# Questions Asked onMarch 26, 2017

1. ## Chemistry

How much heat does your body lose when 3.05 g of sweat evaporates from your skin at 25 ∘C? (Assume that the sweat is only water.) The heat of vaporization of water at 25 ∘C is 44.0 kJ/mole. Answer: 3.05g H2O*1mol/18.015gH2O= 0.169mol H2O

2. ## Chemistry

Given H2(g) + (1/2)O2(g) ---> H2O(l), dH = -286 kJ/mol, determine the standard enthalpy change for the reaction 2h2O(l) ---> 2H2(g) + O2(g) 2H2O(l) ---> 2H2(g) + O2(g) H2(g) + (1/2) O29g) ---> H2O (l) : dH = -286 kJ/mols 2H2O(l) ---> 2H2(g) + 2O2(g) :

3. ## Chemistry

When .560 g of Na(s) reacts with excess F2(g) to form NaF(s), 13.8 kJ of heat is evolved at standard-state conditions. What is the standard enthalpy of formation of NaF(s)? Start off by balancing the equation: 2Na(s) + F2(s) ---> 2NaF(s) Then make it for

4. ## maths

i have tens ones and tenths.my digits are next door numbers and they add up to9 what number am i

5. ## Physics 2

a point charge q1=+9μc is held fixed at the origin. A second point charge with a charge of-5μC and mass of 3.2 x 10^-4 kg is placed on the + x-axis, 0.90 m from the origin. a.) What is the potential energy of the pair of charges? (consider the potential

6. ## Math

Assume the carrying capacity of the earth is 9 billion. Use the 1960s peak annual growth rate of 2.1​% and population of 3 billion to predict the base growth rate and current growth rate with a logistic model. Assume a current population of 6.8 billion.

7. ## Chem

Calculate the standard enthalpy change for the reaction: 2C8H18(l) + 17O2(g) --> 16CO(g) + 18H2O(l) Given: 2C8H18(l) + 25O2(g) --> 16CO2(g) + 18H2O(l): ∆Hº = -11,020 kJ/mol 2CO(g) + O2(g) --> 2CO2(g): ∆Hº = -566.0 kJ/mol

8. ## Math

If two cylinders are similar, find the scale factor of the smaller figure to the larger figure. The surface area of the smaller area is 20 pi yards squared. The surface area of the larger cylinder is 125 pi yards squared. No radius or height is given, and

9. ## physics

Consider a ladder placed against a frictionless wall. What happens to the friction force between the ladder and the floor as you climb up the ladder? (Assume the ladder is not sliding.) A. The friction force decreases. B. The friction force remains the

10. ## Science

Three abiotic factors of about eastern himalaya

11. ## Precalculus

Write a polynomial function of minimum degree in standard form with real coefficients whose zeros and their multiplicities include those listed. 3(multiplicity 2), 5+i(multiplicity 1)

12. ## Math

You purchase a life insurance premium for​ \$250 annually. The probability of a claim is 0.001 for your age bracket. The policy is worth​ \$50,000. What is your​ gain/loss that​ year?

13. ## AP physics (multiple choice)

an object is undergoing uniform circular motion. which of the following statements is true? a. the velocity is constant b. the acceleration is constant. c. the a is constant but v varies. d. the v is constant but the a varies. E. both a and v vary.

14. ## music 394

What is ''American'' music and what differentiates it from European or African Music

15. ## math

Sam has twice as many books as Jim. If Sam gives 12 books to Jim, they will have the same number of books. How many books to they have altogether?

16. ## Bus. Math

Misu Sheet, owner of the Bedspread Shop, knows his customers will pay no more than \$140 for a comforter. Misu wants a 25% markup on cost instead of on selling price. What is Misu’s cost? (Round your answer to the nearest cent.)

17. ## Math

Manny has a piece of ribbon that one third yard long. He cuts it into two equal length to make bookmarks .how long is the piece of ribbon?

18. ## Math 120

The table shows the​ distribution, by​ age, of a random sample of 3990 moviegoers ages​ 12-74. If one moviegoer is randomly selected from this​ population, find the​ probability, expressed as a simplified​ fraction, that the moviegoer is not in

19. ## Precalculus

write a polynomial function in standard form with real coefficients whose zeros include 4, 7i, and -7i

20. ## Social Studies

21. Why did Buddhism become popular in India? (3 points) Please help with this question fast. Thx

21. ## Language Arts

"who are those old men bent over in the sunshine? Skeletons of corn" Which line or lines show the distressing tone of the poem 1. line 1 2. line 2 3. line 3 *** 4. lines 1 and 2

22. ## Maths

The height and volume of a square based pyramid are 12 cm and 100cm respectively.Find the length of the square base?

23. ## Physics

Efficiency of a single fixed pulley is 85%.what effort is needed to lift a load of 85kgf using it?

24. ## stats.help!

Each year, 64 college basketball teams compete in the NCAA tournament . Sandbox . com recently offered a prize of \$10 million to anyone who could correctly pick the winner in each of the tournament games. A. How many games are required to get one

25. ## word problems

In certain deep parts of oceans, the pressure of sea water, in pounds per square foot, at a depth of d feet below the surface, is given by P=16+7d/11 If a scientific team uses special equipment to measures the pressure under water and finds it to be 646

26. ## Math

Austin collected 30 9/10 kilograms.Exactly 2/3 of the class was blue.what is the total amount of glass was blue?

27. ## Chemistry

Calculate the amount of heat necessary to raise the temperature of 12.0 g of water from 15.4ºC to 93ºC. The specific heat of water = 4.18 J/gºC. q = ms∆T q = (12.0g) (4.18) (93.0 - 15.4) q = 3892.416 J ??

28. ## Statistics and Probability

A machine is designed to fill jars with 16 ounces of coffee. A consumer suspects that the machine is not filling the jars completely. A sample of 8 jars has a mean of 15.6 ounces and a standard deviation of 0.3 ounces. Is there enough evidence to support

29. ## Precalculus

Which of the following cannot be the number of nonreal zeros of a polynomial of degree 5 with real​ coefficients? A. 2 B. 0 C. 3 D. 4 E. None of the above

30. ## MAth

Determine when the Hamilton method gives an Alabama paradox and who lost the representative. Increase the committee size by one seat at a time, starting from an 8-member committee. Given: City A, City B, and City C are cooperating to build a community

31. ## Grade 4 Math - fractions

On pet day, 18 children brought a pet to school. Two-thirds of the pets were dogs. One ninth of the pets were cats. How many were dogs? How many were cats? How many animals were neither dogs nor cats?

32. ## Pre-calculus

An expedition walks 4 kilometers from camp on a bearing of 30 degrees, then turns and walks 10 km on a bearing of 160 degrees. Find the magnitude of the new location relative to the beginning location using vectors. -> if you can, can you possibly show how

33. ## Designing Specialty Areas

There are many different types of playgrounds. Which of the following statements comparing playgrounds is true? A. Children engage in a wider range of activities when playing in an adventure playground rather than a contemporary or traditional playground.

34. ## Math 120

Heart disease was the leading cause of death for women in the United​ States, killing​ 292,188 women in​ 2009-that was approximately one in every four female deaths. What is the chance of two non-related women in a row both having heart disease?

35. ## physics

a uniform meter rule is pivoted at 20cm mark . It is balanced when mass of 100gm on 10cm mark and mass of 50 gm on 30 cm mark are suspended. Find d mass of meter rule

36. ## Chemistry

Consider 1.00 L of the buffer system that contains 0.200 M hydrocyanic acid(HCN) and 0.150 M sodium cyanide (NaCN). The pKa of hydrocyanic acid is 9.31. What is the [HCN] after 0.020 mol of HCl is added?

37. ## algebra

A car rental company offers two plans for renting a car. Plan A:40 dollars per day and 20 cents per mile. Plan B: 56.32 dollars per day and 12 cents per mile. If you plan to rent the car for one day, and "m" represents the number of miles driven in that

38. ## Chemistry

Write the balanced chemical reaction (showing appropriate symbols and states) for the chemical reaction with enthalpy change equal to and defined by the quantity dHformation [NH3(g)] N2(g) + 3H2(g) --> 2NH3(g) Is that all the question is asking for?

39. ## eec115 electrical and electronic engineering science

two capacitor having capacitance of 10uf and 5uf are connected in series and this combination is connected in parallel with a 20v supplies this parallel combination calculate the charge on each capacitor .the voltage across the 10uc capacitor.

40. ## Math

There are four different kinds of animals on the farm. There is a different number of each kind of animal. There are 19 more cows than sheep. There are 19 more ducks than hens. There are more hens than cows What is the answer

41. ## math 1

Example 3: The table below shows the amount a banquet hall charges to feed different sized groups of people Number Of People | COST 10 \$200 14 \$252 21 \$441 23 \$471 Using a linear model, what is the approximate residual value of the cost to feed 21 people

42. ## Math

Cosmic ray bombardment of the atmosphere produces neutrons, which in turn react with nitrogen to produce radioactive carbon-14. Radioactive carbon-14 enters all living tissue through carbon dioxide (via plants). As long as a plant or animal is alive,

43. ## Economic

A new technology reduces the time it takes t9 make a pair of khaki pants

44. ## AP chem

Complete and Balance the following equation using the half-reaction method; (MnO4^-) + (CH3OH) --> (Mn^2+) + (HCO2H an explanation/step by step would be nice because i keep getting wrong answer from the H+ & H2O (they are both suppose to be 12 according to

45. ## math

the speed of a gear wheel varies inversely as the number of teeth of the gear. if a gear wheel which has 48 teeth makes 3 revolutions per minute. how many revolutions per minute will a gear wheel with 96 teeth make?

46. ## Chemistry

The enthalpy of formation for a substance corresponds to the enthalpy change for a reaction. Write the specific chemical reaction defining the enthalpy of formation of butane: Just checking to make sure this is correct: 4C + 5H2 ---> C4H10

47. ## Math

Miss Lee spent \$840 on a vacation. She spent two thirds of the amount on a train ticket and half of the remaining amount on food. How much did she spend on the ticket and food all together?

48. ## Math

A small country consists of seven states; there are 189 seats in the legislature that need to be apportioned among the seven states; and the population of each state is shown, State A: 1283 State B: 2374 State C: 2725 State D: 2155 State E: 1592 State F:

49. ## math

BC is a chord of a circle with center O and area 48pi. Point A is inside BCO such that ABC is equilateral and A is the circumcenter of BCO. What is the area of triangle ABC

50. ## Precalculus

Write a polynomial function of minimum degree in standard form with real coefficients whose zeros and their multiplicities include those listed. 2(multiplicity 2), -4(multiplicity 3)

51. ## physics

Which force(s) provide(s) the centripetal force needed for a car to make a turn on a banked curve? A. Weight, only B. Tension, only. C. Friction, only. D. Coriolis force, only. E. Friction and normal force. Is it D?

52. ## Math

Use the Hamilton method of Apportionment to make the assignment. In a recent census, Iowa's population in thousands was 4,503, Illinois' was 8,220, and Indiana's was 5,300. Allocate 31 members of the U.S. House of representatives to these three states.

53. ## Designing Specialty Areas

You're designing a space for families. Which of the following would be an important step in developing the space? A. Form a group of current teachers and teaching assistants to design the area. B. Hire a consultant to design the space. C. Have the director

54. ## Probabilities and Statistics

How does the number of study hours change during a semester? How do you determine what graph to use? I am so confused

55. ## OK History

I need someone to make sure my answers for my Oklahoma State History homework are correct. I put *** by my answers. If I am wrong, please explain why or help me find the right answer. Thanks in advance! 1. Indian Territory after the Civil War experienced

56. ## pre calc

A ship is tied to two anchors on the shoreline. The anchor line on the left forms a 46 degree angle with the shoreline and is 350 feet long. The anchor line on the right forms a 63 degree angle with theshoreline and is 283 feet long. Find the exact

57. ## Physics

A 240 kg roller coaster car Rolls over the crest of the roller coaster with a speed of 2.2m/s.if it falls through a vertical height of 12m down the tracks to the bottom of a trough, how fast will it be travelling? So here's what I did but I don't think

58. ## Designing Specialty Areas

Bolinda wants to create an illusion of more space in her program. Which of the following techniques would assist her to do this? A. Using different rugs in different parts of the room B. Painting the walls a variety of different colors C. Closing the

59. ## science

would all of the lead (ii) bromide (ksp = 6.3 x 10^-6) dissolve if 2.25 g is added to 500 mL of water

60. ## chemistry

Write a comlete, balanced chemical equation for the reaction that occurs between aqueous iron(II) sulfate,FeSO4, and aqueous potassium hydroxide

61. ## AP Chem

Write the overall net-ionic reaction that occurs when iron (ii) hydroxide (Fe(OH)2, Ksp = 7.9 x 10^-15) is dissolved in a 0.500 M sodium cyanide solution forming a complex ion. (Fe(CN)6^4-, Kf = 7.7 x 10^36) Determine the value of the equilibrium constant

62. ## health

1.why is it necessary to make a pressure bandage for a bleeding injury a)to cover the wound so id does not get contaminated b)to create a barrier so the blood does not infect the rescuer

63. ## Precalculus

There is at least one polynomial with real functions with 9+i as its only nonreal zero. A. The statement is​ false, because the Fundamental Theorem of Algebra dictates that there must be n complex zeros for a polynomial of degree n. B.The statement is

64. ## math

Mrs koh is now 58 years old and corrine is 28 years old. How many years ago was mr skoh 6 times as old as corrine?

65. ## math

The area of a spherical balloon expand at a rate of 0.4cm square/s .find the rate at which its volume expand when the radius is 12cm

66. ## English

1. He read this book in a day. 2. He read this book within a day. 3. He read this book at the end of a day. ------------------------------ 'In' means 'within' or 'at the end of' according to a dictionary. Q1: Does #1 mean #2? Q2: When he read the book for

67. ## English

1. He will come back in five days. 1-2. He will come back at the end of five days. 2. He will come back within five days. 3. He will come back after five days. 4. He came back after five days. -------------------------------- Does #1 mean #1-1? What about

68. ## Precalculus

Find a polynomial with real coefficients that has the given zeros. -1 and 4-5i

69. ## Chemistry

Potassium is a reactive element. Bromine is a reactive element. Write the complete balanced chemical equation using appropriate chemical symbols for the reaction when potassium reacts with bromine to make a solid product showing correct symbols and states

70. ## Geometry

The sides of one triangle are twice as long as the corresponding sides of a second triangle. What is the relationship between the angles?

71. ## Precalculus

The instruments with an aircraft show that it is headed east with an airspeed of 180 mph. After 2 hours, the aircraft is actually 375 miles east and 20 miles north of its starting point. Find the wind speed and its direction.

72. ## English

1. Give her a big hand. 2. Let's clap for her. 3. Put your hands together for her. (Are they all the same? Do you have some more similar expressions?) 4. Have a conversation with him. 5. Talk with him. 6. Speak with him. 7. Communicate with him. (Can we

73. ## Chemistry

indicate whether the following would increase decrease or have no effect on the solubility of copper (ii) carbonate (ksp - 2.5 x 10^-10) when compared to the solubility of water 1. dissolve it in an acidic solution 2. dissolve it in ammonia, forming a

74. ## Chemistry

The following ions contain three oxygen atoms: A) carbonate, sulfite, and nitrite B) sulfite, nitrate, and bromate C) sulfate, hypochlorite, and carbonate D) chlorate, iodate, and phosphite I know I can eliminate A and C.

75. ## math

List the real zeros and multiplicity of f(x)=-5(x^2+25)(x-3)^3

76. ## Math Statistics

They used an exponential regression model where the predictor is time in months and the response var is money measure in thousands of dollars. Alpha 4.2 and Beta is 1.03 Based on this model, how much money (in thousands) will he have after six months? I am

77. ## physics

A stone of mass 5kg is thrown vertically upwards with velocity 10ms final calculate the height.

78. ## math

Smokers. A life insurance company found that among its last 200 claims, there were six dozen smokers. What is the ratio of smokers to nonsmokers in this group ...

79. ## math

The first time the shuttle fires is at 7:44:35:16 on Friday morning and the next time it fires them is in the wee hours at 2:26:33:07 on Saturday morning. How much time has elapsed between one firing and the next? 7:44:35:16 means

80. ## Pre calc DUE TOMRROW

A ship is tied to two anchors on the shoreline. The anchor line on the left forms a 46 degree angle with the shoreline and is 350 feet long. The anchor line on the right forms a 63 degree angle with theshoreline and is 283 feet long. Find the exact

81. ## math

Find two fractions in lowest terms with unequal denominators whose difference is 2/7?

82. ## Physics

Hello so my question is an 85kg kangaroo acquires 2.2kJ of energy in jumping straight up and down from rest. How high does the kangaroo jump? My solution: When he's at rest Eg=2200J but in air Eg=0 Eg=mhh 2200=85(9.8)h 2.64m=h Looking at it now it doesn't

83. ## MATH 2

Elisabeti bikes from home to the grocery store and back to pick up in- gredients. On the way to the store, she averages 15 mph. Encumbered by groceries, she averages 10 mph on the way back. What is her average speed for the whole hour?

84. ## English

A mobile phone is not a protection rather a parent..... Can someone help me? I'm trying to say a mobile is not reliable we should look after our child more often?

85. ## Algebra

Factor: x^2+6x Please give step by step directions! Thanks!

86. ## English

1. The idiom get inside the authors head means to 2. Base word of accusation

87. ## physics

what is the work done in moving a positive charge 12UC across two points 6cm apart

88. ## Writing

What is the correct way to write this sentence? For the fourth-grade class hike, a lot if kids wore new hiking shoes, they were sturdy. Answer choices A For the fourth-grade class hike, there were a lot if kids they wore new hiking shoes that were sturdy.

89. ## Physics

A 55kg arrow is fired vertically upward at a speed of 42m/s. It rises upwards, then drops and lands on the ground. If it lodges itself 12cm in the ground, determine the average force that the ground exerts on the arrow This is what I've done but I don't

90. ## math

Is the function a polynomial function? Why or why not? If it is a polynomial function identify and label the leading term and constant term. Here are the functions f(x)=(2-x^4)/13 f(x)=x^3+9x-(1/x) it would be great if you could do everything step by step

91. ## computer

Write a program to let the user capture personal details: names, address, telephone, age, city, then display them. Use both “readline” and “showInputDialog” functions

92. ## calculus

Evaluate the integral. from 1 to 5 (ln(x))^2/x^3 dx.

93. ## English

Is this thesis correct? Heathcliff is a mysterious, antagonist, and feels betrayed by his only true love.

94. ## Math Statistics

I am confused I want to find the values of the equation of Yi=a + bxi. Time spent on twitter is the predictor variable and time spent working on twitter is the response The correlation between minutes spent on twitter and minutes spent working is -0.5 The

95. ## 5th grade math equation

I have tried everything to help my son and I can't figure it out. I am trying to get an end result of 38 out of the following equation. We have to add parentheses to make it equal 38 any help !!! 3+6*5+4/2-7

96. ## Heath

if you take insulin and you dont have diabetes what will happen to you will you die??

asked by Young Trippy Lil G
97. ## math

Applewood Supplies received a payment of \$864from Main Street Service on october 8 on an invoice of \$1999.58 dated september 29 with terms 4/10.how much does Main Street Service still owe on the invoice?

98. ## Fraction

henry is 1/3 his father's age and 1/4 his mother's age.their total age is 96 years.how old is henry's mother?

99. ## MATH

Morwen bikes around his neighborhood for an hour. He averages 15 mph for the first 40 minutes, but then he tires and averages 10 mph for the last 20 minutes. What is is his average speed for the whole hour?

100. ## MATHS

SIMPLIFY SIN RAISE TO POWER 4 MINUS COS RAISE TO POWER4 DIVIDED BY 1 MINUS 2SIN RAISE TO POWER 2

101. ## Personal and professional development

Evaluate approaches to self-managed learning?

102. ## Science

What is the name of experiment to show that a product obtained is a basic oxide 2Mgo+O2=2MgO

103. ## Linear Algebra

Hi, I really need help with these True/False questions: (a) If three vectors in R^3 are orthonormal then they form a basis in R^3. (b) If Q is square orthogonal matrix such that Q^2018 = I then Q^2017 = Q^T. (c) If B is square orthogonal matrix then B^−1

104. ## math

A problem whose quotient is 2/7

105. ## math

A company is making detergent out of soap and water. They made one batch that has 30% soap and another batch which is 60% soap. If they mix 600 liters of the first batch with 300 liters of the second batch, what percent of soap will be in the detergent?

106. ## GEOGRAPHY

ON A JOURNEY FROM NEWYORK TO LAGOS, TO CORRECT STANDARD TIME YOU MUST PUT THE HAND OF YOUR WATCH ......................

107. ## math

Find two binomials whose sum is 4x^2 - 4x - 15

108. ## physics

determine the center of mass for three particles(1.5, 2.5, 3.5) forming a equilateral triangle one side lenght of 135cm.

109. ## math

if X:Y =A:B show that Y:B=(X+Y):(A+B)

110. ## Math

How to get 44 using the digits in 2017. You can use +,-,×,÷,√,!,!!,exponents. Double digit numbers are allowed. You can use each digit only once.

111. ## Chemistry

If you had a 100 mL of 2.00 M HCl and you added 100 mL to it what is the final volume and final concentration? The volume would be 200ml, but would the concentration just stay the same?

112. ## Personal and professional development

evaluate approaches to self managed learning

113. ## math

the low tempuerture was 35 f. This was 13 f lowewr than the daytime high temputure.Write an equation to determin whete the high temperature was 48 f or 42 f

114. ## Maths

Please tell me the formula for volume of square based pyramid

115. ## AP physics

1000 kg car is going clockwise around a curve iwth radius of 30m. coefficient of frction=0.5 if the road was banded at an angle what would happen to the speed required or the radius of the curve? explain.