# Questions Asked onMarch 3, 2015

1. ## Chemistry

For the titration of 50.00mL of 0.1000 M ammonia with 0.1000 M HCl, calculate the pH (a) before the addition of any HCl solution (b) after 20.00mL of the acid has been added

2. ## Chemistry Dr. Bob

Balanced Equation: 2PbS+ O2 --> 2PbO +2SO2 How many grams of oxygen are required to react with 0.124mole lead(II) sulfide? Ummmm.. I tried to convert it to grams? 0.124 mol * molar mass of PbS (239.3) = 29.67 g of PbS then tried to plug it into the

3. ## English

1. It rains more often. 2. It rains oftener. 3. It rains most often in this area. 4. It rains oftenest in this area. ---------------------------------- Which ones are grammatical? Are all grammatical? Which ones are commonly used?

4. ## quant

8 cars are in race and different timing for each car then find avg speed.

6. ## English

1. village:a very small town in the countryside 2. village:a very small town in the country 3. He lives in the country. 4. He lives in the countryside. ----------------------------- Are 'country' and 'countryside' the same in meaning? Can they

7. ## English

1. If I miss so much school again, how can I become a teacher? 2. If I miss so many schools again, how can I become a teacher? -------------------------- Which one is correct? Is #2 grammatical?

8. ## Health

Powerful way to improve powerful drinkers access to treatment is to make____part of primary care

9. ## chenistry

this is confusing me so bad!! Nitrogen gas reacts with hydrogen gas to produce ammonia by the following equation: N2(g)+3H2(g)→2NH3(g) If you have 5.79g of H2, how many grams of NH3 can be produced? I said, 2/3 *5.79 = 3.86 but that's not the answer.. it

10. ## physics

An object uniformly accelerates at a rate of 1.20m/s^2 east. While accelerating at this rate, the object is displaced 470.4m east in a time of 28 s. What velocity did this object reach in this time ? I used Vf=Vi+at which will be Vf=(1.20)(28) but i feel

11. ## Math

provide a table of six values that represent a linear relation? 6 values mean that 6 number on each side x and y value?

12. ## math

Please help me on linear relation. I have tries but I am really stuck on the creating table and graphing. 1. provide a table of six values that represent a linear relation. All the y-values must be less then zero. 2. provide a table of six values that does

13. ## Chemistry

Consider two non-interacting Fermions (half-integer spin) confined in a “box” of length L. Construct the antisymmetric wave functions and compare the corresponding groundstate energies of two systems; one with particles of identical spin and the other

14. ## political theory

I don't have an assignment due, but I'm having trouble understanding the themes that are in the Persian Letters by Montesquieu. Has anyone read them? I'm in college. I'm having trouble understanding the Harem sequence, and these themes: lack of self

15. ## maths

If each glass is 250ml,how many glasses can I fill with 2ltres of orange juice?

16. ## Chemistry

What is the concentration of Na+ ions if 35.0 mL of 2.50 M NaOH is reacted with 47.0 mL of 1.50 M HCl? I did M=Moles/Volume Moles=M*V Moles=2.50M*0.035= 0.0875 Am I right? If I am right, I don't know what to do next. Please help

17. ## Math

Mr. Tankard’s minivan has a 21 gallon tank. He can travel 354 miles on one tank of gas. How many miles per gallon does the minivan get? How many tanks of gas will he need to travel 870 miles?

18. ## jinah coloege

how many electrons does a charge of 1.63 μc represent

19. ## utu secondary school papuanew guinea

A given mass of air has a volume of 6.0l at 1 atom.what volume will it occupy at 190mm hg if the temperature does not change?

20. ## math

1.39 1.61 1.6 1.53 1.62 1.61 1.64 1.59 1.62 1.51 1.52 1.6 the mean height of the students is 1.57 meters. what does it imply? a.) there are more students whose heights are below 1.57 meters b.) the average height of the students is 1.57 meters. c.) most of

21. ## math

The range of the of the ages of the Glee club officers is 5. this means that a.) the difference of all ages of the officers is 5 b.) one qualifies to be an officer if he is 5 yrs below the mean age. c.) one qualifies to be an officer if he 5 yrs above the

22. ## math

the sum of the squares of two consecutive numbers is 265. find the numbers

23. ## Physics

A chair of weight 75.0N lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of F = 45.0N directed at an angle of 40.0¡ã below the horizontal and the chair slides along the floor. Using Newton's laws, calculate

24. ## Calculus, HELP!!!!!!!!!

A cable runs along the wall from C to P at a cost of $6 per meter, and straight from P to M at a cost of$10 per meter. Let x be the distance from C to P. If M is 8 meters from the nearest point A on the wall where P lies, and A is 18 meters from point C,

25. ## physics

If a man weighs 820N on d earth what would be on Jupiter, where the acceleration due to gravity is 25.9m/s

26. ## islamic studies

In matters of fiqh, if one is faced between 2 choices: a. a stronger opinion based on Quran & Sunnah but if it turns out in reality to be wrong, one might commit a sin or make certain ibadah invalid,etc b. a weaker opinion but a safer option Which option

27. ## Statistics

so we will be having a quiz about hypotheses testing and i cant still figure out the difference between the null hypothesis with alternative hypothesis. PLEASE HELP ME DIFFERENTIATE THE TWO. And i still get confused between one tailed test and two tailed

28. ## math

James has a board that is 3/4 foot long. He wants to cut the board into pieces that's each 1/8 foot long. How many pieces can James cut from the board? My work; 👈--0-----:-----1/4-----:-----1/2-----:-----3/4 |____________|_________|__________|

29. ## Math

Hi! I need help with this. Thank you! Directions: Solve this equation by doing it twice; one time using the substitution method and one time using the graphing method. -2/3 x + y = 2 2x – 3y = 6

30. ## physics

The weight of an object is 480N on the earth and 120N on the moon,calculate the mass of the object on the moon

31. ## lo assignment

write down five physical changes experienced by boys only and five experienced by girls only during puberty?

32. ## using skills

Which of the following statements is correct regarding the use of the web in the classroom? A. It provides learning opportunities for both teachers and children. B. It should be used as a teacher resource. C. It's too advanced for young children to use. D.

33. ## Physics

a billiard ball moving at 4.0 m/s strikes another billiard ball at rest and moves off at 3.46 m/s in a direction of 30 degrees from the original of the motion. What is the velocity of the target ball?

34. ## Physics

A 100 kg crate rest at the back of the bed of a pick up truck. The length of the crate is 1 m in the length of the bed is 4 m. There is no friction between the bed of the truck in the crate. If the truck is traveling at 25 m/s just before it hits the wall,

35. ## Math

Prove that if the sides of one angle are parallel to the sides of another angle, the angles are congruent. Given: BA||ED, BC||EF, AND BEG Prove:angle ABC is congruent to angle DEF

36. ## Chemistry

calculate the density of 50.0 g of gold that occupies a volume of 2.59 mL.

Statistics show that the sales force of a certain company successfully closed 986 sales out of 1,700 sales calls. What was their percent success rate? If needed, enter decimals rather than fractions. Do not enter the percent symbol in your answer.i need

38. ## CHEMISTRY

Using a 0.20 M phosphate buffer with a pH of 6.5, you add 0.72 mL of 0.46 M NaOH to 58 mL of the buffer. What is the new pH of the solution? (Enter your answer to three significant figures.) I don't even know where to begin!! I just need a set up of the

39. ## Physics

A 1500-kg blue car is travelling south, and a 2000-kg red sports car is travelling west. If the momentum of the system consisting of the two cars is 8000kg.m/s directed at 60 degrees west of south, what is the speed of each car?

40. ## physical science

A stone of 8 kg mass falls from the top of an 80 m-high building. Find the velocity of the stone when it reaches the ground

41. ## using skills

All of the following are math materials except A. two-dimensional cutouts. B. wipe-off folders. C. paper and pencil. D. sand and clay. b. is my answer

42. ## math

16. A picture of a star has 6 identically matched points. What is the least number of degrees that you can rotate the star onto itself? (1 point) 60° 120° 180° 240 How do i figure this out?

43. ## Chemistry

an ideal system absorbed some amount of heat and gas expand and the piston move to 0.4 meter against than the atmospheric pressure. If the cross sectional area of the container is 0.6 meter2. What is the amount of heat absorbed?

44. ## Statistics

find the probability that you will get a "sum" of 5 or greater in rolling two dice experiment. How do you do this?

The value of the dependent variable in a function is always __________ the value of the independent variable. 1.GREATER THAN 2.DEPENDENT ON 3.LESS THAN 4.EQUAL TO

Choose either homogeneous or heterogeneous. Tea: homogenous Concrete: heterogeneous Soda: homogeneous Soapy Water: homogeneous Salt Water: homogeneous Granite: heterogeneous Please help, and thanks lots :D

47. ## Physics

Consider an air-bubble level that is sitting on a horizontal surface. Initially, the air bubble is in the middle of the horizontal glass tube. (a) If the level is pushed and a force is applied to accelerate it, which way would the bubble move? Which way

48. ## life orientation

analyse the effectiveness of communication in relationship

49. ## Social Studies

1. What dynasty ruled the Korean peninsula from AD 668 to AD 935? Meiji Qin Silla*** Tokugawa 2. What type of government ruled North korea after World War II communist**** democratic dictatorship oligarchy 3.Both Japan and the Koreas been influenced by

50. ## math

3000 for 3 years at 1.8% compounded monthly

51. ## social studies

which is the main climate in cyprus 1. tropical and dry 2. continental cool summer 3 mediterranean 4 humid subtropical

52. ## Physic

A 60-g bullet fired at two blocks resting on a surface with coefficient of kinetic friction =0.5. The bullet pass through a 8-kg block and make this block slides 0.8 m. And then the bullet lodges in another block which is 6 kg. The bullet make it slides

53. ## maths

1.solve the set of linear equation by matrix method.a+3b+2c=3,2a-b-3c=-8,5a+2b+c=9 solve for a,b,c 2.solve by Guassian elimination method, (a)a+2b+3c=5,3a-b+2c=8,4a-6b-4c=-2, (b)

54. ## History

what did reconstruction fail to do in south carolina? A.readmit the state to the union B.establish the belief in white supremecy among some group C.return control of state politicsto local leaders D.free african americans from slavery? I Got C but im not

55. ## History

What in his life made president Lincoln want to abolish slavery? I know that he created the Emancipation Proclamation to end slavery.

56. ## Statistics

A random sample of state gasoline taxes is shown for 12 states. Use the data to estimate the true population mean gasoline tax with 90% confidence. Does your interval contain the national average of 0.21? assume normal distribution.

57. ## maths

A number of circles touch each ather. The area of the smallest circle is 4n cm^2 and each consecutive circle has area 9/4 times that of the previous one. If the distance AB=665/8. Line AB passes at the centre of the circles. How many circles are there?

58. ## Math

line segment AB is parallel to line segment CD and AB is not equal to CD. Prove that A, B, C, and D must lie in a plane and form a trapezoid. I really don't understand and i need help, thanks.

59. ## american Literature check answers

How were the Dark Romantics different from the Transcendentalists? They explored the darker sides of the human soul. They revered reason over intuition or imagination. They believed in the innocence of all people. They disregarded any spiritual side of

60. ## MATHS

in a GP,the product of the 2nd and 4th terms doubled the 5th term and sum of the first four term is 80.Find the GP.

61. ## algebra word problems

The length of a rectangle is 6 inches longer than its width. The perimeter of the rectangle is 28 inches. If x represents the width of the rectangle, which equation can be used to find its value?

62. ## american Literature check answers part 2

What thought torments the speaker in "The Raven"? The raven has been sent by his greatest enemy. The speaker has wasted his life studying old books. The speaker will never see his beloved Lenore again. The speaker will never understand the books he reads.

63. ## Chemistry

How many grams (of mass m) of glucose are in 355mL of a 5.50% (m/v) glucose solution? You have a solution that is 18.5% (v/v) methyl alcohol. If the bottle contains 2.49L of solution, what is the volume (V) in milliliters of methyl alcohol? A 6.00 % (m/v)

64. ## word problem

Ieda bakes 73 cupcakes and accidentally drops 5 of them. She divides them equally into 13 containers for a bake sale for the school band. How many cupcakes does Ieda have left?

A deep-sea diver must descend and ascend in short steps to equalize pressure on his body. If the diver rises toward the surface too fast, he may suffer from a physical condition called "the bends". Suppose the diver started at 82 feet below the surface and

66. ## Probability

Consider 10 independent tosses of a biased coin with the probability of Heads at each toss equal to p, where 0

67. ## Chemistry

Calculate the mass/volume percent of a NaCl solution in which 182g of NaCl is dissolved in enough water to give a total volume of 4.78L . Would I do 182/4780ml *100?

68. ## math

anne spent half of her money on CDs. After se spen half of what was left on stickers

69. ## math

Points $D$, $E$, and $F$ are the midpoints of sides $\overline{BC}$, $\overline{CA}$, and $\overline{AB}$, respectively, of $\triangle ABC$. Points $X$, $Y$, and $Z$ are the midpoints of $\overline{EF}$, $\overline{FD}$, and $\overline{DE}$, respectively.

70. ## Math - Geometry - Triangle Medians and Altitudes

Points D, E, and F are the midpoints of sides BC, CA, and AB, respectively, of triangle ABC. Points X, Y, and Z are the midpoints of EF, FD, and DE, respectively. If the area of triangle XYZ is 21, then what is the area of triangle CXY?

71. ## algebra

The drama club has 41 members. There are nine more girls than boys. How many boys are in the club

72. ## solid mechanics

A Piece of material 15 cm long by 2.5 cm square is in compression under a load 100 KN. If the modulus of elasticity of the material s 105 GPa and Poisson¡¯s ratio is 0.25, find the alteration in length if all lateral strain is prevented by the

73. ## solid mechanics

A steel plate is subjected to tensile stresses of 200MPa and 150 MPa at right angles to each other. Determine the normal and tangential stresses on a plane inclined at 60 to the 200 MPa stress. Also find the plane on which the resultant stress has maximum

74. ## physics

a stone is thrown upward with a speed of 24.0m/s how fast is it moving when it reaches a height of 13.0m?

75. ## physic

Question Part Points Submissions Used A hypodermic syringe contains a medicine with the density of water (figure below). The barrel of the syringe has a cross-sectional area of 2.88 10-5 m2. In the absence of a force on the plunger, the pressure everywhere

76. ## Chemistry help!! Fast

true or false??? The larger molecules dissolve best in a solvent with a low molecular weight.

77. ## math

sasha has a bag of l red sock, 1 blue sock, 1 white sock, and 1 green sock. she pulls a sock out of the bag without looking, puts it back, and pulls out another sock out of the bag without looking. What is the probability that she will pull out a white

78. ## life oriatation

to what extent can intrapersonal conflict affect:choice of career

79. ## Math, Analytic Geometry

Derek wants to determine the height of the top of the backboard on the basketball goal at the playground. He places a standard 12-inch ruler next to the goal post and measures the shadow of the ruler and the backboard. If the ruler has a shadow of 10

80. ## Chemistry Help

WHAT???? which of these are electrolytes?? CH3CH2OCH2OH PCl3 Na2CO3 O2

81. ## algebra II

The following rational function describes concentration in blood of a certain medicine taken once depending on time, find a. the horizontal or oblique asymptote(s), if any, b. the vertical asymptote(s), if any, c. describe their possible meanings.

82. ## math

A trainer for a professional football team keeps track of the amount of water players consume throughout practice. The trainer observes that the amount of water consumed is a linear function of the temperature on a given day. The trainer finds that when it

83. ## Criminal Justice

I need 8 reason why innocent individuals are wrongfully convicted, and i need an example for each. Is there a website or article that can help me answer this?

84. ## Earth Science

Which of the following is NOT generally associated with a thunderstorm? A. tornado B. lightning C. dry air

85. ## physics

Object 1 has a velocity of 3m/s and a mass of 5kg. Object 2 also has a mass of 5kg but isn't moving. Object 1 collides with Object 2 and they move off together. Work out their speed using the principle of conservation of momentum.

86. ## Chemistry Help

I have no idea where to begin with this?? This class is moving so fast! Dr. Bob222 I made a 100 on my prelab!! and the online test was so fast I was going through my notes and I was scrambling to figure it out and look up stuff on the periodic table and

87. ## Biology

When talking about Mendel's experiments, can the Parent (P) generation also be called P1?

88. ## math

Christopher made three and one fourth dozen cupcakes . He added vanilla icing to one third and chocolate to the rest . How many cupcakes in dozen have chocalote icing ? I need answer and show work pls

89. ## Child education

As Ms. Ramirez planned for her group time, she considered the best way to begin. Which one of the following would NOT be an effective way for her to begin group time? A. Asking individual children if they brought something to share B. Leading children in

90. ## stats

a captain claims that at least 85% of the residents in his barangay have household pets. to test this claim a researcher randomly selected a sample of 550 residents and find that 495 of them do have household pets. at 0.05 level of significance. formula

91. ## math

If you buy two DVDs for $8 each and one poster for for$6 and there was a 40% store discount what was the sales price of the purchase How do I get started I am confused???

92. ## Algebra 2

Simplify each sum or difference. State any restrictions on the variable. -3x/x^2-9+4/2x-6

93. ## calculus

If u=(0,2,3) and v=(1,3,-1) find the projection of u onto v a) 1/3 u b) 3/11 v-> -> c) (1,1,-1) d) (1/3, 1, -1/3)

94. ## chemistry help

When carbon dioxide and carbon react the balanced equation is Co2+C--------------2Cq Calculate the mass of carbon monoxide formed from 4.4g of carbon dioxide

95. ## calculus

Find Indefinite Integral of dx/(x(x^4+1)). I think that Im complicating it too much. I moved the dx out making it 1/(x(x^4+1))dx than 1/(x^5+x)dx. I think i have to use formula indef integral of dx/(x^2+a^2) = 1/a(tan^-1(x/a)) but im stuck i don't know

96. ## math

explain how you can use a number line to show that 3/6 and 1/2 are equivalent fractions?

97. ## Math

Warren poured some chips of the Pringles can, 6 chips were broken which represents 8% of the can. In all, how many chips were in the Pringles can?

98. ## Chemistry

What volume (mL) of 0.20 M HCl needs to be added to 1.23 L of 0.10 M acetic acid to reduce the percent ionization to 1.00%? Assume the volume of HCl added is negligible compared to the volume of the whole solution, and that the small x approximation is

I have been trying to work this out but just cant. Find the function rule. X -2 -1 0 1 2 Y 9 4 -1 -6 -11 Thanks, ~JH

100. ## Social Studies

Name two advances made by Indian mathematicians without which computers would be impossible today.

101. ## Criminal Justice

what is the definition of government miscounduct

102. ## Science

Name and explain in detail four organizations or agencies that work to address human violations

103. ## Math

Several friends each have 2/5 of a bag of peanut left over they should bought 2 fewer bags

104. ## chemistry help fast

The following reaction occurs in a blast furnace Fe2O3 +3Co--------2Fe+3Co2 Calculate the mass of carbon monoxide needed to reduce 16 tones of iron (111) oxide

105. ## chemistry

Can someone show me the answer to this as I am well confused. What mass of lead oxide reacts with 2400dm3 of carbon monoxide?

106. ## Mathematical literacy

Assume there are 4 people living in the house nd their daily average consumption is 25litres per person per day nd there are 30days in a month . Calculate the average monthly water consumption for the household.

107. ## what to say?

my assignment was to create a product so i chose an energy drink called electrify however i don't know what to say when presenting what can i say so ppl can buy my product or simply anything to say during mt presentation

108. ## geometry

Rita bikes 4 miles in 21 minutes . At this rate, how many miles does he bike in a hour ?

109. ## math

Here are linear equations Find the value of x and y 1/2x + 1/3y = 8 3/2x - 4/3y = -4 I got y= -72/7 and x= 160/7

110. ## Physics

A cannon shoots a cannonball with a mass of 20 kg and a net force of 2000 N a) label the three force pairs(HORIZONTAL ONLY) b) What is the acceleration of the cannonball? c) Does the cannon continue to move/ Explain why or why not. Specify which force will

111. ## math

if u buy 15 bags of chips and it only costs $20 and u have$62 how much change are going to get back

112. ## civics

hi i need help on the cold war? and world war 2? what happen in the cold war and world war 2

113. ## Science

Human Body & Disease Practice 1) Which of the following effects would you expect if red blood cells were shaped like neurons? :They would not be able to move as easily through capillaries.*** :They would more easily carry out gas exchange in the alveoli.

114. ## Math

Ms. Henderson’s 5 art classes are turning in their final projects for the year. The table shows the numbers and type of project turned in during her first 4 classes. Part A Write the ratio of paintings to sculptures for each class in simplest terms.

115. ## Chemistry (organic)

You have a solution that contains 5.0 g of oxalic acid dissolved in 150 mL of water. This solution is placed in a separatory funnel, and then 100 mL of diethyl either is added to the separatory funnel and an extraction is performed (diethyl ether and water

116. ## pharmacy tech

2. How do you determine the number of grams of an active ingredient in a solution based on the percent strength?

117. ## Earth Science

What color will a star be with a surface temperature of 5000–6000 K? A. blue B. yellow C. white my choice is B yellow

119. ## Chemistry

What is the percentage of nitrogen in N2O?

120. ## economics

The production function for our Production is Q = 25L - 0.05L^2; where Q is output and L is man-hours. What level of man-hours will maximize total output?

1. How Will resistance change when the voltage increases in an electrical circuit if the current remains constant A. It will decrease **** B. It will stay the same C. It will increase D. It will decrease, then increase

122. ## Chemistry

How many nonbonding electrons does phosphorus have? is it 5 valence electrons

123. ## math

A number of circles touch each ather. The area of the smallest circle is 4picm2 and each consecutive circle has area 9/4 times that of the previous one. If the distance AB=665/8. Line AB passes at the centre of the circles. How many circles are there?

126. ## Physics

Can someone walk me through how to work this? A block is being pushed up a frictionless incline by an applied horizontal force, F=12.7N. (The angle is θ = 23.80° and the mass is 1.70kg. a) How many forces are acting on the block? b) How many of those

127. ## Physics

Can someone walk me through how to work this? It's worded weirdly and I'm not sure how to solve it. Mass M1= 2.2 kg lies on a frictionless table, pulled by another mass M2= 4.1 kg under the in of Earth's gravity. a) What is in N the net force acting on the

128. ## Physics

Can someone help me solve this one? I've tried it a few times, but I don't think I'm getting it right. A block of mass M = 2.2 kg starts from rest at a height of 3.6 m on a fixed inclined plane. The coefficient of kinetic friction between the block and the

129. ## Math

The area of a rectangular field is given by the trinominal t^2-4t-45. The length of the rectangle is t+5. What is the expression for the width of the field? A) t-9 B) t-5 C) t-11 D) t-7 Can someone please help? Thank you!

130. ## History

Compare and contrast the ideas and policies, domestic and foreign, of Roosevelt, Taft and Wilson. Where can I find information that compares their domestic policies? -My Answer so far: Roosevelt, Taft, and Wilson were all progressive reformers, but their

131. ## History

How and why did the Conservation Movement begin? (What makes the Progressive Era Conservation Movement different from environmentalism today?

132. ## History

In what ways did the Progressive Era set the stage for U.S. involvement in the world today? In what ways are things different now?

133. ## Chemistry

What is the volume of 20.55 grams of hydrogen gas at a pressure of 1.215 atmospheres at 29.3 degrees Celcius? how do you solve this

134. ## Chemistry

What is the magnetism of F2+, and how many unpaired electrons does it possess? Would F2+ act the same way as F+? In that case it would be paramagnetic and have 2 electrons.

135. ## Math

Bill can ride his bike 7 1/2 miles in a hour. a. How far will he ride in 3 hours? b. How far will he ride in 1/3 of an hour? I think for a. the answer is multiply so it would be 22 1/2 miles and for b. it would be 2 1/2 miles. Is this correct?

136. ## Math

Find the area of the basketball court. The length of the rectangle is 100m and the radius of the seni-circle is 25m.

137. ## math

At a school camp, 30% of the students were boys. When 87 students left the camp after the second day, half the original number of boys were left behind, and the number of girls decreased by 20%. How many girls were at the camp in the beginning?

138. ## Math

Sue's kitten eats 1/12 pound of food everyday. If Sue buys food in 5 pound bags, how many days does one bag of food last? I think I would divide and the answer would be 60 days is this correct?

139. ## MATH

In Mrs.Marshall'd classroom, 6/7 of the students play sports. Of the students who play sports, 4/5 also play as instrument. If there are 35 students in her class, how many play sports and an instrument?

140. ## Math

Amy uses 8 cups of flour to make 3 identical loaves of bread.How much flour is in each loaf? I think it is division and I got 2 2/3 cups of flour. Is this correct?

141. ## Math

I can throw a ball 10 1/3 yards. My cousin can throw a ball 13 1/12 yards. How much farther can my cousin throw the ball? I think I have to subtract and my answer is 2 3/4 yards farther. Is this correct?

142. ## Math

Hank's fish bowl holds 9/10 gallon of water. It is now 2/3 full. How much water is in the bowl? I subtracted and my answer is 7/30. Is this correct?

143. ## Chem Dr. Bob Plz

Dr. Bob, I just did a home lab with citric acid and sodium bicarbonate and had to put them in cups and measure before and after.. I put 1.02g of sodium bicarbonate in a cup with water and stirrer (54.66g) then added .77g of citric acid and supposed to add

8sin^4(x)

145. ## Chemistry

Identify the precipitate in this reaction: calcium nitrate reacts with sodium phosphate. 2Na3PO4 + 3Ca(NO3)2--->6NaNO3 + Ca3(PO4)2 is that right ?

146. ## Chemistry

Hello, I'm having some trouble getting started on this question: "Calculate the volume and mass required to make 0.1 M solutions of Propionic Acid (1.0 M) and Sodium Propanoate (96.06 g/mol)" I would normally not have trouble answering this question when

147. ## Math

Bill plays ball for 9 hours each week. His friend Mark spends as much time playing ball. Who plays more ball? I think I have to divide. So I think Mark plays more ball by 10 4/5 hours. Is this correct? Thank you so very much for your help Ms. Sue.

148. ## English

Is 'purse' and 'handbbag' the same? Are they used by women?

149. ## Chemistry

The following is a Limiting Reactant problem: Magnesium nitride is formed in the reaction of magnesium metal with nitrogen gas in this reaction: 3 Mg(s) + N2(g)  Mg3N2(s) How many grams of product are formed from 2.0 mol of N2 (g) and 8.0 mol of Mg(s)?

150. ## calculus

Find the arc length of the given function/curve on the given interval. y=ln(x-sqrt(x^(2)-1)); x ϵ [1, sqrt(2)]

151. ## math

I am less than 20 I am an odd number I am the square root of 225 I am

152. ## math

emily pays $93 each year to belong to a photography club. next year, the membership fee will increase by 12.5%. emily estimates that the membership will just be under$100 each year after the increase. what is a true statement about emily's estimate? a.

153. ## Math

Sara long jump was 10 feet. That is 5/6 foot longer than Tom's long jump. Did Tom jump more or less than 10 feet? I think I have to multiply and so Tom's jump was less by . I think his jump was 8 1/2 feet. Is tis correct?

154. ## Math

Which relation is a function? (Points : 1) A.(1, 2), (1, 5), (1, -1), (1, 4)} B. {(8, -1), (2, -1), (3, 8), (2, 5} C. {(-3, 4), (-2, 5), (0, 9), (0, 12)} D. {(7, 12), (1, -5), (3, -10), (2, -5)} Is its C :P?

155. ## Chemistry Dr. Bob

Now, I'm going to post how to figure out the theoretical yield of carbon dioxide from 1.00g sodium bicarbonate... The reaction of citric acid and sodium bicarbonate is written as H3C6H5O7(aq) + 3 NaHCO3(aq) → Na3C6H5O7(aq) + 3 H2O(l) + 3 CO2(g) Um.. I

156. ## Chemistry

Would you expect H2O or H2S to be more volatile at the same temperature and pressure? Why?

157. ## Math

What is 8 3/4 - 5 5/6 =? Shouldn't the denominator be 24 ? What is this answer please show the work.

158. ## Math

What is 13 3/5 - 6 1/4 =? Show me the work please.

159. ## chemistry

What does ammonium Iodide equation look like dissolved in water?

160. ## chemistry

Why do compounds with strong intermolecular attractive forces have higher boiling points than compounds with weak intermolecular attractive forces?

161. ## Algebra

A person's trip from the city to his cabin in the mountains was 229.6 miles. If his car used 4.5 gallons of gas for the trip, estimate the number of miles his car gets to the gallon

162. ## Chemistry

Why is the first ionization energy of a nonmetal much higher than that of an alkali metal in its same period?

163. ## English

To Mr. Reed who had previously answered my question on realism in A Raisin In the Sun and told me to to write about Travis sleeping on the couch , thank you but I need to write realism in Acts 1, 2, 3 and since you thought that only the second one was

164. ## Chemistry AP

At 20◦C the vapor pressure of pure methanol (CH3OH) is 89.0 torr and of pure water (H2O) is 17.5 torr. A solution of methanol and water has a total vapor pressure of 35.5 torr at 20◦C. Calculate the mole fraction of methanol in this solution. Assume

165. ## Art Help!!! Thank you

1.The Greek temple has often inspired the design of what type of American structure? A. amphitheater B. Colosseum C. courthouse D. Bridge Is the answer A?? Thanks in advance 2. Why might a college choose to use Greek architectural elements such as columns

166. ## math derivatives

derivative of ln[(1+v)^(1+v)(1-v)^(1-v)] I know my log rules allow me to rewrite this as ln[(1+v)(1+v)+(1-v)(1-v)] but what I do from there i don't know.... Wolfram says it is ln(v+1)-ln(v-1)but i don't know how to get that...

183. ## math

what percent of student perform at the national average. there are 32 kid

184. ## english 201

An essay on the yellow wall paper by charlotte Gilman. how do I start.

185. ## physics

A 4 cm candle sits 15 cm in front of a converging lens with a focal length of 6.0 cm. Draw a ray diagram showing the image used and determine the image distance and magnification. Please help me answer!

186. ## Chemistry

Why are the atomic masses of elements usually decimal numbers?

187. ## AP CHEM LAB

How much .25 molar NAOH would you need to add to 50 mL of 2.85 molar HCl to reach the equivalence point?

188. ## L.A

Read the following stage directions and dialouge from billy Elliot: [Billy suddenly sees DAD and freezes. His reaction puzzles Mrs. Wilkinson for a second. The music comes to a standstill. Mrs. Wilkinson turns to see Dad.] DAD: You.Out.Now What do these

189. ## Chemistry

If an element has 12 protons and 17 neutrons, how many electrons must it have?

190. ## L.A

Read the following stage directions and dialouge from billy Elliot: [Billy suddenly sees DAD and freezes. His reaction puzzles Mrs. Wilkinson for a second. The music comes to a standstill. Mrs. Wilkinson turns to see Dad.] DAD: You.Out.Now What most likely

191. ## social studies

The North liked high tariffs on foreign goods because?

192. ## chemistry

Complete and balance this reaction: sulfuric acid reacts with barium chloride

193. ## Math

What is 8 3/4 - 5 5/6 = Is 24 the Denominator for this problem? Show all the work.

194. ## Math

Come pleat the table to represent each part of the formula. The data values have been put in ascending order. ---- X, (X, - x) 2 30 ? 32 ? 33 35 49 50 50 71 73 77

195. ## Math

For the first of two basketball games the price of each reserved seat was \$1.50,the price of each unreserved seat was 5 cents, and the number of reserved seats sold was 1/25 of the number of unreserved seats sold.If, at a second game, the price of the

196. ## Chemistry

Write the formula for iron (III) sulfate. My answer is Fe2(SO4)3

197. ## math

Emma's school plans to build a rectangular basketball court with an area of 150+175t square feet. The length of the basketball court is 25 feet as shown in the following diagram. Thank you!

198. ## chemistry

Perform this operation and report the answer to the correct number of significant figures: What is the mass of a cube of aluminum that is 4.0 cm on each edge? The density of aluminum is 2.7 g/cm3. Show all calculations leading to an answer. Vcube=

199. ## math

Emma's school plans to build a rectangular basketball court with an area of 150+175t square feet. The length of the basketball court is 25 feet.What is the width of the basketball court? Thank you!

200. ## Chemistry Ap

At 20◦C the vapor pressure of pure methanol (CH3OH) is 89.0 torr and of pure water (H2O) is 17.5 torr. A solution of methanol and water has a total vapor pressure of 35.5 torr at 20◦C. Calculate the mole fraction of methanol in this solution. Assume

201. ## math

Janice plans to build a rectangular table top with an area of 60+20r square inches. The width of the table top is 10 inches. What is the length of the table top?. THANK YOU

202. ## Physics

Energy Budget for a Rocket in Free Space: Recall the analysis of the rocket engine in Project I, Flight of the Rocket. Although the momentum of the rocket and its exhaust is conserved (constant), their energy is not; energy must be supplied by the

203. ## math

Tony plans to install a window pane that has a length of 8 inches and a width of 6 inches. He decides that the length has to be reduced by z inches. He says that the new area of the window pane will be 48−z. Is Tony correct? Why or why not? THANK

204. ## chemistry

when the nuclear charge increases, does the electron;s attraction to the nucleus get stronger or weaker ?

205. ## Physics

A square coil with 30 turns has sides that are 18 cm long. When it is placed in a 0.31-T magnetic field, a maximum torque of 0.60 N⋅m is exerted on the coil. What is the current in the coil?

206. ## calculus

Find the arc length of the given function/curve on the given interval. y=ln(x-sqrt(x^(2)-1)); x ϵ [1, sqrt(2)]

how much work is done on an object with 25 kg on earth if it moves 13m? i really need help

208. ## Pre-calculus (trigonmetry)

The Bermuda Triangle is an unmarked area in the Atlantic Ocean where there have been reports of unexplained disappearances of boats and planes and problems with radio communications. The triangle is an isosceles triangle with vertices at Miami, Florida,

209. ## math

five friends went to a baseball game. three of the friends each bought a ticket for x dollars and a soda for six dollars the other two friends each bough only tickets. write and simplify and expression that represent the amount of money spent

210. ## Chemistry Dr. Bob

Plastic Cup B Mass of cup, water and stirrer: 53.75g mass of sodium bicarbonate: 2.02g mass of citric acid: 1.52g total mass of all: 57.29g mass of cup, solution, stirrer after reaction: 56.59g difference (CO2): 0.70 g Now, Here's the problems it's

211. ## Chemistry Dr. Bob222

Ok, UMMMM I thought I was good.. Till now.. Ok, For Cup C Mass of cup,water,stirrer: 55.15 Mass of sodium bicarbonate: 2.02g mass of citric acid: 0.77g total mass: 57.94g mass of cup,solution, stirrer after reaction: 57.64 difference (CO2): 0.30g Part B:

212. ## chemistry

The heat of solution of potassium acetate (KC2H3O2) in water is -15.3 kJ/mol. If 18.8 g of KC2H3O2(s) is dissolved in 655 mL of water that is initially at 25.8 °C, what will be the final temperature (in degrees Celcius) of the resulting aqueous solution?

213. ## chemistry

Given the following data: 4PCl5(s) ¨ P4(s) + 10Cl2(g) ƒ¢H = +1774 kJ P4(s) + 6Cl2(g) ¨ 4PCl3(l) ƒ¢H = -1278.8 kJ Find the ƒ¢H of the following reaction: PCl5(s) ¨ PCl3(l) + Cl2(g)

214. ## chemistry

Given the following thermochemical data: H2O(l)+2AgNO3(aq) ¡æ 2HNO3(aq)+Ag2O(s) ¥ÄH = 44.8 kJ 2Ag(s)+¨öO2(g) ¡æ Ag2O(s) ¥ÄH = -31.0 kJ ¨öO2(g)+H2(g) ¡æ H2O(l) ¥ÄH = -285.8 kJ Use Hess¡¯s Law to determine ¥ÄH for the reaction: