# cc

Popular questions and responses by cc
1. ## chemistry

The molarity of urea in a solution prepared by dissolving 16 g of urea (MW 60.0g/mol) in 39 g of H2O is ______M. The density of the solution is 1.3 g/ml.

2. ## chemistry

A solution is prepared by dissolving 15.0 g of NH3 in 250.g of water. The density of the resulting solution is 0.974 g/ml. The mole fraction of NH3 in the solution is?

John & Jane are married. The probability that John watches a certain television show is .4. The probability that Jane watches the show is .5. The probability that John watches the show, given that Jane does, is .7. 1) find probability that both John & Jane

4. ## random

what kind of website is this? what is jiskha? Jiskha is the name given to the site by the man who runs the show here. His name is Leo. This is a help site with the emphasis on help. We try to help students do their homework. But we like to see what the

5. ## Physics

The driver in a car of total mass 800kg and which is travelling at 20m / s suddenly observes a stationary dog in his path 50m ahead . if the car brakes can exert a force of 2000N, what will likely happen

6. ## Algebra 2

A theater has 43 seats in the first row, 47 seats in the second, and 51 seats in the third row. How many seats are there in row 17

7. ## english

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

8. ## Math

Find the measure of the supplement of 58 degrees

9. ## chemistry

A 2.30 m solution of urea (CO(NH2)2; FW= 60.0) in water has a density of 1.14 g/mL. Calculate the percent mass of urea in this solution

10. ## math

Given the equation of a closed curve is x^2-2x+4y^2+16y+1=0.Find the coordinates of the two points where the lines tangent to the curve are vertical.

11. ## preventing injury

why is it important to get a medical check up prior to beginning a fitness program?

12. ## statistics

In which data set is there evidence of a strong nonlinear relationship between the two variables?

13. ## Math

11. Determine whether or not the relation is a function. {(-3, 6), (-2, 7), (-1, 8), (0, 9)} No Yes

14. ## Chem

Which direction will the following reaction in a 5.0 L flask proceed if Qp = 0.013? 2H2O(g) = 2H2(g) + O2(g) Kp = 1.6 x 10-5 Choose one answer. a. to the right because Q > Kp b. to the left because Q > Kp c. to the right because Q < Kp d. to the left

15. ## Chemistry

Calculate the molality of methanol in a solution prepared by dissolving 75.0 mL of methanol, CH3OH (d = 0.791 g/mL), in 150 g of ethanol, C2H5OH.

16. ## Chemistry

A 2.30 m solution of urea (CO(NH2)2; FW= 60.0) in water has a density of 1.14 g/mL. Calculate the percent mass of urea in this solution?

17. ## Math

Tony broke a larger array into 2 x 9 array and a 4 x 9 array. What did the larger array look like? Draw picture. Write a number sentence to show the relationship between the large array and the two smaller arrays.

18. ## Math

State the theorem or postulate that is related to the measures of the angles in each pair. Then find the angle measures. m∠3=(23x+11)°,m∠4=(14x+21)° Can you teach me this problem?? Please...

19. ## Math

A plumb bob is a weight hung at the end of a string, called a plumb line. The weight pulls the string down so that the plumb line is perfectly vertical. Suppose that the angle formed by the wall and the roof is 123° and the angle formed by the plumb line

20. ## biology

Aquatic organisms: A. have a waxy coating to prevent water loss B. may experience problems with water balance C. typically have a plentiful supply of nitrogen. D. never find light to be in short supply

21. ## science

Where can I find information on Energy reformation for a middle school student to understand?

22. ## chemistry

Three solutions are mixed together to form a single solution. One contains 0.2 mol \rm mol Pb(CH 3 COO) 2 \rm Pb(CH_3COO)_2, the second contains 0.1 mol \rm mol Na 2 S \rm Na_2S, and the third contains 0.1 mol \rm mol CaCl 2 \rm CaCl_2. Write the

23. ## Chemistry

A Gaseous mixture contains 4.08g of oxygen and 2.78g of Nitrogen a)What pressure is exerted by the mixture inside a 100.0ml metal container at 150C. b) what pressure is contributed by the oxygen? (please show steps)

24. ## math

. A box contains five blue, eight green, and three yellow marbles. If a marble is selected at random, what is the probability that it is not blue?

25. ## math

Phil had an unpaid balance of $1,854.50 on his credit card statement at the beginning of December. He made a payment of$45.00 during the month. If the interest rate on Phil's credit card was 2.5% per month on the unpaid balance, find the finance charge

26. ## Math

Find the coordinates of the x intercept 2x + y = -6

27. ## geometry

Given Isosceles trapezoid ABCD. AB = 3x - 4 and CD = x + 12. Find AB. Isosceles trapezoid A B C D is drawn. 2 8 16 20

28. ## physics

Before a collision, a 28 kg object is moving at +13 m/s. Find the impulse

29. ## Chem

A mixture is prepared with [CO] = 0.035, [Cl2] = 0.015, and [COCl2] = 0.95. It is known that Kc for the equilibrium is 1.2 x 10-3 at 400OC. Predict what will happen. Choose one answer. a. The reaction is at equilibrium so no net reaction occurs. b. The

30. ## Chem

At a particular temperature, Kc = 54 for the reaction H2(g) + I2 (g) 2 HI(g). One mole of HI is placed in a 3.0-L container. What would be the equilibrium concentration of HI?

31. ## Chem

At a particular temperature, Kc = 54 for the reaction If 1.0 mole of H2 and 1.0 mole of I2 are placed in a 5.0 L container, what would be the equilibrium concentration of HI?

32. ## math

if given ..,. y=4x^-4 if x triples what happens to y?

33. ## Chemistry

A 6.00 M H2SO4 solution has d = 1.34 g/mL. What is the mass percent of H2SO4 in this solution? Choose one answer. a. 56.1 b. 43.9 c. 37.0 d. 58.8 When we calculated yesterday the answer was not B. 43.9....I got it wrong and don't know why if the math was

34. ## chemistry

A 6.00 M H2SO4 solution has d = 1.34 g/mL. What is the mass percent of H2SO4 in this solution?

35. ## economics

the calculation of GDP would include?

36. ## Careers

Hello i am doing a matching paperwork and need help. Can you let me know if they are right or which ones wrong? Role of a nurse i have works closely with all health members to provide optimal care to patients. For doctor i have in charge of overall medical

37. ## Math

I need help. Name a pair of vertical angle.

38. ## Math

Sue has 8. Piece of sting each measure 6,5. How many inches of sting left

39. ## math

ms sue will you help me if my coordinates are A o,4 B 4,4 C 2,0 D 0,0 THE DILATION IS A' 0,2 B' 2,2 C' 2,0 D' 0,0 what is the scale factor?

40. ## History

How do i answer this question using the race method? you will discuss the ways in which the United States fought the Cold War economically, socially, and politically and which methods you believe were the most effective in combating communism.

41. ## Math

Carolina runs 3 1/2 miles in 22 1/4 Minutes. how many miles does she run per minute A.) 3/22 mike per minute B.) 62/221 mile per minute C.) 14/89 mike per minute D.) 4/39 mike per minute

42. ## chemistry

According to the following chemical equation: N2 + 3H2 → 2NH3 How many grams of hydrogen are needed to completely react with 28.0 grams of nitrogen?

43. ## Math

So, I have a question on a project that asks why you get a different answer when measuring the side of a hypotenuse versus using the Pythagorean Theorem. I did get different answers, but I just can't figure out why.

44. ## English Writing

Why you think it is important that she control her temper? How will learning this help in the future? If you, how do you answer this question??

45. ## Physical Education

I'm looking for Practice Methods for P.E. class. What is the best way to improve endurance and Muscular strength? I need some webpage （reference) Please help me------

46. ## Social Studies Religion

A Muslim organization wants to build a small mosque in the vicinity of the September 11 Memorial in New York City. There is public outrage from many citizens who do not want a Muslim religious site there. You must write a letter to the mayor of NYC

47. ## Science, Nature Science

Can you please give me three examples of things that photosynthesize that live in oceans?

48. ## Science, Nature Science

Can you give me three examples of things that photosynthesize that live in oceans?

49. ## Science,

Why don’t bodies of water freeze in the winter, even when ice or snow forms?

50. ## Science, Nature Science,ence, Nature Science,ence

How does water help us stay cool?

51. ## Science, Nature Science,

Give 3 examples of nutrients that WE NEED in our bodies that are soluble in water. Give 3 examples of gases that are soluble in water. Could you please help me these questions?

52. ## Social Studies Religion

A Muslim organization wants to build a small mosque in the vicinity of the September 11 Memorial in New York City. There is public outrage from many citizens who do not want a Muslim religious site there. You must write a letter to the mayor of NYC

53. ## Science , Earth , Waterce , Earth , Waterce

How can I answer this question? Draw an overall conclusion: how does water compare to other substances? Why do you think so? Please help me...

68. ## math

At a zoo, 1/3 of the animals are birds, 4/9 are mammals, and the rest are reptiles and amphibians. What fraction of animals at the zoo are reptiles and amphibians?

69. ## math algebra 1

The length of a rectangle is 2 m less than the diagonal and the width is 8 m less than the diagonal. If the area is 82 m2, how long is the diagonal?

71. ## Math

12m+12=6(3m+3) My answer is -6= -6 which is identity ??? Or is it null or empty??

72. ## Math

Fiona earns $15 for each lawn she mows. What is the inequality to find out how many lawns she must mow to earn at least$135. My answer 15m

73. ## Math

8x+5=4x-7 I put x=-3

74. ## science/physics

If a pendulum is not pushed, why does it not go as big when it swings back. Where does the lost PE go? ans. Since there is no force applied to the pendulum there is not enough Kinetic energy (energy of motion) to transform into potential energy to make it

75. ## physics/science

If a pendulum is not pushed, why does it not go as big when it swings back. Where does the lost PE go? ans. Since there is no force applied to the pendulum there is not enough Kinetic energy (energy of motion) to transform into potential energy to make it

76. ## math

In asheville north carolina in August the temperature is an even number less than 40 that has the same number of tens and ones Answer: Could it be 22 4 tens and 0 ones = 4 2 tens and 2 ones = 4

77. ## math

In Asheville North Carolina in August the temperature is an even number less than 40 that has the same number of tens and ones Ans: 34

78. ## vocabulary

Has the ability of human beings to produce new inventions (quenched, outstripped) our ability to use them wisely Ans... outstripped

79. ## vocabulary

As we returned to the dressing room after that terrible first half, the whole atmosphere seemed to be (pervaded, capsized) by defeat. Ans. capsized?? With eager students and able teachers, learning will (flourish, outstrip), even though the school building

80. ## criminal law

a bail bondsman fee is usually what percentage of the set bail

81. ## lang arts

List common nouns Anne Morrow Lindbergh soon shared his love of aviation. Answer: love & aviation question: Is shared a common noun also?

82. ## math

How do I find the 3rd side of a triangle if I am given 2 sides and there is no mention if it is a right triangle?

83. ## math

it is 10 degrees outside and the temperature is due to drop 16 degrees. what will be the temperature the

84. ## Physics Part 2

Rick's next shot isn't as good. She hits the cue ball with a velocity of 5.6 m/s and it hits the 4 ball. The cue ball bounces off at a 45 degree angle off it's original path at a speed of 3.5 m/s. What is the velocity of the 4 ball? ---So all i know is the

85. ## Physics Part 1

Rick is playing billiards and hits the cue ball. It makes contact with the 8 ball head on. If before the collision the cue ball was travelling at 2.4 m/s and after the collision the 8 ball was traveling at 2.13 m/s. How fast and in what direction is the

86. ## math

Alicia Eastman deposited $2,000 in a savings account at the Biltmore Bank paying 6% ordinary interest. How many years will it take for her investment to amount to$2,600?

how do i convert milligrams to grams- i am in fifth grade-easiest way please.

88. ## Algebra 2

The height h(t), in feet, of an airborne tee-shirt t seconds after begin launch can be approximated by h(t)= -15t^2+120t+10,0

89. ## MAT 116

A moon is about 210,000 miles from the planet it orbits. Write in scientific notation. If a rocket traveled at 3 x 10^4 miles per hour, how long would it take for it to reach the moon from the planet? Write the number 210,000 in scientific notation. 210,00

90. ## MAT

The recommanded weight range for a person who is 64 inches tall

91. ## beginning algebra

how to work out 0.00855 ÷ 0.09

99. ## math

RAMON PLANTED 3 ROWS OF SEEDS. EACH ROW HAD 8 SEEDS. THE SEEDS WERE 42 INCHES LONG. HOW FAR APART SHOULD HE PLANT THE SEEDS?