# Questions Asked onOctober 11, 2012

1. ## math

write the ratio 34 miles to 2 gallons in the simplest terms.

2. ## Chemistry

The molar enthalpy of combustion of glucose is -2803 kJ. A mass of 1.000 g glucose is combusted in a bomb calorimeter. If the calorimeter contains 875 g H2O and the bomb has a heat capacity of 457 J/C, what is the temperature increase of the bomb

3. ## literary

what does the three column house icon mean in language arts

4. ## Chemistry

The molar enthalpy of combustion of glucose is -2803 kJ. A mass of 1.000 g glucose is combusted in a bomb calorimeter. If the calorimeter contains 875 g H2O and the bomb has a heat capacity of 457 J/C, what is the temperature increase of the bomb

5. ## chemistry ------ flame test-------------

Did the nitrate ion effect the color emission of the solution ? how did you decide ? my answer: No , because The nitrate ion is the oxidizing agent in the compound without it you could not burn the chemicals and you could not produce a spectrum so there

6. ## math

18/x for x = 0.12 answer ?

7. ## math

10.8/x for x = 0.03

8. ## Physics

A 60kg skier starts from rest at a height of 20m above the end of a ski-jump and leaves the ramp at an angle of 28 degrees. Neglet air resistance and assume the ramp is frictionless. A) What is the max height (h) of his jump above the end of the ramp B)If

9. ## math

9.18/x for x =-1.2

10. ## Chemistry

The molar enthalpy of combustion of glucose is -2803 kJ. A mass of 1.000 g glucose is combusted in a bomb calorimeter. If the calorimeter contains 875 g H2O and the bomb has a heat capacity of 457 J/C, what is the temperature increase of the bomb

11. ## Math

If f(x)=ax^2+b f(-3)=-3 and f'(-3)=2 find the coefficients a and b.

12. ## CIS

Draw a flowchart or write pseudocode to represent the logic of a program that allows the user to enter a value. The program multiplies the value by 10 and outputs the result.

13. ## chemistry ------------ chemistry -------

when you were heating milk on the stoven you accidentally spilled some milk on the burner . what color would you see ? why would you see that color? My answer : Intense yellow . because milk has sodium , sodium is intense yellow . is this right ?

14. ## chemistry ---------chemistry

What color did your glass -stirring rod emid ? what does this indicate about glass- strirring rod ? Ans: galss stirring rod emids orange . but i don't know the ans 2 .

15. ## Chem Hmwrk

For the reaction HCl + AgNO3 → ,write the balanced formula equation

16. ## chemistry -------------chemistry

If a flame on the candle burns red , how does energy of that flame compare to that of the Bunsen burner flame ? and why ? ans:The Bunsen burner flame has higher temperature than candle’s flame . Because flame of candle emit red ,and red has the least

17. ## Chem Hmwrk

Iodine can be prepared by bubbling chlorine gas through an aqueous solution of sodium iodide: 2NaI(aq) + Cl2(g) → I2(s) + 2NaCl(aq) How many grams of sodium iodide are required to produce 98 g of iodine?

18. ## Chem- Percent Yield

When HgO is heated, it decomposes into elemental mercury and diatomic oxygen gas. If 42.9 g of Hg is obtained from 70.1 g of the mercuric oxide, what is the percent yield of the reaction?

19. ## math-algebra 2

What are the solutions of the quadratic equation? 2x2 – 16x + 32 = 0

20. ## science

How would I use the particle theory of matter to explain air having mass? I can't figure out a way to put it into words

21. ## Chemistry

The amount of energy released by burning a fuel source, measured in energy per mass, is called the fuel value. If all the energy obtained from burning 1.30 pounds of methane (fuel value is 11.97 kcal/g) is used to heat 122.0 kg of water at an initial

22. ## US and Global Economics

(This homework question was removed due to a copyright claim submitted by K12 Inc.) Please help?

23. ## Physics

A 67-kg man standing on a scale in an elevator notes that as the elevator rises, the scale reads 840 N. What is the acceleration of the elevator?

24. ## child day care

1. For your day care center, you'll have to develop policies to share with the parents concerning all of the following issues except A. staff vacations. B. hours of operation. C. guidance practices. D. enrollment.

25. ## Math

I don't get the first problem of my homework. We learned three lessons today, the increase, decrease, and finding the base number. But i don't know which one I should use. Please help with this problem: There are 12 girls in Mr. Cooper's class. The girls

26. ## Algebra

2n-11=m/4 n=m/-3 Solve for the variables using substitution

27. ## Chemistry

Hi I need with with a prelab calculation for a Hydrate Crystal lab and I am so confused @_@ You don't really need to solve it if you don't want to, I just need an example on how to do these problems 1) Find the mass of the water that evaporated upon

28. ## Chemistry

Silver Nitrate and Sodium carbonate has a known concentration of 0.500M. preparing 25ml of 0.500m. Calculate the mass to the nearest 0.01g.

asked by Sarah Taylor
29. ## matn

JUSTIFIES A STEP IN THE SOLUTION OF AN EQUATION 4n+(7+n)=52 4n+(n+7)=52 (4n+n)+7=52 5n+7=52 5n+7-7=52 5n=45 5n/5=45/9 n=9

30. ## math

JUSTIFIES A STEP IN THE SOLUTION OF AN EQUATION 4n+(7+n)=52 4n+(n+7)=52 (4n+n)+7=52 5n+7=52 5n+7-7=52 5n=45 5n/5=45/9 n=9

31. ## English

1. The grass grows thick in the garden. 2. The grass grows thickly in the garden. 3. The grass grows thin in the garden. 4. The grass grows thinly in the garden. (Which expressions are correct and grammatical?)

32. ## trigonometry

a flagpole 25 feet high stands on the top of a tower, which is 105 feet high. at what distance from the base of the tower will the flagpole subtend an angle of 3 degrees, 20 minutes?

33. ## c++

Your Mathematic school teacher want to use a program that can read the name and the mark of a student. Your teacher want the program to automatically find the grade of the mark and display the result(name, mark and grade). Help your teacher to develop a

34. ## Math

Find the probability that if the letters of the word "parallel" are randomly arranged that the L's will not be together. In class, I'm studying permutations and combinations. The solutions stated the no. of permutations where 3 L's are together is 6!/2!.

35. ## english

hypothetical syllogisms can have two valid and two invalid structures. The two valid structures are affirming the antecedent or modus ponens and denying the consequent or modus tollens. The two invalid structures or fallacies are denying the antecedent and

36. ## Math (Probability)

An urn A contains 6 white balls and 7 black balls. And urn B contains 8 white balls and 6 black balls. A person draws a ball at random from one of the two urns. It turns out to be black. What is probability that the ball was drawn from urn A? (A) 7/14 (B)

37. ## Math (Probability)

An urn A contains 6 white balls and 7 black balls. And urn B contains 8 white balls and 6 black balls. A person draws a ball at random from one of the two urns. It turns out to be black. What is probability that the ball was drawn from urn A? (A) 7/14 (B)

38. ## Mathematics

Solution of middle terms expansion of (2x^2+1/x)^9

39. ## Maths Percentage (6th Grade)

David has \$5 in his wallet. This was 10% of the amount that he received from his mother. Find the total amount of money that David received from his mother. 35% of the number of books Ibrahim owns are fiction boos, find: a.) the total number of books he

40. ## math

Please solve this word problem, It will take at least 360 points for Kiko"s team to win the math contest. The scores are 94,82, and 87, but one of Kiko's teammates lost 2 of those points for an incomplete answer. How many points must Kiko earn for her team

41. ## subject verb agreement

mike felt bad or badly after beating his best friend in a tennis match

42. ## Writing

Can you proofread this writing? I also need a good title. Theme, what comes to mind when you hear this word? When I hear this word, I think of the overall meaning or lesson of a story. In the story, “Two Kinds, by Amy Tan there were many themes that fit

43. ## Stats

Let Y be a random number between 0 and 1 produced by the idealized uniform random number generator with density curve pictured in the following figure: P(

44. ## Linear algebra

Show that the origin is the only equilibrium point of the system? X=ax+by Y=cx+dy Wherea,b,c and d are constants, with ad-bc not aqual to 0(zero) Please show me how to do this problem Please show me the work

45. ## maths

A box contains 20 balls, of which 5 are red, 5 are blue, 5 are white and 5 are green. Suppose a sample of 5 balls are chosen without replacement. a) find the probability that the sample contains balls of all the same colour (answer is 4/ 20C5, but why isnt

46. ## physics

arthur is riding a horse at a velocity of 4m/s.four seconds after,he is already traviling at a valocity of 12m/s. what is his acceleration?

47. ## statistics

7. Give and interpret the 95% confidence interval for the hours of sleep a student gets

48. ## st.bernard

arthur is riding a horse at a velocity of 4m/s.four seconds after,he is already traviling at a valocity of 12m/s. what is his acceleration?

49. ## chem

what is the mass in grams of the following 6.78 mol of NaI

50. ## math

If you run 1 mile on Monday and then double everyday how many miles will you run by friday?

51. ## science

The volume of a 500 g sealed packet is 350 cm cube . Will the packet float or sink in water if density of water is 1 g cm raised to -3 ? What will be the mass of water displaced by this packet ?

52. ## Polynomials

A rock is thrown upward at a speed of 10 metres per second. The height of the rock above the ground is given by the formula h=10t-2.0t². Where h is the height in metres above the ground and t is the time in seconds. Then what is height after 5 second?

53. ## math

A stock drops 30 points in five days. Use integers to find the new level of the stock. The stock started at 480 points. I have been using a number line to shoe division but I am stuck on this one. Any help would be great.

54. ## English Literature

What is ironic about the rioters' wish to kill Death? A.Death is the one who seeks people to kill. B.The rioters should be concerned about each other's greed. C.The rioters believe they can be successful. D. Death and the rioters are thieves. I think the

55. ## math

which property is demonstrated here? 3455*1=3455

56. ## PHYSICS

A factory worker pushes a 30.7 crate a distance of 4.0 along a level floor at constant velocity by pushing downward at an angle of 31 below the horizontal. The coefficient of kinetic friction between the crate and floor is 0.26. What magnitude of force

57. ## Chemistry

How do you do this problem? Calcuate the mass of CuCl2*5H2O required for preparing 400mL solution that of .25M in chloride ions.

58. ## Stats

Calculate the expected value and standard deviation of X, the number of on the job accidents: Accidents 0,1 2 Probability .5, ?, .2 P(X=1) = E(x) = µx = Standard deviation =

59. ## physics

The maximum speed of a child on a swing is 4.90 m/s. The child's height above the ground is 0.525 m at the lowest point in his motion. How high above the ground is he at his highest point?

60. ## physics

Prove that for an earth satellite,the ratio of its velocity at apogee to its velocity at perigee is the inverse ratio of its distances from apogee and perigee.

61. ## LATIN

Filio meo multi amici erunt I have trouble understanding what this means exactly. This is all I have as a literal translation My brother many friends there are/ they are

62. ## chemistry

what is the chemical name and lewis structure of NO3 -2

63. ## physics

A 800. kg car starts from rest and accelerates uniformly to 19.0 m/s in 22.0 s. Assume that air resistance remains constant at 340 N during this time. Find (a) the net force on the car

64. ## Physics

Mathematically determine the resultant force if two forces A and B act on an object. Force A is 85N and is at an angle of 20• to the horizontal. Force B is 125N and is at an angle of 60• to the horizontal.

65. ## physics

A 0.70 kg block along a horizontal track has a speed of 1.10 m/s immediately before colliding with a light spring of force constant 3.50 N/m located at the end of the track. (a) What is the spring’s maximum compression if the track is frictionless?

66. ## chemistry

Calculate the number of moles of Cl atoms in 1.81×10e24 formula units of magnesium chloride,MgCl2.

67. ## LATIN

How do I say "belong to" in Latin?

68. ## science

A spy in a speed boat is being chased down a river by government officials in a faster craft. Just as the officials’ boat pulls up next to the spy’s boat, both boats reach the edge of a 5.3 m waterfall. The spy’s speed is 16 m/s and the officials’

69. ## math

How am I supposed to know where to put the decimal in the answer to,.947+.284+.034?????????????????

asked by Math Geek
70. ## math

The home economics team has 6 3/4 feet of fabric for a class project. They need 3/4 of a foot of fabric for each piece in the project. How many pieces will they be able to cut?

71. ## math

Dear Ms.Sue, Is the answer to .947+.284+.034=1.265? Oh I almost forgot THANK YOU SO MUCH!!!!

asked by Math Geek
72. ## trigonometry

verify the identity: (cosx/1+sinx) + (1+sinx/cosx) = 2secx

73. ## Chem

What is the [H3O+] of an aqueous solution having a pH of 11?

74. ## physics

An airplane of mass 1.6 x 10^4 kg is moving at 58 m/s. The pilot then revs up the engine so that the forward thrust by the air around the propeller becomes 7.0 x 10^4 N. If the force exerted by air resistance on the body of the airplane has a magnitude of

75. ## College Math

In a certain triangle the measure of one angle is triple the measure of a second angle but is 110 degrees less than the measure of the third angle. [The sum of the measures of three interior angles of a triangle is always 180 degrees.] What is the measure

asked by Richard D
76. ## Basic algebra

The length of a rectangle is 9 feet longer than twice the width. If the perimeter is 90 feet, find the length and width of the rectangle?

77. ## health

Do you think that all six dimensions of health are equally important?

asked by michelle battle
78. ## College Math

Simplify the algebraic expression 3xz + 4xy – 2yz + xy + 5yz – 9xz and evaluate it for x = 3, y = -2, z = -5. Identify the variables, constants, and coefficients in the simplified expression.

asked by Richard D
79. ## College Math

Simplify the algebraic expression 3z3 – 5x2 + 2 – 4y2 + 6x2 – 4z3 – 7y + 12 – 2x and evaluate it for x = -2, y = -3, z = -4. Identify the variables, constants, and coefficients in the simplified expression.

asked by Richard D
80. ## universsity of karachi

A graduate class consist of six students. what is the probability that exactly three of then are born in either in april or in october?

81. ## Algebra2:O

Help? Write the standard form of the equation of the circle with the given center and radius. 14. center (-2, 0) and r = 3

82. ## Algebra2

Find the center and radius of the given circle and graph it. 1. x^2+y^2+10y+21=0

83. ## Anthropology

Before colonialism, most colonized people lived in: (Points : 1) general peace and tranquility static and unchanging cultures a state of balance with nature constant warfare and violence

84. ## Algebra2

Determine if the given relation is function or not. Give its domain and range. 16. (-1, 2), (1, 3), (-1, 4), (2, 5) 17. (1, 1), (2, 2), (3, 3), (4, 4)

85. ## Algebra2

Help? Decide whether y is a function of x. 1. 5x-y=10 2.x^2+y^2=4

86. ## Economics

You have opened your own word processing service. You have already bought a special computer needed for word processing and paid \$5,000 for it. However, due to the cost changes in the computer industry, the current price of an equivalent machine is \$2,500.

87. ## Physics

A 63 kg student is standing atop a spring in an elevator that is accelerating upward at 2.5 m/s^2 . The spring constant is 2700 N/m. By how much is the spring compressed?

88. ## Anthropology

Colonizers successfully changed the colonized from subsistence activities to wage labor with: (Points : 1) rewards and incentives. taxes that had to be paid in cash. persuasion and education. mutual trust and affection

89. ## AP Chemistry

What effect would a catalyst have on the rate of reaction for the decomposition of ozone?

90. ## english 9 th

2. Choose a story element, such as the use of a symmetrical plot, a certain kind of narrator, or irony, and explain how and why it is used in one of the stories in the unit.

91. ## algebra

find the maximum or minimum of the following quadratic function: y =x2 - 10x + 25

92. ## finance

You buy an 8% annual coupon bond from CARRIS Inc. that has a 25 year maturity and a required return of 12%. The par value is \$1,000. You sell the bond five years later when the required return is 10%. What is the beginning price of the bond when it is

93. ## foreign language

Idenitiy the Phrase used in the following sentence. Staci decided to visit her aunt and uncle during the summer

94. ## Chemistry(Please check, thanks)

For C4H10O a constitutional isomer can be written as C-C-C-C-O-H with hydrogens also coming off of the 4 carbons. I know that this is an alcohol. I need to know if there are stereoisomers for this other than conformers. I think that there are stereoisomers

95. ## math

kara needs 35 for an aquarium for 6 fish. how can she pay with the least ten and one dollar bills?

96. ## Chem

Balance C3H6 + O2 > H2O + CO2

97. ## algebra

The reflection of the tree in the lake is 49 in long. If your shadow in the lake is 14 in long and you are 5 ft, how tall is the tree? Put your answer as inches.

98. ## algebra 2

-3u+7/2=-4/3u-5/4 solve for u in simplest form.

99. ## physics

a ramp is 2.8 m long and 1.2 m high. how much power is needed to push a box up a ramp in 4.6 s with a force of 96 N?

100. ## Calculus

The length of rectangle is increasing at a rate of 8cm/s and its width is increasing at a rate of 3cm/s. When the length is 20cm and the width is 10cm, how fast is the area of the rectangle increasing?

101. ## English-Ms. Sue please

hypothetical syllogisms can have two valid and two invalid structures. The two valid structures are affirming the antecedent or modus ponens and denying the consequent or modus tollens. The two invalid structures or fallacies are denying the antecedent and

102. ## cost and management accounting

Choice any company and explain the five ways of applying cost and management in company process system.

103. ## algebra 2

3/-8 * 2/7 * (-3) Its multiplying fractions, but it wants the answer in simplest form!

104. ## Chemistry

Calculate the heat capacity of a calorimeter if th ecombustion of 4.665 g of benzoic acid led to an increase in temperature of 7.148 C.

105. ## math

If there is 1/6 of a cake and Mitchell only wants 3/12 of it, how much of the cake does he want

106. ## algebra 2

Solve for x: x=4+x divided by y-3

107. ## English

what does it mean when someone says "im biased towards the colour red"?

108. ## Chem

How would we make 500mL of a 1.5 percent w/v solution of KC1 in water?

109. ## Algebra

solve by elimination: 6a+2b = -48 -6a+b = 57 What is the solution set ( , )?

110. ## Physics

How does the cochlea sense sound? •Snail shaped tube lined with receptor cells which transmits signals to the brain. Correct?

111. ## Physics

Identify the causes of conductive and sensorineural hearing loss. I have no idea. Please help.

112. ## Supertaster......

What makes a supertaster?

asked by rawr... im a dinosaur.... rawr
113. ## Chem

At constant temperature, a sample of 3.0L of Argon gas at 2.0 atm is compressed until the new pressure is 3.524 atm. What is the new volume?

114. ## Chem

In carbon monoxide poisoning the hemoglobin is incapable of transporting oxygen to the tissues. How does oxygen get delivered to the cells when the patient is put into a hyperbaric chamber?

115. ## Physics

An 52.0 N box of clothes is pulled 7.3 m up a 30.0° ramp by a force of 103 N that points along the ramp. If the coefficient of kinetic friction between the box and the ramp is 0.22, calculate the change in the box's kinetic energy.

116. ## Algebra

I cannot solve the problem please help me. I'm suppose to set the equations up to solve for t. x = y + rt + at^2/2 Even when I plug in the values I don't get the answer. x = 16.4 y= 0 r= 0*cos(45)a=0 t is suppose to equal 2.32 if I set the problem up

117. ## Physics

An 52.0 N box of clothes is pulled 7.3 m up a 30.0° ramp by a force of 103 N that points along the ramp. If the coefficient of kinetic friction between the box and the ramp is 0.22, calculate the change in the box's kinetic energy.

118. ## Chem

How would we make 500mL of a 1.5 percent w/v solution of KC1 in water?

119. ## history

The capital of the Southern Song Empire was the city of Kaifeng Beijing X'ian Hangzhou Shanghai I think its Hangzhou but any help would be greatly appreciated!

120. ## Math

A certain computer can perform 10 to the 5th power calculations per second. How many calculations can it perform in 10 seconds?

121. ## Chem

To a tank already containing N2 at 2.0 atm and O2 at 1.0 atm, we add an unknown quantity of CO2 until the total pressure is 4.6 atm. What is the partial pressure of the CO2?

122. ## science

A point object is acted upon by forces of 4N, 5N and 6N is in equilibrium. IF=f the 6N force is removed, what is the resultant force on the object now? I really want to know how tow find relationship between 3 forces, and is there anything to do with cos

123. ## history

Which of the following was a problem faced by the average Chinese citizen during the Song dynasty? the shrinking use of the civil service exam and thus the lack of opportunity to obtain a government position the control of the Chinese treasury by northern

125. ## math

I am a four digit number. My tens digit is a 0. My ones digit is an odd number that is less then my hundrads digit. If you multiply me by 5, the estimated produt is 20,000. What number am i?

126. ## math

I need to know how to write a word expression for 535 divided by 21

127. ## chem

To a tank already containing N2 at 2.0 atm and O2 at 1.0 atm, we add an unknown quantity of CO2 until the total pressure is 4.6 atm. What is the partial pressure of the CO2?

128. ## chem

Define aqueous solution.

129. ## Chemistry

If 100J are added ti 20g of water at 30degrees Celsius, what will be the final temperature of the water

asked by S. Sook
130. ## Physics

Two cars pass each other traveling at the same speed. One car has a constant velocity of 18.0 m/s east. The other car has a constant acceleration of 3.00 m/s^2, west. How much time will have elapsed until the cars are 128 m apart?

131. ## science

substance a has a boiling point of 80% C and a density of 3.5 g/cc what is it and why

132. ## Science 8R - help!!!!

if you tear a piece of material in haft, how is the density affected?

133. ## Chemistry(Urgent, please check)

For C4H10O a constitutional isomer can be written as C-C-C-C-O-H with hydrogens also coming off of the 4 carbons. I know that this is an alcohol. I need to know if there are stereoisomers for this other than conformers. I think that there are stereoisomers

134. ## science

82 liters plus 3.876 liters is what?

135. ## Chem

Ethanol, C2H6O, is very soluble in water. Describe how water dissolved ethanol.

136. ## Chem

Calculate the heat capacity of a calorimeter if th ecombustion of 4.665 g of benzoic acid led to an increase in temperature of 7.148 C

137. ## math

How can knowing the multiplication properties help you evaluate 5 * ( 20 * 63 )

138. ## Science

332 dg = how many mg?

139. ## English

Posted by rfvv on Thursday, October 11, 2012 at 3:39am. 1. The grass grows thick in the garden. 2. The grass grows thickly in the garden. 3. The grass grows thin in the garden. 4. The grass grows thinly in the garden. (Which expressions are correct and

140. ## Calculus 2

how do I find the fluid force of a vertical semicircle that has been divided into three equal sectors of 60 degrees each. I know what the equation to find the fluid force for the whole semicircle is. but how do I find L(y) for each semicircle.

141. ## chem

Ethanol, C2H6O, is very soluble in water. Describe how water dissolved ethanol.

142. ## Physical Science

What is the force of an 18kg object accelerating at 4m/a squared?

143. ## Chem

Calculate the heat capacity of a calorimeter if th ecombustion of 4.665 g of benzoic acid led to an increase in temperature of 7.148 C

144. ## geometry

if n(2,4)is reflected in the line y=2 the n`is (2,0) true or false and why

145. ## chemistry

What is the H+ concentration of a solutoin that is formed by combining 335 mL of 0.110 M HNO3 with 75 mL of 0.120 M Ba(OH)2 at 25 degrees celsius?

146. ## 7th Geo

Where did the Maori originate from? Indonesia, Malay, Polynesia, Australia. Australia, right?

asked by rawr... im a dinosaur.... rawr
147. ## physics

This is the situation I have been given: You are given three capacitors, one with a capacitance of 0.025 micro-farads, another with a capacitance of 0.05 micro farads, and the third with a capacitance of 0.015 micro-farads. Using only these capacitors,

148. ## English

I need a thesis statement for the story, "Rikki Tikki Tavi" by Rudyard Kipling. I thought about using " (In) This short story, "Rikki Tikki Tavi, by Rudyard Kipling, tells of the conflict of Rikki Tikki and two cobras, as he tries to defend Teddy."

149. ## Math

How do I add, subtract, divide, and multiply integers

150. ## Physical Science

if you tear a piece of material in haft, how is the density affected? sorry i repost it, just the title

151. ## physics

A 5.84 box sits on a ramp that is inclined at 35.2 above the horizontal. The coefficient of kinetic friction between the box and the ramp is 0.27. What horizontal force is required to move the box up the incline with a constant acceleration of 4.30 ?

152. ## calculus

A fence 8 feet tall stands on level ground and runs parallel to a tall building. If the fence is 1 foot from the building, find the shortest ladder that will extend from the ground over the fence to the wall of the building.

153. ## physics

A science student is riding on a flatcar of a train traveling along a straight, horizontal track at a constant speed of 12.8 m/s. The student throws a ball into the air along a path that he judges to make an initial angle of 67.0° with the horizontal and

154. ## Chemistry

Calculate the concentrations of all species in a 1.41 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1 = 1.4× 10–2 and Ka2 = 6.3× 10–8. Na^+ = 2.82M SO3^2- = 1.40M HSO3^- = 0.00047M H2SO3 = OH^- = H^+ = I have

155. ## Chemistry

Calculate the concentrations of all species in a 1.41 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1 = 1.4× 10–2 and Ka2 = 6.3× 10–8. Na^+ = 2.82M SO3^2- = 1.40M HSO3^- = 0.00047M H2SO3 = OH^- = H^+ = I have

156. ## math

How can knowing the multiplication properties help you evaluate 5 * ( 20 * 63 )

157. ## Physics

You will fire the spring gun 3 times from the first detent and measure the change in height of the (pendulum + ball) for each shot. Write the equation for the change in height of the first shot.

158. ## physics

derive the formula v0=sqrt((deltaX)squared)*g)/2*deltaY

159. ## Science

When a car slams on its brakes what provides friction that helps the car stop? What kind of energy is produced?

160. ## Christmas Island

I need to know more about christmas island. I have research and i not getting any info on education and interesting fact in case want to live there permanent. I know about the crabs but cant find info if they bite. please help me find info, thanks.

161. ## History

Why did slavery became a part of American culture and identity?

162. ## Physics

a 96 kg clock initially at rest on a horizontal floor requires a 605 N horizontal force to set it in motion. After the clock is in motion a horizontal force of 547 N keeps it moving with a constant velocity. the acceleration of gravity is 9.81 m/s2 find

163. ## physics

please help :/ Three charges are fixed to an xy coordinate system. A charge of +25C is on the y axis at y = +2.7 m. A charge of -16C is at the origin. Lastly, a charge of +66C is on the x axis at x = +2.7 m. Determine (a) the magnitude and (b) direction of

164. ## physics

trying to study but stuck with this one. Two tiny spheres have the same mass and carry charges of the same magnitude. The mass of each sphere is 4.62 x 10-6 kg. The gravitational force that each sphere exerts on the other is balanced by the electric force.

165. ## physics

help! Two charges A and B are fixed in place, at different distances from a certain spot. At this spot the potentials due to the two charges are equal. Charge A is 0.22 m from the spot, while charge B is 0.54 m from it. Find the ratio qB/qA of the charges.

166. ## physic

A charge of -2.73 μC is fixed in place. From a horizontal distance of 0.0465 m, a particle of mass 9.50 x 10-3 kg and charge -9.56 μC is fired with an initial speed of 97.2 m/s directly toward the fixed charge. What is the distance of closest approach?

167. ## Math

From these fractions choose ,or= to make a true statement 1. 11/212 8/24 Order the fractions from least to greatest 3/5 1/4 1/2 2/5 Answer: 1/3 2/5 1/2 3/5 6 3/4, 6 1/2, 6 5/6, 6 3/8 Answer: 3/8 1/2 3/4 5/6

168. ## Math

Ramundus is making a xylophone. So far, he has bars that are 1 3/4 feet 1 7/12 feet and 1 2/3 feet long. What is the length of the longest bar 3/4? Alana practiced dancing for 11/4 hours on Monday 19/8 hours on Wednesday and 2 3/5 hours on Friday. On which

169. ## Physical Science

After a sled has passed several times over a snowy path on a hill, the grass or dirt under the snow may begin to show through where the sled has traveled. Why?

170. ## Enviromental Science

What effect could an uncontrollable grass carp population have on the energy pyramid of an lake environment?

171. ## physics

A 800. kg car starts from rest and accelerates uniformly to 19.0 m/s in 22.0 s. Assume that air resistance remains constant at 340 N during this time. Find (b) the average power developed by the engine

172. ## physics

block A (mass 2.04kg) rests on a tabletop. It is connected by a horizontal cord passing over a light, frictionless pulley to a hanging block B (mass 3.00kg ). The coefficient of kinetic friction between block A and the tabletop is 0.215. After the blocks

173. ## physics

A 5.84kg box sits on a ramp that is inclined at 35.2degrees above the horizontal. The coefficient of kinetic friction between the box and the ramp is 0.27. What horizontal force is required to move the box up the incline with a constant acceleration of

174. ## books

Would this make a good Jane Eyre theme statement? "Every person searches for love & home, but only few find it." If not, how can I change it? I need help!

175. ## physics

determine the tension in each cable below. draw a force diagram for the system before solving the problem. Case A- ball suspended on one cable Case B- ball suspended on by two cables

176. ## Math

Which of the following statements is true? A. 1/2>3/4 B.1/27/8 D.3/8

177. ## English

Posted by rfvv on Thursday, October 11, 2012 at 3:39am. 1. The grass grows thick in the garden. 2. The grass grows thickly in the garden. 3. The grass grows thin in the garden. 4. The grass grows thinly in the garden. (Which expressions are correct and

178. ## English

did anybody read The Catcher in the Rye?

179. ## Math

Rudulpho bought a set of wrenches to work on his car. He bought the following sizes 7/8 3/8 3/4 and 1/2. he wants to hang these on his garage wall in order from greatest to least. Which list shows the order in which he should have the wrenches A.7/8 3/8

180. ## Math

slope and y intercept form of these two problems? Y-5=1/3(x-9) 2y+6a-4x=0

181. ## math

James is 15 years older than Sue. In 12 years James will twice Sue's age. How old are James and Sue?

182. ## science

A sample containing .347 moles of an element has a mass of 39.00 g. What is the element?

183. ## Math

Arlene plants to sew a patchwork quilt. She purchases different prints, colors, and lengths of fabric for the quilt. She bought the following lengths 3/4 5/8 3/8 1/2. She wants to stack them in order from least to greatest. Which list shows the order which

184. ## math

Katrina is having new curtains made for a window in her room. she needs 1.56m of fabric. fabric is sold lengths of whole metres and tenths of metres. how much fabric should she buy? why?

185. ## early childhood education

at what age does exercise begin to result in strength in boys and girls?

186. ## Physics

A swimmer can swim in still water at a speed of 9.31 m/s. He intends to swim directly across a river that has a downstream current of 4.35 m/s. a) How many degrees from straight across the river should he head? Let upstream be a positive angle. Answer in

187. ## chemistry

an oxygen storage tank contains 12l at 25 degrees C and 3 atm.After a 4 L canister of oxygen at 25 degrees C and 3atm is emptied into the ,what do you expect the temperature of the tank to be

188. ## Math

Hudson is already 40 miles away from home on his drive back to college. He is driving 65 mi/hr. Write an equation that models the total distance d travelled after hours h. What is the graph of the equation. When Phil started his new job, he owed the

189. ## Math

Barone’s Italian Restaurant advertises that its customers are much happier than the customers of its main competitors. The claim is based on the results of a customer satisfaction survey Which statement best describes why the graph is misleading?

190. ## physics

You drop a ball from a height of 1.9m , and it bounces back to a height of 1.3m . a)What fraction of its initial energy is lost during the bounce? b)What is the ball's speed just before the bounce?

191. ## odu

A toboggan approaches a snowy hill moving at 12.9 . The coefficients of static and kinetic friction between the snow and the toboggan are 0.390 and 0.290, respectively, and the hill slopes upward at 44.0 above the horizontal.

192. ## Math

Gretchen bought a sweater for \$23.89. In addition, she had to pay \$1.43 in sales tax. She gave the sales clerk \$30. How much change did Gretchen receive from her total purchase?

193. ## Algebra

How would you set up problem: your average rate traveling uphill was 2.2 kilometers per hour and average rate downhill was 3.3 kilometers per hour. If he spent a total of 12 hours hiking, how long was the trail?

asked by Ellen P
194. ## math

Sandy writes (4*30) + (4*2) and says the quotient for 128/4 is 8. is she correct?

195. ## Math Bar graphs

Which would be the best way to display the data—a bar graph, a histogram, or a line graph? I think a bar graph because it is more accurate. please help and tell me why you chose the one you chose.

196. ## AED/204

Assume that the cultural make up of your classroom includes at least five different ethnic and religious groups. o Address how and why you would create an atmosphere of tolerance, acceptance, and caring in your classroom environment. o Create a plan that

197. ## science

Why does the sun and moon appear to be the same size when viewed from earth.My answer is because the sun is bigger than the moon. Am I correct

198. ## .

What are 2 causes and 2 effects of the development of ancient civilizations in the Middle East.

199. ## science

X needs to find the density of a cube. Each side of the cube measures 3 cm and the mass of the cube is 12 g. What is the approximate density of the cube.

200. ## pre-cal

Let f(x) be polynomial function. Explain in your own words how to use the Rational Zero Theorem to find the real zeros of f (x).

201. ## science

Two mineral samples have the same mass. Which of the following statements is Ture? A. They don't have same density. B. They have the same volume. C. They are the same material.

202. ## physics

Suppose that a senior driving a Pontiac zooms out of a darkened tunnel at 39.4 m/s. She is momentarily blinded by the sunshine. When she recovers, she sees that she is fast overtaking a camper ahead in her lane moving at the slower speed of 12.9 m/s. She

203. ## physics

The bunny is initially hopping east at 7 m/s when it first sees the fox. Over the next half second the bunny changes its velocity to west at 12 m/s and escapes. What was the bunny's average acceleration (magnitude and direction) during this half-second

204. ## pre-cal

Find the real zeros of f (x)= 2x^3 + 2x^3 – 8x + 3

205. ## Physics

Angel Falls in southeastern Venezuela is the highest uninterrupted waterfall in the world, dropping 979 m (3212 ft). Assume that it takes 14 s for the water to fall from the lip of the falls to the river below. If the water lands 60 m from the base of the

206. ## Physics

A 21.3-g bullet is fired from a rifle. It takes 3.77 × 10-3 s for the bullet to travel the length of the barrel, and it exits the barrel with a speed of 779 m/s. Assuming that the acceleration of the bullet is constant, find the average net force exerted

207. ## college geometry

if triangle mnp approximate triangle srt with proportionality factor k, show that if ma and sb are altitudes of the given triangles, then ma = ksb in

208. ## math

Video rental Store A charges a membership fee of \$25 and \$2 for each movie rental. Video rental store b charges a membership fee of \$10 and \$2.50 for each movie. Find the number of movies rentals for which both stores' charges are the same

two blocks of masses m1 and m2 (m1>m2) are placed on a frictionless table in contact with each other. A horizontal force of magnitude F is applied to the block of mass m1. if P is the magnitude of the contact force between the blocks, what are the net

210. ## chemistry

How does the bond that forms between Na and Cl differ from a bond that forms between N and Cl?

asked by Boo Boo
211. ## physics

A rocket moves upward, starting from rest with an acceleration of 32.0 m/s2 for 3.27 s. It runs out of fuel at the end of the 3.27 s but does not stop. How high does it rise above the ground?

212. ## Math

(x-3) is a factor of x^3+ax^2+bx-3 but when divided by x+2 the remainder is 15 Solve for A and B I know that A is 1 and B is -11, but I don't understand how to solve it

213. ## MATH 6-3

DRAW A RECTANGLE 24 UNITS LONG BY 12 UNITS WIDE

214. ## math

Name a number with decimal hundredths that rounds up to the nearest whole number but down to the nearest tenth

215. ## physics

A daring stunt woman sitting on a tree limb wishes to drop vertically onto a horse galloping under the tree. The constant speed of the horse is 12.5 m/s, and the woman is initially 1.31 m above the level of the saddle. How long is she in the air? The

216. ## History

What country are these cities in? Bellman, Port-au- Prince , Tegucigalpa and Managua?

217. ## Chemistry

How many moles of H2 can be produced? (2.14 mol)

218. ## chemistry

What is the [SO42-] in 0.45 M of H2SO4?

219. ## math

name two numbers with decimal hundredth that round to the same whole number but different tenths.

220. ## Hvac

I have a series circuit with 115 Volta with r16ohmd r2 22ohms r3 44 ohms what is the wattage on r3

221. ## chemistry .....chemistry

what element include in the fireworks power ? why

222. ## Chemistry

how do you balance equations to get the formula?