pair. building : blueprint (Points : 1) ship : sea cake : recipe bridge : island guitar : song

278. ## chemistry

what is the difference between specific heat and heat capcacity?

279. ## Physics

A 9.5 kg monkey is hanging by one arm from a branch and is swinging on a vertical circle. As an approximation, assume a radial distance of 90 cm between the branch and the point where the monkey's mass is located. As the monkey swings through the lowest

280. ## Biology

In detail can someone please explain to me how cooking eggs makes them safe to eat in connection with enzymes Thank you

281. ## weather of Oct. 23, 2010

what is the moonrise and moonset of October 23, 2010?

282. ## government

How would you reply to a political cynic?

asked by jj reddick
283. ## 9th grade

How long was Ibn Battuta's journey from Andalusia and Morocco

henry hudson

285. ## social studies

What arguments might be made for banning or allowing drilling for oil?

286. ## 9th grade

In the odyssey, what is book 16, 17, 21, 22, and 23 about in a short summary? Also explain the conflict. Some Traits of an epic hero also. Please help!!!

287. ## AP chemistry

A solution of sodium hydroxide is standard- ized against potassium hydrogen phthalate (KHP, formula weight 204.2 g/mol). From the following data, calculate the molarity of the NaOH solution: mass of KHP 1.894 g; buret reading before titration 0.13 mL;

288. ## Biology

In detail can someone please explain to me how cooking eggs makes them safe to eat in connection with enzymes Thank you I understand that enzymes are killed because of the heat as it is a factor in destroying the enzymes activity but how does this explain

289. ## us history

True or False: The three-fifths compromise called for three fifths of a states LANDLESS CITIZENS to be counted as population.

290. ## us history

True or False: The constitution assigns responsibility for carrying out laws to the JUDICIAL branch.

291. ## chemistry

At what temperature does the rms speed of Cl2 molecules equal 401 m/s?

292. ## chemistry

Raoul Pictet, the Swiss physicist who first liquefied oxygen, attempted to liquefy hydrogen. He heated potassium formate, KCHO2, with KOH in a closed 2.50 L vessel. KCHO2(s) + KOH(s) → K2CO3(s) + H2(g) If 50.1 g of potassium formate reacts in a 2.50-L

293. ## chemistry

A sample of a breathing mixture for divers contained 34.3% helium, He; 51.7% nitrogen, N2; and 14.0% oxygen, O2 (by mass). What is the density of this mixture at 22°C and 748 mmHg?

294. ## chemistry

A mixture contained zinc sulfide, ZnS, and lead sulfide, PbS. A sample of the mixture weighing 6.12 g was reacted with an excess of hydrochloric acid. The reactions are given below. ZnS(s) + 2 HCl(aq) → ZnCl2(aq) + H2S(g) PbS(s) + 2 HCl(aq) → PbCl2(aq)

295. ## chemistry

Calculate the [H3O+] of the following polyprotic acid solution: 0.145 M H3C6H5O3?

296. ## chemistry

Glauber's salt undergoes a phase transition according to the following equation: Na2SO4*10H2O(s)--> Na2SO4*10H2O(l) DH = 74.4 kJ/mol Calculate the mass (g) of Glauber's salt (use the masses to two decimal places found in the front of your text) needed to

297. ## 5th grade

What Is The Simple Subject Of This Sentence? The Eerie, High Pitched Whistling Got Louder And Louder As We Neared The Empty House.

298. ## Chemistry

If 4.0 g of hydrogen and 10.0 g of oxygen are mixed according to the equation 2 H2 + 02 = 2 H20, which is the limiting reagent? 1. none, they are evenly mixed 2. oxygen 3. hydrogen 4. water

299. ## Early Childhood Education

Support evidence of this accustion: "relationships" promotes positive relationships among all children and adults to encourage each childs sense of individual worth and belonging as a part of a community and to foster child ability to contribute as a

300. ## geometry

How would you figure this question out? :The measures of two sides of a triangle are 8 and 11. Use an inequality to express the range of the third side, m.

301. ## Algerbra

The range of the function y=3x-2 is 1, 7, 13, 16 , and 19. Which number is in the domain of the function ?

Ready Mix Concrete Company is planning on developing new markets in a growing community. It had recently acquired large orders in three locations: downtown, at a mall, and in a suburb. The destinations and loads to be delivered are the following: Delivery

303. ## science

what is the name for (NH4)2C2H3O2

304. ## chemistry

I really really need help w/this problem I think i figured it out but i have to be sure i did it right in order to do others similar to it please help thanks Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l)

305. ## college chemistry

Use the thermochemical equations shown below to determine the enthalpy (kJ) for the reaction: H2SO3(l)=>H2S(g) + 3/2O2(g) H2SO3(l)=>H2O(l) +SO2(g) DH=62KJ SO2(g)=>S(s) + O2(g) DH=297KJ H2S(g) + 1/2O2(g)=>S(s) + H2O(l) DH=-155KJ

306. ## physics

a child on a merry go round at 1.5 m is moving ______ times faster than child at .5 m

307. ## physics

From the top of a tall building, a gun is fired. The bullet leaves the gun at a speed of 340 m/s, parallel to the ground. As the drawing shows, the bullet puts a hole in a window of another building and hits the wall that faces the window. h is 0.54 m and

308. ## chemistry

For the reation: C3H8+5 02 =3 CO2+4 H2O How many moles of C3H8 are needed to make 3.60 grams of H2O? I think the ans is 44.8molesc3h8

309. ## physics

a merry go round wheel rotates with an angular speed of 2 rad/s. consider two children on the wheel, one standing .5 m and the other 1.5 m away from the center of the wheel. the chid at 1.5 m distance is moving__________ times faster than the child at .5 m

310. ## physics

A 1600 kg car travels at a speed of 10.5 m/s. What is its kinetic energy? Assume that air resistance is negligible.

311. ## Calculus

Differentiate. y= u(a cos u + b cot u) I am not sure if this correct. I was not sure whether to leave the variables as are or where the negatives should be placed? (u)*(- a sin u - b csc^2 u) + (a cos u + b cot u)*(1)

312. ## high school

A passenger in a helicopter traveling upwards at 27 m/s accidentally drops a package out the window. If it takes 17 seconds to reach the ground, how high to the nearest meter was the helicopter when the package was dropped?

313. ## AP Physics

A stone is tied to a string (length = 0.450 m) and whirled in a circle at the same constant speed in two different ways. First, the circle is horizontal and the string is nearly parallel to the ground. Next, the circle is vertical. In the vertical case the

314. ## Chemistry

You have a .200M solution of NaCl. if you pipette 2.00 mL of the solution into a 25mL volumetric flask and dilute it to the mark, then what is the molarity of the new solution

315. ## HELP

Discuss why the media is more than juste entertainment

316. ## 6th grade

What type(s) of friction oppose the motion of a fast-moving car on a road?

317. ## biology

how is it that some Archaebacteria live in the hot springs of Yellowstone Park at temperatures as high as 73C

318. ## biology

How would you design an experiment to determine the osmolarity (amount of water) in an egg?

319. ## Physics

Hi everyone, finished all my utexas physics homework, save this last question... I don't quite why I'm not getting the right answer. Any help offered will be appreciated, it could lead me to the right answer :) P.S.---- I've already imputed the following

320. ## Physics

Hi everyone, finished all my utexas physics homework, save this last question... I don't quite why I'm not getting the right answer. Any help offered will be appreciated, it could lead me to the right answer :) P.S.---- I've already imputed the following

321. ## Statistics

In a poll of 1,004 adults, 93% indicated that restaurants and bars should refuse service to patrons who have had too much to drink. Construct the 90% confidence interval for the proportion of all adults who feel the same way.

322. ## Calc

Find h'(2), given that f(2)= -3, g(2)= 4, f'(2)= -2, and g'(2)= 7 d) h(x)= g(x)/(1 + f(x)) What would the formula be? Normally it is (f/g)'= (gf' - fg')/g^2 But in this case, it is (g/f)'

323. ## Physics

Two cars travel westward along a straight highway, one at a constant velocity of 85 km/hr, and the other at a constant velocity of 115 km/hr. a) Sketch the velocity vs. time graph for both cars and paste your sketch in the space below. b) Assuming both

324. ## pre-algebra

it takes 1 cup of liqiud fertilizer to make 7 1/2 gallons of spray. How much liquid is needed to make 80 gallons of spray?

325. ## English

Make an advertisement on medicine. All in one Tynenol. Relieves you from headache, stomach pain, chest pain, etc. Get it now. how can i make my advertisement seem more powerful?

326. ## college

HCL+NaOH=Ch3OOH+NaOH

327. ## Statistics

n a hospital 24 operating rooms were sampled. The mean noise level was 41.6 decibels and the standard deviation was 7.5. What is the 95% confidence interval of the true mean of the noise levels in the operating rooms? If possible, can you list the steps

328. ## pre-algebra

what is 6 divided by 1 5/16?

329. ## algebra

-144y/-24 simplified = 6 is this correct?

330. ## Physics

A. Use the relation 2 m m m GM g R ƒ­ to find the acceleration due to gravity on the surface of the Moon. You can use the following data: Mass of the Moon m M = 7.35 ¡Ñ 1022 kg. Radius of the Moon m R = 1.74 ¡Ñ 106 m. B. How does this value compare

331. ## chemistry

The reaction CH3- N≡C → CH3- C≡N is a first-order reaction. At 230.3°C, k = 6.29 x 10^-4 s^- 1. If [CH3 -N≡ is 1.00 x 10^-3 initially, C] [CH3-N ≡ C] is __________ after 1.000 x 10^3 s. A) 5.33 x 10^-4 B) 1.00 x 10^-6 C) 4.27 x 10^-3 D) 2.34 x

8x-5y-x=9-y

333. ## pre-algebra

simplify: (-8)(x/-2) i know that -8/-2=4, but does it come out as 4x or 4=x?

334. ## physical science

A chair lift holding a 100 kg man rises 5 meters in height in 10 second time period. Ignore the weight of the chair and related machinery and answer the following: What is the weight (force exerted by his mass) of the man, in Newtons?

335. ## Statistics

For a sample group of 22, the mean is 86 with a standard deviation of 5. What is the 90% confidence interval of the true mean of the sample? Can you please explain the steps you used to get the answer. Thanks.

336. ## pre-algebra

can I simplify -4w/4

337. ## math

Jamal is fencing a rectangular field that measures 37 ft by 27 ft. How much fencing should he buy?

338. ## Science

How are the nucleus, genetic material, chromosomes, genes, DNA, and base pairs interrelated?

339. ## LINEAR ALGEBRA

How to prove or disprove (a)if A has a zeronentryonthe diagonal then A is not invertible (b)if Ais not invertible then for every matrix B, AB is not invertible (c)if A is a nonzero 2X2 matrix such that A^2+A=0, then A is invertible

340. ## Liberal arts math

1) A lottery draws six numbers from 42 possibilities, without regard to order. What is the total number of possible results of the drawing. In the lottery from the before, what is the probability that you pick the winnin number? In the Lottery from number

341. ## Physics

For some reason I keep getting this problem wrong. Please Help! A helicopter is ascending vertically with a speed of 9.00 m/s. At a height of 90 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the

342. ## chemistry

how many grams of sodium chloride do you need to prepare 250 mL of a 5.00% sodium chloride solution?

343. ## chemistryyy

what are metallic bonds?

344. ## chemistry 101

how much energy is released when 10 g of steam at 100 degrees celsius is condensed and cooled to body temperature?

345. ## Physics

The flywheel of an old steam engine is a solid homogeneous metal disk of mass M = 114 kgand radius R = 80 cm.The engine rotates the wheel at 540 rpm. In an emergency, to bring the engine to a stop, the flywheel is disengaged from the engine and a brake pad

346. ## physics

An east-west oriented conducting bar 2.0 m long moves north at 20 m/s through a magnetic field of 0.017 T, directed downward. What is the strength and direction of the electric field generated in the bar?

347. ## English

1. I have helped an old lady carry a big bag. 2. I have helped an elderly person cross a street. 3. I helped a foreigner find a subway station. 4. I have helped an Englishman go to a police station. 5. I have helped a stranger find a bookstore. 6. I have

348. ## College Physics

A multiple loop configuration is rotating at 60 Hz in a magnetic field of 0.12 T. The coil has an area of 0.0052 m2. How many coil loops are required to produce a maximum voltage difference of 170 V?

349. ## College Physics

A mass of 0.4 kg, hanging from a spring with a spring constant of 80 N/m, is set into an up-and-down simple harmonic motion. What is the velocity of the mass when at its maximum displacement of 0.1 m?

350. ## English

1. I liked the work very much because I could help orphans who needed love. 2. I liked the work very much because I could help children who had no father and mother. 3. I liked the work very much because I could help orphans who needed care. 4. I liked the

351. ## chemistry

how many mL of the above 5.00% solution are needed to make 100 mL of physiologic saline (.90 sodium chloride)?

352. ## chemistry

How many grams of calcium nitrate, Ca(NO3)2, are needed to make 100 mL of a .5 M solution?

353. ## English

The famous words of president Bill Clinton after realizing how school uniforms would positively affect our public schools That sentence is a fragment, how can I fix it? Thanks!

354. ## Physics

what is calculus

355. ## Algebra

I'm soo confused on how to solve this prboblem. x+5/8x-3 = 11/2

356. ## English

Neither the Senator nor the Representative could defent their position

357. ## Statistics

find the 90% confidence interval for the variance and standard deviation of a sample of 16 and a standard deviation of 2.1 Assume the variable is normally distributed.

358. ## Geometry

Please write a paragraph proof for this statement. 30: Point Y is the midpoint of segment XZ. Z is the midpoint of segment YW. PRove that segment or line XY is congruent to segment or line ZW.

359. ## college

How can American consumers influence decision makers on fiscal policies? Explain and discuss if and how this has changed over the past 5 years. Post your response on the Discussion Board. Comment on other postings.

asked by Sabrina Candler
360. ## college

I need help on how to figure out what is the tax rate for 5.8% on 107,700.00 for social security

asked by norma casarez
361. ## Geometry

Please write a paragraph proof for this statement. Point Y is the midpoint of segment XZ. Z is the midpoint of segment YW. PRove that segment or line XY is congruent to segment or line ZW.

362. ## Algebra

I need help. 6/x-3 + 2x/x^2-9 = 1/x+3

363. ## English

What patriotism means to me? any good ideas on what to say?

364. ## college english

I need help figuring out what this poem means. Thanks Analysis of a Sound in the Middle of the Night by Nicole Brossard time free-falling in my arms, I await night the midpoint of midnight life stretches out palm tree silence unrecognizable in the folds of

365. ## french

Does this make sense? Is there anything I should change to make it betetr, or sentences to add to it? Thank-you very much! Bonjour! Je m’appelle Kiki et je suis la fille de votre cousine, Viv! J’habite en Nouvelle Zélande et j’apprends le français

366. ## chem

I need to know how to write an equation showing how a buffer containing ammonia and ammonium chloride neutralizes added acid of HNO3.

367. ## Chemistry (geometric)

Calculate the number of cations anions, and formula units per cell unit of the following : rock-salt structure, and flourite....I have no idea how to do the second one but for the first one I got 13, 14, and 13.5 respectively. Also, what are the

368. ## English

1.When Miss Darcy arriveed, everyone had gone home 2 What were the names of the men on the committee?

369. ## Calc

If f(x)= sec x, find f"(Pi/4) I am not sure how to take the 2nd derivative? f'(x)= sec x tan x f"(x)=??? Is it f"(x)= (sec x tan x)(sec^2x)??? Please Help!

370. ## algebra

Describe two laws of exponents and provide an example illustrating each law. Explain how to simplify your expression. How do the laws work with rational exponents? Provide the class with a third expression to simplify that includes rational (fractional)

371. ## CHEMISTRY

really really need help w/this problem I think i figured it out but i have to be sure i did it right in order to do others similar to it please help thanks Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l)

372. ## geomertyy .

when all four strings are parallel the the pole, how can you be sure the pole is vertical .

373. ## Chemistry

How do you work this one problem? Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4.184 C2H5OH(l) 2.46 Using the above table, determine the final temperature if 713.6J is released from a 48.2g sample of

374. ## trig

suppose sin(x)=4/5 and cos(y)=-12/13, and x and y are in the second quadrant. determine the value of each expression: sin(x+y), cos(x-y), cos2x, sin2y.

asked by jj reddick
375. ## chemistry

how in the world do you do this problem? Use the thermochemical equations shown below to determine the enthalpy (kJ) for the reaction: H2SO3(l)=>H2S(g) + 3/2O2(g) H2SO3(l)=>H2O(l) +SO2(g) DH=62KJ SO2(g)=>S(s) + O2(g) DH=297KJ H2S(g) +1/2O2(g)=>S(s) +

376. ## physics

A blue puck with a mass of 3.90×10−2 , sliding with a speed of 0.170 on a frictionless, horizontal air table, makes a perfectly elastic, head-on collision with a red puck with mass , initially at rest. After the collision, the velocity of the blue puck

377. ## chemistry

Calculate the change in internal energy for a system that absorbs 242 J of heat and does 193 J of work on the surroundings...

378. ## chem

What would happen to the specific heat if some of the warm metal shot were lost during the transfer to the calorimeter? Answer a. It would not affect the calculated value of specific heat b. It would cause the calculated value of specific heat to be

379. ## phsics

A block is at rest on an inclined plane whose elevation can be varied. The coefficient of static friction is μs= 0.4, and the coefficient of kinetic friction is μk = 0.16. The angle of elevation θ is increased slowly from the horizontal. At what value

380. ## Physics

The record number of boat lifts, including the boat and its ten crew members was achieved by Sami Heinonen and Juha Räsänen of Sweden in 2000. They lifted a total mass of 653.2 kg approximately 4 in. off the ground a total of 24 times. Estimate the total

asked by Britney Spears
381. ## chemistry URGENT!

Many analytical instruments require liquid nitrogen. While filling an instrument with liquid nitrogen, an analytical chemist slips and spills the contents of the dewer, 25L, onto the floor. Since the boiling point of liquid nitrogen at 1atm is 77.4 K, all