# Felix

Most popular questions and responses by Felix
1. ## chemistry

The reaction CHCL3(g)+CL2(g)_CCL4(g)+HCL(g) has the following rate law:Rate =k [CHCL3][CL2].If the concentration of CHCL3 is increased by a factor of five while the concentration of CL2 Is kept the same use a mathematical equation to show the factor by

2. ## Chemistry

Which contains more solute particles a 0.10 M aqueous solution of methanol (CH3OH) or a 0.10 M aqueous solution of table salt (NaCl)? Are we supposed to go M*L=moles*(6.022*10^23 solute particles)

3. ## chemistry

The equations for the heats of the formation of copper (I) oxide,Cu2O and copper(II) oxide,CuO are: 2Cu(s) +1/2 O2(g) CuO(s); ∆Hof =-166.7kj/mol Cu(s) +1/2 O(g) CuO(s); ∆Hof= -155.2kj/mol The first and second ionisation energies of copper are 750 and

4. ## Geometry

The second-largest state in the US is Texas, covering 268,580 square miles (including water). What is the approximate radius of a sphere with the same surface area as the area of Texas?

5. ## Chemistry

Calculate the molar concentration of uncomplexed Zn2+ (aq) in a solution that contains 0.22 mol of Zn(NH3)4 2+ per liter and 0.3109 M NH3 at equilibrium. Kf for Zn(NH3)4 2+ is 2.9 X 10^9 I started this way... (0.3109 + 4)2/0.22-x)= 2.9 X 10^9

6. ## math

the melt in your mouth chocolate factory sells three times as many mints as it sells almond bars.it sells half as many almond bars as it sells caramels.if it sells 3,750 cases of mints each month,how many caramels does it sell in one month

7. ## Chemistry (reposting)

In which of the following solution would CaC2O4 have the highest molar solubility? Please help. A) 0.01 M NaCl B) 0.01 M H2C2O4 C) 0.01 M Na2C2O4 D) 0.01 M NaHC2O4 E) 0.01 M HCl I think it is E because it is a strong acid and will completely dissociate

8. ## chemistry

If 50.0 g of sodium bicarbonate is reacted and 11.0 g of carbon dioxide is produced, what is the percent yield of carbon dioxide? 2NaHCO3 --> Na2CO3 + CO2 + H2O

9. ## algebra

Suppose that x varies directly as y ^2 and inversely as z, and x is 5 when y is 3 and z is 3. What is z when x is 10 and y is 3?

10. ## science

A solution contains 2 mEq/mL of KCL (Molecular weight 74.5). If a 20 mL ampule of this solution is diluted to 1 liter what is the percent strenght of the resulting solution?

11. ## math

the arcade has three pinball machines and five video games.If a person wants to play one pinball machine and one video game,how many different combinations of games could that person play?

12. ## algebra

The strength of a rectangular beam varies jointly as its width and the square of its depth. If the strength of a beam 10 inches wide by 20 inches deep is 3400 pounds per square inch, what is the strength of a beam 9 inches wide and 18 inches deep?

13. ## Math

Three towns A,B&C are located such that the distance between A&B is 15km and the distance between A&C is 90km, if the bearing of B from A is 075 and the bearing of C from A is 310. (a) draw the diagram (b) find the distance between B and C (c) find the

14. ## algebra

The volume V of a gas varies directly with the reciprocal of the pressure P. What happens to the volume of the gas if the pressure is tripled?

15. ## economics

A professor of economics gives multiple choice exams each semester. He curves the exams by giving the maximum possible points to the high score on the exam. For example, if a 50 question exam is worth 100 points and the top score in the class is 40, then

16. ## algebra

The frequency of oscillations of a pendulum varies inversely as the square root of the length of the pendulum. If a pendulum of length 25 feet oscillates with a frequency of 100 swings per minute, what would be the frequency of a pendulum of length 16

17. ## Chemistry

Calculate the molar concentration of uncomplexed Zn2+ (aq) in a solution that contains 0.22 mol of Zn(NH3)4 2+ per liter and 0.3109 M NH3 at equilibrium. Kf for Zn(NH3)4 2+ is 2.9 X 10^9 I started this way... (0.3109 + 4)2/0.22-x)= 2.9 X 10^9 I'm lost and

18. ## algebra

The strength of a rectangular beam varies jointly as its width and the square of its depth. If the strength of a beam 4 inches wide by 12 inches deep is 1800 pounds per square inch, what is the strength of a beam 5 inches wide and 12 inches deep?

19. ## network analysis

Point A and B are 0.1m apart. A Point charge of +3.0*10^-9 c is placed at A and a point charge at -1.0*10^-9c B. X is the point on the straight line between A and B where the electric potential is zero. calculate the distance AX

20. ## physics

A 8.72 kg particle moves from the origin to position C , having coordinates x = 2.04 m and y = 2.04 m as shown in Figure 1. A particle moving in a horizontal plane from the origin to position C experiences a friction force with constant magnitude 2.32 N.

21. ## english

possessive pronouns of martha katz's?

22. ## Math

A boat starts out at 20km/h in direction 30 degrees. However, the boat is blown off course by a 12km/h wind blowing from 80 degrees. What direction does the boat now travel in and how far does it travel in one hour?

23. ## Maths

In how many ways can a family of seven sit round a table if the mother and father must sit together?

24. ## math

Polk Elementary School has three classes for each grade level,kindergarten through fifth grade.If there is an average of 27 students per classroom,about how many students attend Polk Elementary School?

25. ## math

on monday 86 science fiction books were sold at a book sale this is 8 more than twice the amount sold on thursday how many science fiction books were sold on thursday

Shantel and Kwamie are planning to buy their first home. Although they are excited about the prospect of being homeowners, they are also a little frightened. A mortgage payment for the next 30 years sounds like a huge commitment. They visited a few new

27. ## math

write in scientific notation 35,000 and 982,000,000

28. ## computer

write a pseudocode to list any 25 integer and display both negative and positive

29. ## Chemistry

In which of the following solution would CaC2O4 have the highest molar solubility? Please help. A) 0.01 M NaCl B) 0.01 M H2C2O4 C) 0.01 M Na2C2O4 D) 0.01 M NaHC2O4 E) 0.01 M HCl I think it is E because it is a strong acid and will completely dissociate..

30. ## calculus

If g is a differentiable function such that g(x) is less than 0 for all real numbers x and if f'(x)=(x2-4)g(x), which of the following is true? f has a relative maximum at x=-2 and a relative minimum at x=2, f has a relative minimum at x=-2 and has a

31. ## Math

Eight students are running for three positions in the student council: president, vice president, and secretary. Which represents the total number of ways the three students can be selected if each student can be elected to only one position? A. 8x3 B.

32. ## Physics

how much heat is needed to vaporize a 400.0 g of liquid water at 310.0 K?

33. ## Math

Hello, I'm not sure how to do this question. Question A wheel with radius 5 cm is being pushed up a ramp at a rate of 4 cm per second. The ramp is 620 cm long, and 180 cm tall at the end. A point P is marked on the circle as shown How far does the wheel

34. ## Sociology

Is Ghana a classless society?

35. ## math

what are the three smallest 7 digit whole numbers that can be made using only the digits 4,3,0,9,2,8,and 5? Each digit must be used exactly one time in each number.

36. ## math

8(x+1/2)=2x+4

37. ## math

(from current question)14x+20y+negative17y+negative17x

38. ## math

5x+negative13x+6x+4x

39. ## science

How many years after voyage 2's launch was it before scientists could view its photographs of Uranus?

40. ## math

convert 15% into a fraction

41. ## math

the decimal for 15%

42. ## math

What the density of 16/2

43. ## math

square root of 64 and the square -64

44. ## math

what is the fraction form of 5.1

45. ## English

What has a lot of power and start with with a "s" and ends with a "l".

46. ## Math

The points P(-2,2) , Q(4,4) and R(5,2) are vertices of a Triangle. The perpendicular bisector of PQ and the line through P parallel to QR intersect at S. Find the coordinates of S.

(5x^-3)^2

48. ## English

(This homework question has been removed because it was copied directly from a test.)

49. ## Geometry

Explain whether the following statement is a valid definition: “A 30° angle is an acute angle.” Use the converse, biconditional, and at least one Euler diagram to support your answer.

50. ## math

a percent for 3/8

51. ## math

Mr.Garica's class is harvesting the school garden.The rectangular garden is twenty-five feet by fifteen feet.What is the area of the garden?

52. ## math

square roots to the nearest tenth of 42

53. ## math

find the prime factorization of 175

54. ## math

what is the scientfic notation of35,000and982,000,000

55. ## math

which of the following numbers are integers?8,1-1/2,0,-1,3.1

56. ## psychology

can printing technology as a course put food on your table

57. ## psychology of Education

How do a person become back? Or what is the main element disturbed in a person for him/her to be mad? And what causes madness.

58. ## Math Trig

I can't seem to get the right answer on my assignment. I keep on getting 276.403 and seem to get it wrong. Please help. Suppose that cot(θ)=−8.91 and 0∘≤θ

59. ## Physics

A tugboat pulls a ship with a constant horizontal force of 6000N and causes the ship to move through a harbor. The water exerts a constant drag force on the ship of 500N. How much work is done on the ship if it moves a distance of 4.0 km? Force is causing

60. ## math

how many flowers can be planted in a flower bed 13 ft long at 13 inches apart?

61. ## Physics

A plane has a max speed of 200 km/h. What is the maximum speed it can travel due west if there's a northwest wind at 50 km/h?

62. ## d,m,v

whats the volume of benzene.?

63. ## Math

Suppose you are comparing two numbers that are greater than 1,000. You want to find the smaller of the numbers. How many pairs of digits might you have to compare before you have your answer? Explain.

30=3c+2(3c-3

3(d+2)-d=16

66. ## math

(from current question)5x+negative13x+6x+4x simplify

67. ## math

14x+20y+negative17y+negative17x

68. ## math

what is the percent of 438 to 789

69. ## math

how you figure percents like percent of438 to 789

70. ## math

fraction for15%

71. ## math

i need the fraction for3/8

72. ## math

a percent for 0.9 decimal

73. ## math

a fraction for 0.9 decimal

74. ## math

find a fraction of 20%

75. ## science

why do you think that people choose to live in places where earthquakes are common

76. ## math

how many feet are in 261.32 yards

77. ## math

what is 1/3of 98

78. ## math

the melt in your mouth chocolate factory is a rectangular building.The distence across the front of the store is 98 yards.The distance from the front to the back one-third of this distance.If the owners paint a sign all the way around the outside of the

79. ## math

find the square root to the nearest tenth of 13

80. ## math

the two square roots of 9 are 3 and what

81. ## math

i need to complete a venn diagram using the numbers 20-35 please help me drawing a venn diagram.

82. ## math

what is the scientific notation for 1,890,000 and 7,426,000

83. ## math

i need to cmplete a venn digram of composite and odd using the numbers 20-35.

84. ## algebra

25 divided 0.76 in long formed

1. ## algebra

What is L?

posted on April 12, 2019
2. ## algebra

wait a sec but a still don't get it.

posted on April 11, 2019
3. ## algebra

posted on April 11, 2019
4. ## Chemistry

What is it?

posted on October 11, 2018
5. ## physics

487.3

posted on May 14, 2018
6. ## physics

-487.3

posted on May 14, 2018
7. ## psychology

yes write in details

posted on May 14, 2018
8. ## English

"My brother, sister, and I grew up in a very nature-friendly atmosphere." The comma after sister is sometimes optional, depending on who you talk to.

posted on March 15, 2018
9. ## Social Studies

Whatever you want to get a few wrong so that they don't think you're some type of Super human

posted on February 15, 2018
10. ## social studies plz help.

He has a good point there

posted on February 15, 2018
11. ## science (weather & climaate

There are 20 questions on the quiz two of them are essay questions and the first question is water condenses onto the grass in the early morning when the air is clean because also one of your other people have done this before but I think she needs help

posted on February 15, 2018
12. ## science

Can I get some help on this test

posted on February 15, 2018
13. ## Math

Is this correct

posted on February 12, 2018
14. ## Math

But there 8 questions you guys only put 7

posted on February 5, 2018
15. ## English

What are the answers for introducing the big question lesson 1 language arts 6 B unit 2 Rhythm and rhyme pretest

posted on January 28, 2018
16. ## english

steve

posted on January 11, 2018