# Questions Asked onApril 28, 2014

1. ## chemistry

The boiling point of another member of this homologous series was found to be 309 K \rm K. What is the likely molecular formula for this compound?

2. ## Chemistry

Hydrogen peroxide can act as either an oxidizing agent or a reducing agent, depending on the species present in solution. Write balanced half-reaction equations for each of the following: (a) H2O2(aq) acting as an oxidizing agent in an acidic solution.

3. ## Simple Chemistry

A.Write a brief procedure outling how would you prepare 250mL of a 0.150M solution of a CoCl2 from solid CoCl2 and distilled water b. Using the solution from part a and distilled water, how would you prepare 100ml of a 0.0600 M solution of CoCl2 C. What

4. ## Chemistry

use the data from this table of thermodynamic properties to calculate the maximum amount of work that can be obtained from the combustion of 1.00 moles of ethane, CH3CH3(g), at 25 °C and standard conditions. on the chart is said ethane(C2H6) is -84.0. In

5. ## Chemistry

A reaction : A(aq)+B(aq) --> C(aq) has a standard free-energy change of –4.01 kJ/mol at 25 °C. What are the concentrations of A, B, and C at equilibrium if, at the beginning of the reaction, their concentrations are 0.30 M, 0.40 M, and 0 M,

6. ## Chemistry URGENT

can someone please tell me what formula's to use for the 2 following chemistry problems. 1. Calculate the solubility of potassium bromide at 23 degrees Celsius. hint. Assume that the solubility increases by an equal amount for each degrees between 20

7. ## social studies

PLEASE ANSWER! which most precisely describes the location of Southwest Asia? a) west of India b) south of the Arctic Cirlce c) north of the equator d) east of the Mediterranean Sea

9. ## social studies

ANSWER! PLEASE!! which of the following most contributed the rise of Sumer? a. farming b. military power c. isolated location d. trade

Lee wants to cut this piece of canvas into two rectangles that are 3 x 2 and 3 x 5. He wants the sum of the areas of the two small rectangles to be the same as the area of the large rectangle. Can he do this? explain.

11. ## math

Dwayne answered 80% of the questions on a quiz correctly. If he answered 40 questions correctly, what was the total number of questions on Dwayne’s quiz?

12. ## Statistics

If the critical z value for a hypothesis test equals 2.45, what value of the test statistic would provide the least chance of making a Type I error? 3.74 10,000 2.46 4.56

13. ## Chemistry

A system which undergoes an adiabatic change (i.e., q = 0) and has work done on it by the surroundings has a. w < 0, ΔU = 0 b. w < 0, ΔU < 0 c. w > 0, ΔU < 0 d. w > 0, ΔU > 0 e. w < 0, ΔU > 0

14. ## Chemistry

Balance the following equation for a half reaction that occurs in acidic solution. Use e– as the symbol for an electron. U^4+ --> UO2^+ There is a hint: In acidic solution, you may add H2O and H as needed to balance oxygen and hydrogen. When finished,

2. You finished writing a research paper on the way modern technology affects communication within families. Now you need to include the citation for an editorial published in the Sacramento Gazette titled “Should We Just Text Our Children?” However,

22. ## Math

How many ways can seven children sit on a bench? How many of these arrangements are the two oldest always together?

23. ## physics

A child and sled with a combined mass of 48.4 kg slide down a frictionless hill that is 7.15 m high. If the sled starts from rest, what is its speed at the bottom of the hill?

24. ## physics

A 60 kg stunt person runs off a cliff at 5.3 m/s and lands safely in the river 11.8 m below. What was the splashdown speed?

34. ## social studies

HELP PLEASE how do the monarchies throughout Arabia and Iraq most differ from one another? a- they have different constitutions. b- they have different elections processes. c- some have absolute power, and some have limited power. d- some are family

35. ## Astronomy

One possible energy source for the mysterious object you've just discovered is the fusion of hydrogen to form carbon-12 (the most common and stable isotope of Carbon). Hydrogen has an atomic mass of 1.00794 u, while carbon has an atomic mass of 12.010 u.

36. ## statistics

A clinical psychologist notices that admission to the psychiatric hospital she works at seem to vary by season. Using a chi-square test, she rejects the null hypothesis that hospital admission is independent of season. What conclusions can she make? a.

37. ## chemistry

1.00 of an aqueous solution contains 1.52g of a compound used in antifreeze. If the osmotic pressure of this solution at 20.0 degree C is 448 torr, calculate the molar mass of the antifreeze compound

38. ## physics

With a magnetic field perpendicular to a single 13.2 cm diameter circular loop of copper wire decreases uniformly from .670 T to zero. If the wire is 2.25 mm in diameter how much charge moves past a point in the coil during this operation?

39. ## Chem

Write a brief procedure outling how would you prepare 250mL of a 0.150M solution of a CoCl2 from solid CoCl2 and distilled water

52. ## MATH 12

The total surface area of a square-based open top rectangular box is 12 square units. Find the dimensions of the box such that the volume is the maximum.

53. ## College Algebra

A rancher needs to build four identical pens for his animals as shown in the diagram below. He has 240 feet of fencing. He does not need to put the fence along the barn. Find the length and width that would maximize the area of the pens. What is the

54. ## chemistry

how many grams of hydrogen are needed to completely react with 8 moles of nitrogen from this equation N2+H2=NH3

A simple interest calculation provides a useful estimate of what compound interest will be if ____________

56. ## Math-Help

A rock is tossed straight up into the air. The height h (in feet) t seconds after it is tossed is given by the function: h(t)=-16t^2+100.4t+5.1 (a) Make a table of values for 0 to 10 seconds. (b) Graph the function. (c) What is the initial height of the

57. ## math

if two dependent samples of size 20 are used to test the difference between the means, the degrees of freedom for a t-statistic is 19, true or false

58. ## Finance

ABC Company is engaged in the manufacturing of electronic equipment. The Company has reported net loss for the year 2013 but its Cash Flow Statement is showing a positive net cash flow. Being a student of Business Finance, you are required to discuss

59. ## Math

Ryan left the science museum and drove south. Gabriella left three hours later driving 42 km/h faster in an effort to catch up to him. After two hours Gabriella finally caught up. Find Ryan's average speed

60. ## math

the length of a rectangle is 3 times its breadth.its perimeter is 64cm.find its length?

61. ## Calculus

How do you find the first and second derivative of the following function? P(t)=20/(1+3e^-0.02t)

62. ## Math

A cell phone company charges a monthly fee of $17.95 and$0.03 per minute Write an equation that represents the cost (c) for using the cell phone for minutes (m) Use your equation from part a to find the cost for using the phone for 150 minutes

63. ## Biology

Hormones are _____? a) produced only in response to environmental stress b) are all under the control of the pituitary gland c) signals that must interact with DNA in order to be effective d) always proteins I feel like it is b) because hormone receptors

64. ## Math

Simplify (3 sqrt 8 + 4 sqrt 9)^2.

65. ## Algebra

Simplify each expression. State any excluded values. (2x^2 + 6x) / 10x^3

66. ## math

A 12 cm by 12 cm ice cube tray is in the shape of a cuboid with twelve hemispheres inset. The depth of each hemispheres is 1 cm. a) If all the hemispheres were filled with water, calculate the total volume of water that the ice cube tray could hold. It is

67. ## chemistry

calculate the vapor pressure of a solution 0.53 mol of cholestrol in 4.1 molof toluene at 32 degree C. pure toluene has a vapor pressure of 41 torr at 32 degree C

68. ## chemistry

what is the boiling point of 0.212 m lactose in water?

69. ## physics

The electric potential increases from 10 V to 70 V from the bottom plate to the top plate of a parallel-plate capacitor. We are going to move a charge of +5 x 10-4 C from the bottom plate to the top plate. What is the magnitude of the change in potential

70. ## A.P English

We're supposed to point out some parallelism in the book "Beloved" by Toni Morrison. When I looked it up, I found things about the people the book is based off of being considered parallelism. Isn't that allusion, though? Parallelism is when a phrase is

71. ## Physics

A sniper fires a bullet at 120 m/s at 30° above the horizontal from the roof top of a 35 m high parking garage. If the bullet strikes the level ground beside the parking garage:

72. ## Chemistry

A saturated solution of magnesium iodate has a temperature of 50°C. it contains 175g of dissolved solute. What is the volume of the solution?

1. A vibrating point on a spring travels 60 mm during three cycles. What is the amplitude of the vibration? my answer: I got 10 mm but I'm not sure if it is the correct answer. 2. For two connect pendulums to resonate, they must have the same: a) mass b)

74. ## math (2)

Compute the following values for the given function. f(x, y) = 5xye^(x^2+y^2) a. f(0,0)= ? b. f(0,1)= ? c. f(1,1)= ? d. f(-1,-1)= ?

75. ## statistics

for a hypothesis comparing two population means, what is the critical value for a one-tailed hypothesis test, using a 5percent level of significance level, with both sample sizes equal to 13? the standard deviations for the samples are 5 and 7. assume the

76. ## geometry

ee wants to cut this piece of canvas into two rectangles that are 3 x 2 and 3 x 5. He wants the sum of the areas of the two small rectangles to be the same as the area of the large. Can he do this? explain.

77. ## Chemistry

Dear Sir DrBob22 Thank you for your response we have an oil well. the well column has been completed (filled up) with completion fluid of gasoline. we want to stimulate the well by 28% HCL. if 28% HCL is to be injected into the the well column, whether a

78. ## biology

What are some of the costs of the destruction of the rain forest?

79. ## math (4)

Find the domain of the function. Write your answer in interval notation. (If you need to enter ∞ or -∞, type INFINITY or -INFINITY.) h(u,v) = sqrt(4-u^2-v^2) u^2+v^2 = ?

80. ## chemistry

Under standard conditions, the Gibbs free energy of the reactants G,std(reactants) in a reaction in the gas phase is 232.94 kJ and the Gibbs free energy of the products G,std(products) is 211.56 kJ. Calculate the value of the equilibrium constant for this

81. ## Social work

What kinda of game board or card game should I create about gay people? I need ideas. Thanks.

82. ## English

Why traditional african marriege is an advantage for men only nt women?

83. ## Math

What happens to the volume of a rectangular prism length, the width, and the height by 2?

84. ## math

Evidence of an increased risk of lung cancer associated with cigarette smoking was sought by Doll and Hill. In one study, 649 lung cancer cases were matched by age, and gender to 649 controls; 647 of the cases and 622 of the control had a history of

85. ## physics

A large cube (one side measuring 1.0 m) is submerged in water, with the top face of the cube 8.7 m below the surface. Find a) the force exerted by the water on each face of the cube. b) the buoyant force on the cube.

strength of the arguments about Tarbell’s position on women suffrage

87. ## Homework helpline?

Is there a homework helpline for college level I can call and ask homework questions through the phone? I know there is one that is available for elementary school and middle school, and it would seem a little ludicrous for one to be available for this

88. ## Math-Help

A manufacturer has determined that pro t P (in dollars) is a quadratic function of dollars per month a spent on advertising. The relationship is given by p=1+50a-0.1a^2 if a is at most 500 dollars per month -How much should be spent on advertising if pro t

89. ## Epidemiology

1. Evidence of an increased risk of lung cancer associated with cigarette smoking was sought by Doll and Hill. In one study, 649 lung cancer cases were matched by age, and gender to 649 controls; 647 of the cases and 622 of the control had a history of

Decided wheather work is being done or not. If it is being down write W. If not write N 1. You throw a baseball a distance of 20 meters. My answer: W 2. You lift a suitcase to put in the overhead luggage compartment of a plane. My answer: N 3. You push

91. ## statistics

if we are testing for the difference between two populations, it is assumed that the two populations are approximately normal and have equal variances, true or false

92. ## Physics

Estimate the total amount of translational kinetic energy in a small classroom at normal room temperature. Assume the room measures 5.00mm by 12.0mm by 4.00mm .

93. ## math

A 12 cm by 12 cm ice cube tray is in the shape of a cuboid with twelve hemispheres inset. The depth of each hemispheres is 1 cm. a) If all the hemispheres were filled with water, calculate the total volume of water that the ice cube tray could hold. It is

Revising sentences for agreement. There is either an error in subject-verb agreement or an error in pronoun-antecedent agreement 1. Many a girl has taken Shirley Chisholm as their model of success. My answer: Many girls has took Shirley Chisholm as their

95. ## Biology

Hormones are _____? a) produced only in response to environmental stress b) are all under the control of the pituitary gland c) signals that must interact with DNA in order to be effective d) always proteins I feel like it is b) because hormone receptors

96. ## Physics

A certain planet is located 3.54 x 10^11 m from its sun. If its orbital period is 4.9 x 10^7 s, find the mass of its sun.

97. ## physics

The potential energy of a +2 x 10-6 C charge decreases from 0.15 J to 0.05 J when it is moved from point A to point B. What is the change in electric potential between these two points? Do not enter any (-) sign in your answer.

My last questions. Direction: Proofread for correct verb forms. If sentence is already correct write C 1. Luis Ortega has been describe as history's greatest rawhide braider. My answer: Luis Ortega have been describe as history's greatest rawhide braider.

99. ## physics

What is the total internal kinetic energy of 16.2 moles of a monatomic ideal gas at a temperature of 279 K? KE =

100. ## physics

Your vertical spring accelerometer has a 40 g mass hanging from it. You climb aboard the roller coaster that starts at rest and watch the accelerometer read 0.45 for 5 seconds while descending the first peak and then change to 2.8 for 2.5 seconds while

101. ## Math

A 12 cm by 12 cm ice cube tray is in the shape of a cuboid with twelve hemispheres inset. The depth of each hemispheres is 1 cm. a) If all the hemispheres were filled with water, calculate the total volume of water that the ice cube tray could hold. It is

102. ## Biology

Describe how a monomer is the basic unit of all macromolecules.

103. ## biology

What are some factors that might slow destruction of the rain forest?

104. ## math

Having a hard time with equal and groups.. 13 into 6 groups and what is left over..

105. ## physics

A steel (\alpha = 12 x 10^{-6} ^o C^{-1}) container with a volume of 548 {cm}^3 is filled with oil (\beta = 0.7 x 10^{-3} ^oC^{-1}). If the temperature is increased by 10^oC how much oil overflows? V_{spillage} =

106. ## ela

Is there another word/phrase for the value "treat others the way you want to be treated"?

115. ## pipe fitter test certification

Please Help!...I am in need of a study guide for my pipefitters test, or an outline of what's on the test. Unfortunately I am not able to take the class available. PLEASE if you know of one or where one would be available. Any information will be greatly

116. ## physics

A charge of +0.5 C is moved from a position where the electric potential is 10 V to a position where the electric potential is 70 V. What is the the change in potential energy of the charge associated with this change in position?

117. ## biology

What is a description of the Amazon rain forest—definition of rain forest; characteristics ; location and size of the Amazon rain forest

118. ## biology

Describe the resources found in the Amazon rain forest—why is the rain forest so important?

119. ## Math Help

Consider the quadratic equation (a) Solve the equation using the quadratic formula, expressing your answer in terms of k. (b) What condition on k will assure that the equation has exactly one solution? (c) What condition on k will assure that there are two

120. ## Law

Which of the following is an example of third-party policing? A. The police coercing a slumlord to fix a problem at one of his or her apartment complexes or face possible civil consequences B. The police using their power and authority to force the owner

121. ## Astronomy

Imagine that a rival astronomer proposes that your mysterious object is actually the mouth of a wormhole to another dimension. The rival astronomer calculates that the wormhole mouth would need to be 10^13 m in diameter and would last for around a thousand

122. ## Astronomy

Another possible energy source would be gravity. Imagine that the strange object contains a black hole of mass mbh. You drop a star of mass m into it. If the star of mass m starts at rest at infinity, what will the kinetic energy of the star be when it

123. ## Physics: Earthquakes

I'm studying for an upcoming exam and I came across this problem: 10 seconds separate the P- and S-wave arrival times of an earthquake which shakes you 1m. How far away is the earthquake epicenter and what is the magnitude? I'm stuck and would really

124. ## ela

explain why each word or term is either capitalized or not.EX: President George Washington ; title and name of a person. 1]Robert E. Lee was a general in the Civil War. I just need an idea of how to answer these questions so i can do the rest.

125. ## Science chemistry

How much mgs can be obtained from 20g of mg and 20 g of s by the reaction mg+s_>mgs

126. ## Biology

What are the differences between proteins produced in free ribosomes versus proteins produced in the rough endoplasmic reticulum?

137. ## Math

In an isosceles triangle, each side is 18 inches more than the third side. The perimeter equals 54 inches. What is the length of each side?

138. ## Statistics

A song must be n longer than 3 minutes and 30 seconds, or (210 seconds) Micheal Jackson founds out that his mean song length is 244.6 seconds with a standard deviation of 29/3 seconds. What is the null hypothesis and the alternative hypothesis, what is the

139. ## Chemistry URGENT

Help. what is the formula to figure out the total mass of a solution?

140. ## Chemistry URGENT/DR BOB

Hello Dr.Bob, the saturate at 60 degrees Celsius is 85.5g i hope this helps with the problem I posted at 12:49am thanking you in advance

141. ## math

The length of a rectangle is 3b + 2 and the width is 9b + 6. What is the ratio of its length to its width?

142. ## English

He is not only a great baseball player ,but also a fine pianist. Which is correct (a) preposition ( b) adjective (c) correlative (d) adverb

150. ## english

Can someone help me to write only five or ten sentences about there self, you may include any, all or none of the following details:your daily activities,your family, your hobbies, your future goals,and your favorite dinner please!!!!!??? I need help it

151. ## us history

can you check my answers please? The “silent majority” referred to A. conservative working- and middle-class citizens B. women C. a liberal coalition of ethnic minorities, women, the aged, and the poor D. the nation’s youth E. deaf-mutes in

152. ## Help- Math

Newtons law of gravity states that the gravitational attraction F between two bodies is proportional to 1 over the square of the distance d between their centers. (a) Using k as the constant of proportionality, express F as a function of d. (b) What

153. ## Algebra 2

Carsen has a choice of shirts for soccer practice. The shirts are small, medium, and large. She has a black shirt and a blue shirt. The other choice is long sleeve or short sleeve. How many choices does Carsen have?

154. ## Grammar

Write a word or phrase to describe the feeling or meaning that the end punctuation indicates. 1. There are no vacant rooms at the inn? A: Anxious feeling. 2. There are no vacant rooms at the inn. A: ? 3. Summer is here! A: Excitement. 4. Summer is here? A:

155. ## Maths

Help uta earns $33 each week weeding flowers bed in her neighborhood for the summer she calculates her total weekly expenses for supplies to be$m write an expression to show the amount uta will have after 7 weeks

158. ## Math

Simplify sqrt 250 j^4 o^5 Everything is under the radical.

159. ## Grammar

Write a word or phrase to describe the feeling or meaning that the end punctuation indicates. 1. There are no vacant rooms at the inn? A: Anxious expression. 2. There are no vacant rooms at the inn. A: Disappointed expression. 3. Summer is here! A: Excited

160. ## math question

If jack has a 63% as his grade.If he takes a test worth 9% and got 10/10 what would his grade be then?

161. ## A.P English

Would the use of the phrase "wore her out" regarding a certain character throughout the first 100 or so pages of the book count as parallelism?

162. ## algebra2

Cassandra starts working for a company for an annual salary of \$30,000.If she earns a 2% raise at the end of each year, what will her total earnings be after five years?

x-5/6

164. ## Math

At which points do the lines intersect 2x+y=8 y=-3(x-3) A. 0,8 B. 3,-2 C. 2,4 D. 1,6

165. ## Math-Clarification

Identify any real and extraneous solutions for the equations below. Sqrt p = -1 So, would this have no real or extraneous solutions?

166. ## School Help

current conditions of health? and do they need UNDP Assistance ???

167. ## Statistics

Construct a 95% confidence interval for population mean: My friends measured 40 fish and found that the mean length of the fish sampled was 3.7 cm with a standard deviation of 0.5 cm.

168. ## Chemistry

what three substances are usually electrolytes?

169. ## math

1.FIND the bank discount and proceeds on the following loans i) RM4000 FOR 3 MONTHS at 10 1/2 percent ii) RM4215 FROM 10 june to 5 august of the same year at 10 percent

170. ## modern wrld history

why is the rain forest important

171. ## Math

A filling cabinet is 35 centimeters by 70 centimeters by 115 centimeters. The bottom drawer is 30% of the volume of the filling cabinet. What is the volume of the bottom drawer?

172. ## math

How do I find the number of millimeters long a beak is?