# Questions Asked onAugust 27, 2010

1. ## Chemistry

A mixture of methane (CH4) and ethane (C2H6) of mass 13.43g is completely burned in oxygen. If the total mass of CO2 and H2O produced is 64.84 g, calculate the fraction of CH4 in the mixture. CH4 + C2H6 arrow CO2 + H2O 13.43g 64.84g Would I do

2. ## chemistry

A block of metal has a width of 3.2 cm, a length of 17.1 cm, and height of 3.7 cm. Its mass is 1.3 kg. Calculate the density of the metal.

3. ## Physics

One cubic meter (1.00 m^3) of aluminum has a mass of 2.70 multiplied by 10^3 kg, and the same volume of iron has a mass of 7.86 multiplied by 10^3 kg. Find the radius of a solid aluminum sphere that will balance a solid iron sphere of radius 1.40 cm on an

4. ## statistic

A lottery ticket has a grand prize of \$28 million. The probability of winning the grand prize is .000000023. Based on the expected value of the lottery ticket, would you pay \$1 for a ticket? Show your calculations and reasoning clearly.

5. ## Chemistry

Lysine, an essential amino acid in the human body, contains C,H,O, and N. In one experiment, the complete combustion of 2.175g of lysine gave 3.94g CO2 and 1.89g H2O. In a separate experiment, 1.873 g of lysine gave 0.436 g NH3. (a) Calculate the empirical

6. ## chemistry

How much ice (in grams) would have to melt to lower the temperature of 350 of water from 24 to 4? (Assume the density of water is 1.0 .)

7. ## math

A spherical snowball is melting in such a way that its diameter is decreasing at rate of 0.2 cm/min. At what rate is the volume of the snowball decreasing when the diameter is 12 cm. (Note the answer is a positive number).

8. ## Math

A student scored 65, 80, 74 on the first three tests during the term. What does the student need to score on the fourth test to ensure and an average score that is above 75?

9. ## CHEMISTRY

Explain why it is quantitatively not acceptable to titrate each of the vinegar samples with the NaOH titrant to the same dark pink endpoint?

10. ## physics

The 45-45-90 triangular prism shown in the figure has an index of refraction of 1.58, and is surrounded by air. A ray of light is incident on the left face at an angle of 51.0°. The point of incidence is high enough that the refracted ray hits the

11. ## chemistry

How much heat (in g ) is evolved in converting 1.00 of steam at 145.0 to ice at -45.0? The heat capacity of steam is 2.01 and of ice is 2.09 .

12. ## chemistry

A particular brand of gasoline has a density of 0.737 g/mL at 25 Celcius. How many grams of this gasoline would fill a 12.9 gal tank?

13. ## Geometry

Find the measurement of angle rsp if rst=5\2y and pst =(y+5)

14. ## college

During a particular thunderstorm, the electric potential difference between a cloud and the ground is Vcloud - Vground = 1.3 × 108 V, with the cloud being at the higher potential. What is the change in an electron's electric potential energy when the

15. ## AP Statistics (math)

Find a set of numbers that will satisfy the following conditions: - the median of a set of 20 numbers is 24. - the range is 42. - to the nearest whole number the mean is 24. - no more than three numbers are the same.

16. ## math

he circumference of a sphere was measured to be 78000 cm with a possible error of 050000 cm. Use linear approximation to estimate the maximum error in the calculated surface area.

17. ## English

I have done some extensive research on the various "-nyms", but I am still a bit unsure about the difference between EPONYM and TOPONYM. Am I correct, that an eponym is a person whom a place is named after, and a toponym a place named after a person or

18. ## precalc

According to an article by Thomas H. McMahon in the July 1975 issue of Scientific American, a treeâ€™s height varies directly with the radius of the base of its trunk. He expressed this relation using the formula h = kr^2/3 where k is a constant, h is

19. ## phy

A horse canters away from its trainer in a straight line, moving 140 m away in 16.0 s. It then turns abruptly and gallops halfway back in 5.0 s. (a) Calculate its average speed. (b) Calculate its average velocity for the entire trip, using "away from the

20. ## math

The altitude of a triangle is increasing at a rate of 1500 centimeters/minute while the area of the triangle is increasing at a rate of 1000 square centimeters/minute. At what rate is the base of the triangle changing when the altitude is 10000 centimeters

21. ## Statistic

6.18 Calculate each binomial probability: a. Fewer than 4 successes in 12 trials with a 10 percent chance of success. b. At least 3 successes in 7 trials with a 40 percent chance of success. c. At most 9 successes in 14 trials with a 60 percent chance of

22. ## algebra

Can someone show me the step to solving this equation because I am just not getting it. My teacher is confusing me, so I need someone else to explain it in a different uncomplicated way. y-1/x+3 = -3/4.Thanks so much you guys for the help.

23. ## algebra

I am having trouble solving this complex fraction. Can you adise me hoe to work it out? The denominator I am using is 4. Is that right? 1/x - 3/2 ---------- 3/4 + 1/x

24. ## Precalculus

Which of the following terms increases and then decreases periodically as t increases? A.)6cos(πt/26) B.) πt/26

25. ## LANGUAGE A

I have to write an editorial and I am thinking of using the word covetous for the title. is this an okay title? "Covetous Desire for Power" or can you suggest any other title i can use that relates to the need of having power

26. ## chemistry

The density of iron is 7.87 . What is the mass of a l* 4.00cm * 1.00 cm block of iron?

27. ## Geometry

How to trisect an angle

28. ## Algebra

Divide: (25b^3+5b^2+34b+29)/(5b+3)

Use the Distributive property to rewrite the expression and simplify. 6(y + 13)+ 21y

30. ## math

0.04 * 0.23= 23+4=27 _____0.27_____

31. ## ETH/125

I have to write a final over race and my community and I am having trouble with the introdutcion. The instructions say " Your thesis statement must address racial issues in your local community. Please make sure that you have a well-written introduction.

32. ## U.S. History

The worksheet says: Write the key policies of administration associated with the motto. I already asked but, key policies means what general policies were used or Acts passed? because for other motto's I couldn't find Acts passed. I'm still confused for

33. ## algebra homework

I am having some problem with solving a problem that the teacher gave to us. I ahving been working on it, but I just can't seem to get it. I keep getting the answer 2(y-2)/y+2. 3/y-3/2y+4

35. ## Finance

How much money must you pay into an account at the beginning of each of 11 years in order to have \$5,000 at the end of the 11th year? Assume that the account pays 8% per year, and round to the nearest \$1.

36. ## Math

I just googled 'what is a consecutive number'. I kind of understand what it means, but I need to know what two consecutive numbers add to 257. Hope you can help me!!! Thanks Mason

37. ## How Children Learn

according to Jean Piaget in what is all learning based?

38. ## CIS 105

• Write a 350- to 700-word paper in APA format that addresses the following items: Think about how your computer system compares to a state-of-the-art system. Identify the following components of your system: type of central processing unit (CPU) amounts

39. ## English

1. He lives in a Spanish-speaking country. 2. He lives in a Spanish-spoken country. 3. He is a Spanish-speaking person. 4. he is a Spanish-spoken person. (Are #1 and # 3 right? The others are incorrect. Am I right? Why is that, then?)

40. ## English

I don’t understand the last part ‘But not one man that I …….. as thanks his God with every note’ can you explain for me,and I want to know the main theme of the following poem, is that about a strong connection between nature and people .I have

41. ## math (college)

write a quadratic function needed to find the dimension of the rectangle with perimeter 100 having the maximum area. what are the dimensions of the rectangle with the maximum area?

42. ## math

the width of a rectangle is one half its length. the perimeter of the rectangle is 54cm. what are the width and length of the rectangle.

43. ## english

Never since the war begins has there been such a week of dramatic and world Shaking events as in the past seven days. Since last sunday when japan attack Americas outposts Without warning the week has been grim. It draw’s to a close with the hole world

44. ## Math - Equations of planes

Write a vector equation and scalar equation of the plane containing lines [x,y,z]= [-2,3,12]+s[-2,1,5] [x,y,z]= [1,-4,4]+t[-6,3,15]

45. ## science

What is the magnitude of the average acceleration of a skier who, starting from rest, reaches a speed of 7.1 m/s when going down a slope for 4.0 s?

46. ## Medical Billing and Coding

The investigational new drug (IND) application contains which of the following information?

47. ## math

x/3+2=x/6 In solving this problem do I divide 3 from both sides are what. I am a bit lost. please show me the steps so I can see if I am right or wrong in my calculations. Thanks you in advance.

48. ## math

find the area of the circle if the radius is 11 a-22mm^2 b-121mm^2 c-121pimm^2 d-132mm^2 e-132mm^2

State whether the expression is a polynomial. If it is, state the degree. a) 3x^2 - 7x + 2 = yes;3 b) 3x - 2/x = No c) sqrt2x^2 - 3pi = yes;2 sqrt2x + 5x = yes;1 Am I correct?

50. ## mat115

Please help with this math problem. The math question asks, "Identify the numerator and denominator of the fraction 3/8. Please let me know if I am correct? numerator is the 3 and te denominator is the 8. Is this a trick question? My professor want me to

51. ## math

Help please. Word problems. Alex has 15 friends. She has 36 chocolate cookies. She wants each friends to have 3 chocolate cookies. how many more cookies does she need?

52. ## US History

What is the New Deal's importance in conveying a major theme of our history at the time? Would it be that U.S. can recover from depression?

53. ## Roman Numerals

VI + I = IV Move only one I or V to make this equation true Juliet

54. ## US History

Are there any policies for Manifest Destiny? Because I couldn't find any except expansion on wiki.

55. ## Science

I'm suppose to make a graph but I'm confused on what would be the independent and dependent variables. So in the first table there is volume and pressure. And the second there is volume and pH. I think that in both that volume is independent, is that

56. ## Statistics

What is the difference between the null and alternative hypotheses statements in one-tailed and two-tailed tests? How can manufacturing companies use the standard normal distribution to determine quality control of their products?

57. ## Prejudice

The IAT test is how some sciologist use to calculate prejudice. What are other ways sociologist use measurement to calculate prejudice.

58. ## college

What is the mass of a 10.0 cm^3 cube of copper?

59. ## science

Which cavity consists of the cranial cavity and vertebral canal? the dorsal or the ventral?

60. ## Chemistry

The density of iron is 7.87 . What is the mass of a (variable l)* 4.00cm * 1.00 cm block of iron?

61. ## math

What is a simple way to find the radical form of a square root? i.e. the number 368

62. ## accounting

How do I find the net income for this company ,with this information? Beginning of year Total Assets were:\$810,000 Total liabilites were:\$324,000 End of year Total Assets were:\$1,296,000 Total liabiltes were:\$540,00 Capital stock of \$162,000 was issued

63. ## Statistic

6.16 Calculate each binomial probability: a. X = 2, n = 8, ð = .10 b. X = 1, n = 10, ð = .40 c. X = 3, n = 12, ð = .70 d. X = 5, n = 9, ð = .90

64. ## Chemistry

For this problem would I have to use proportions? Analysis of a metal chloride XCI3 shows that it contains 67.2 % CI by mass. Calculate the molar mass of X and identify the element. I tried using proportions: X+CI3/CI3 = ?/67.2 but then I had to find for

65. ## Brown

Find The Pattern: George, Thomas, Abe, Alexander...

66. ## math

find the circumferrence of a if it radius is 3mm. a-3pimm b-6pimm c-9pimm d-12pimm e-15pimm 6pimm

67. ## MATH

PLYWOOD WITH THE SURFACE MEASURES 8/9 SQUARE YARD IS CUT INTO SECTIONS EACH CONTAING 2/9 SQUARE YARDS. HOW MANY SECTIONS ARE THERE?

68. ## math

the sum of two number is 41 .one number is one less than twice the other find the larger of the two number a- 13 b- 14 c- 21 d- 27 e- 41

69. ## math

8+17.43+9.2 17.43+9.2=26.63 26.63+9.2=35.63 =35.63

70. ## science

should i heat material in a closed container or vessel

71. ## math

find 83% of 116 137.78

72. ## math

find 125% of 400 425

73. ## math

25% of 4,000 a-1/25 b-1/5 c-1/4 d-1/3 e-1/2

74. ## Math

Find three consecutive even integers whose sum is 60.

75. ## MATH

what is 0.43 written as a percent

76. ## PreCalc

for what value of y would the following be true? [(1/3)πk(3 + 1/4 y)^8/3] = 2[(1/3)πk(3^)8/3] (weird symbols are pi) A.)6.2 B.)6.1 C.) 2.0 D.) 3.6

77. ## Human service

When is it inappropriate to share a hunch?

do administrative regulations the force of law?

79. ## Anonymous

Hey, I am doing this online course on planning and I need a little help.

80. ## Child Developement andHuman Behavior

Which of the following is a chacteristic of middle childhood?

81. ## math

To play baseball, you throw the ball. The expression 3m where m is the number of minutes played can be used to find the calories burned by 100 pound person. Find the calories burned by a 100 pound person playing for 45 minutes.

82. ## US History

Rugged Indiviualism I couldn't find key policies for it except indiviualism.

83. ## finance

I am trying to figure out if sales forecasts and marketing forecasts are the same thing? Can you please help me?

84. ## math

The volume of a cone is three hundred cubic kilometers. If the radius of the base is 9 kilometers, what is the height of the cone? Use three point one four for pi. Show your work and round to the nearest tenth.

85. ## algebra

dont understand... find the target heart rate for an athlete age a. the chart reads: age target 20 160 21 159 22 158 23 157 24 156

86. ## COM 155

What would be the reaction of a reader if the topic sentences in an essay did not coincide with the supporting points?

It is a biological fact that a human being can live without food for a number of weeks. However, if deprived of water, a human being will die in approximately three days. Explain the large difference in time between these two facts.

88. ## science

what units would you use to measure the speed of a car on the highway?

89. ## physics

help with the websites that discuss the mechanism followed during the manufacturing of a bar magnet such that it has a north and south pole

90. ## college

• Create a SWOTT table summarizing your findings. Your environmental analysis should take into account, at a minimum, the following factors. For each factor, identify the one primary strength, weakness, opportunity, threat, and trend

91. ## bioloby

Briefly, what is large scale fermentation?

92. ## English

I am trying to say "the first episode will not be free" like people will have to pay to see the first episode. What is a proper way to get that across?

93. ## math

Solve: (a+4)/2 = (a + 4)/a