# Questions Asked onMay 27, 2008

1. ## Chemistry

The burning of methane in oxygen is a highly exothermic reaction. Yet a mixture of methane and oxygen gas can be kept indefinitely without any apparent change. Can someone give me an explanation behind this?

2. ## Math question - plz correct

Two airplanes leave an airport at the same time. One travels at 355km/h and the other at 450km/h. Two hrs later they are 800km apart. Find the angle between their courses. a^2 = b^2 + c^2 - 2bc Cos A 800^2= 450^2 + 355^2 - 2(450)(355) Cos A 640000= 202 500

3. ## Chemistry

What is the full net ionic equation for each reaction? do they form a precipitate or have a color change? CuSO4+AgNO3 CuSO4+BaCl2 CuSO4+Cu(NO3)2 CuSO4+Pb(NO3)2 CuSO4+KI CuSO4+Na2S2O3 AgNO3+BaCl2 AgNO3+Cu(NO3)2 AgNO3+Pb(NO3)2 AgNO3+KI AgNO3+Na2S2O3

4. ## Chemistry

What is the full net ionic equation for each reaction? do they form a precipitate or have a color change? CuSO4+AgNO3 CuSO4+BaCl2 CuSO4+Cu(NO3)2 CuSO4+Pb(NO3)2 CuSO4+KI CuSO4+Na2S2O3 AgNO3+BaCl2 AgNO3+Cu(NO3)2 AgNO3+Pb(NO3)2 AgNO3+KI AgNO3+Na2S2O3

5. ## Chemistry

Calculate the percent ionization of cyanic acid, Ka=2.0x10^-4, in a buffer soln that is .50M HCNO and .10M NaCNO. Answer is .20%. So,I know that NaCNO-->Na+ + CNO- so [CNO-]=.10M from ICF chart. and then HCNO H+ + CNO- where: [HCNO]= .5 and [CNO-]=.1 With

6. ## Chemistry

Captain Kirk, of the Starship Enterprise, has been told by his superiors that only a chemist can be trusted with the combination to the safe containing the dilithium crystals that power the ship. The combination is the pH of Solution A described below,

7. ## Macroeconomics

Peter Pundit, an economics reporter, states that the European Union (EU) is increasing its productivity very rapidly in all industries. He claims that this productivity advance is so rapid that output from the EU in these industries will soon exceed that

8. ## chem

how would i figure out this question? assume that 5.60 L of H2 at STP reacts with CuO according to the equation: CuO+H2 yields Cu+H2O a. how many moles of H2 react? b. how many moles of Cu are produced? c. how many grams of Cu are produced? i have no clue

9. ## Science and acrostic poems

HI! I'm making an acrostic poem about Apollo Eleven for my science class. I need help making one, so can someone give me a word for some of the letters?....(mostly the E's) A (astronauts) P O (outer space) L L (landing) O E L E V E N

10. ## Math (Data Management)

The student council is ordering pizza for their next meeting. There are 20 council members, 7 of whom are vegetarian. A committee of 3 will order 6 pizzas from a pizza shop that has a special price for large pizzas with up to three toppings. The shop

11. ## INB

What should Tom Sloane and U.S. Pharmaceutical of Korea do to improve collections from wholesalers?

12. ## Chemistry

Sacchirin is a monoprotic acid. If the pH of a 1.50x10^-2M solution of this acid is 5.53, what is the Ka of saccharin? (the answer is 5.8x10^-10) I know we're supposed to use the Henderson Hasselbach equation to solve for the [H+] from pH, but what's next?

13. ## chemistry

Captain Kirk, of the Starship Enterprise, has been told by his superiors that only a chemist can be trusted with the combination to the safe containing the dilithium crystals that power the ship. The combination is the pH of Solution A described below,

14. ## math

Alright, let's say you want to get from one point to another, in a 3D box. all points have an x, y and z coordinate. Point A has coordinates (25,30,5) while Point B has coordinates (50,26,18). The only given variable other than the coordinates is the speed

15. ## english

While there may be opposition from students and parents, dress codes should be enforced in schools as they encourage discipline among students. This is my thesis statement for an essay :dress codes in schools". how can I support it with compelling

16. ## Social Studies - - The Spread of Islam

Hello. I need to give three reasons for the spread of Islam. It'd be very helpful if someone could help me to find a good website. The ones I've found on Google haven't been all that helpful. Please and thank you. Eve

17. ## Algebra~Scary problem!

A launched rocket has an altitude, in meters, given by the polynomial h+vt-4.9t^2, where h is the height, in meters, from which the launch occurs, at the velocity v in meters per second, and the t is the number of seconds for which the rocket is airborne.

18. ## Anatomy

Is this the correct direction of blood flow through blood vessels Right atrium, right ventricle, pulmonary artery, pulmonary veins, left atrium, left ventricle.If not please help.

19. ## social studies

What was the main idea of the declaration of the rights of man and citizen?

20. ## Physics

At 08:00hrs a 2.7- m-long vertical stick in air casts a shadow 1.8 m long. If the same stick is placed at 08:00hrs in air in a flat bottomed pool of salt water half the height of the stick, how long is the shadow on the floor of the pool? (For this pool, n

21. ## Math

If Ann is 6 years older than her sister, Sue, and John is 5 years older than Ann, and the total of their ages is 41. Then how old is Sue?

22. ## English- 5

Directions: In each of the following sentences some part of the sentence or the entire sentence is underlined. Beneath each sentence you will find four ways of writing the underlined part. The first of these repeats the original, but the other three are

23. ## Physics

At 10:00hrs a 1.5- m-long vertical stick in air casts a shadow 1.4 m long. If the same stick is placed at 10:00hrs in air in a flat bottomed pool of salt water half the height of the stick, how long is the shadow on the floor of the pool? (For this pool, n

24. ## English - last part

Directions: In each of the sentences below, three portions are underlined and lettered. Read each sentence and decide whether any of the underlined parts contains a grammatical construction, a word use, or an instance of incorrect or omitted punctuation

25. ## french

les verbes suivis de l'infinitif We are learning about infinitifs following a verb, so its either nothing following, like aimer... the preposition "a", like chercher a and the preposition "de", like accepter de... I just want to know is there actually a

26. ## Math-Optimization

The material for the base of a box will cost three times as much as the material for the sides and top of the box. The box must have a volume of 200 meters cubed. Find the most efficient way to built this box.

27. ## math

if a square pyramid has a base side length of 6.3 m and a slant height of 4 m. find its surface area

28. ## scince maths

1- What volume of hydrogen gas at 273 K and 1 atm pressure will consumed in obtaining 2.16 gm of elemental born(atomic mass=10.8)from the reduction of born trichloride by hydrogen: A- 44.8 lit B-22.4 lit C- 89.6 lit D-67.2 lit

29. ## Economics

What product would be suitable to export to Hong Kong based solely on the location, climate, topography, and natural resources.

30. ## chemistry

A chemist wishes to determine the concentration of CrO4-2 ions electrochemically. A cell is constructed consisting of saturated calomel electrode (SCE) and a silver wire coated with Ag2CrO4. The SCE is composed of mercury in contact with a saturated

Approximate the area under each curve over the specified interval by using the indicated number of subintervals and evaluating the function at the right-hand endpoints of the subintervals. 1. f(x)=9-x^2 from x=1 to x=3; 4 subintervals. 2. f(x)=x^2 +x+ from

Question: What was your experience with the Center for Writing Excellence (CWE) in the past? In addition to the CWE, what other writing tools are available for revising a research paper? How can you become your own editor and look at your writing with a

33. ## english - II

The following is an outline for a paper on the separation of powers in the United States government. I. Theory and origin of the separation of powers II. The division of powers among the branches of government A. The executive branch B. The legislative

34. ## math

Running at a constant speed, Andrea covers 15 miles in 2.5 hrs. At this speed, how many minutes will it take her to run 2 miles? I know that I need to use conversion but i don't know how to convert it.

35. ## Government

What are basic features of the American concept of Democracy?

36. ## statistics

I can't seem to figure out the class interval for this grouped frequency distribution table: Highest Score=684 Lowest Score=56 & the professor has instructed us to use an interval size of 61 The starting point needs to be divisible by 61 due to convention.

37. ## Math

If Sally can paint a house in 4 hours, and John can paint the same house in 6 hours; how long will it take for both of them to paint the house together?

38. ## english - last

7) Surrounded by mountains and 7,400 feet above sea level, Mexico City (A) suffers from both (B) kinds of air pollution, the photochemical reaction of Los Angeles (C) or the thermal inversion of New York. A) suffers from B) kinds of air pollution C) or D)

39. ## The Science of Nutrition

Explain from a physiological standpoint, how eating disorders may lead to health problems. Give at least 3 examples.

40. ## Algebra

Factor completely: 3x squared-15x-72. A-> 3(x squared-5x-24) B-> (3x-24)(x+3) C-> 3(x+8)(x-3) D-> 3(x-8)(x+3) I got D. But could it be B?

41. ## Physics

I don't necessarily need an answer here... just a step in the right direction. If you drive into a wall at 5 m/sec, rebound at 1 m/sec, and make contact with the wall for .15 sec, with what force did the wall exert on the car? (mass = 220 kg) I can't

42. ## chemistry

adding 50 grams of NH4CL to water at 30 degrees celsius produces what kind of solution? (saturated, unsaturated, supersaturated?)

43. ## Science

need info about Niels Bohr's quantum theory????????

44. ## ETH 125/ Cultural diversity

Trends in immigration will continue to shape the face of the United States. What will this face look like in 2050?

45. ## ecology

what part of the plant absorbs the most water?? Is it the stem?

46. ## chemistry

how can you tell how many valence electrons family 3 (transition metals) have? im confused about this.

47. ## Algebra

Given Set H which contains all high school students in New York State who take Integrated Algevra. Set N contains all high school students who attend school in New York City. Which set represents H(upside-down U symbol)N?

48. ## english - revise please

When Congress passed the Federal ReserveAct of 1913, it gave the Federal Reserve Board afree hand in steering the economy. (2) The President, while charged with appointing the chair and board members, has no direct role to play in the Board’s policy

49. ## Marketing

what alternatives does XM Satellite Radio have

50. ## science

how does heat flow and movement of material within Earth move the continents,cause earthquakes and volcanic eruptions and create mountains

51. ## Chemistry

Where can I find a picture of the molecular orbital diagram for OH-?

52. ## Algebra

I am lost on how to divide this problem and why they won't offer examples in the book is mind boggling. 8x^4y^2/4x^7y^2

53. ## Algebra

I can't figure this out. (f^4/g^5)^7

54. ## Chem question?

I have a homework question that says, If you were dissolving table salt in a beaker of water, what would a saturated solution look like (macroscopically)?

55. ## SOCIAL STUDY

WHY SHOULD WE GO TO A FILED TRIP.

56. ## social studies

How did the growth of the railroads contribute to the decline of the native americans

57. ## math

Debbie goes to a diner famous for its express lunch menu. The menu has 5 appetizers, 3 soups, 7 entrees, 6 vegetables, and 4 desserts. How many different meals consisting of either an appetizr or a soup, one entree, one vegetable, and one dessert can

58. ## medical language

Choose only from the following approaches: microscopic-to-macroscopic, body directions and planes, body cavities, and quadrants and regions. Justify your reasoning.

59. ## physics

how do you find the volume of a pyrimid ?

60. ## Math

For all values x for which the terms are defined, fidnteh value(s) of k, 0

61. ## algebra

for a question like: car A was traveling at 25miles/hour for 3 hours. Car B was traveling at 30mph for 6 hours. When will they meet?

62. ## Social Studies

Has society become too organized? Does free will exsist? What role does chemical engineering play in society?

63. ## Scenario Question?

Dan is an employee at a regional mid-size computer company that has recently been sold to a larger, national computer manufacturing corporation. Dan is in charge of computer production orders, and because of this recent shift in ownership, his

64. ## I HAVE A MATH TEST TOMORROW HELPPP PLEASE!

im not sure how to find the first four terms of each arithmetic sequence tn=4+(n-1)(3) helpp me pleasee!

65. ## History

Please help me revise my History essay. The Inevitable Decision: America’s Entry into WWI Words are cheap. The infamous maxim has survived throughout history and its value has been demonstrated on a multitude of occasions. One situation that is

66. ## math

Matt and Anna are frequent fliers on Fast n Go Airplanes. They often fly between two cities that are a distance of 1680 miles apart. On one particular trip, they flew into the wind and the trip took 4 hours. the return trip with the wind behind them, only

67. ## MATH

Matt and Anna are frequent fliers on Fast n Go Airplanes. They often fly between two cities that are a distance of 1680 miles apart. On one particular trip, they flew into the wind and the trip took 4 hours. the return trip with the wind behind them, only

68. ## french

What is the differences between vivre and habiter?

69. ## Math

What is the volume of a sphere with a radius of 5 cm?

70. ## applied physics

if a DC motor uses a775 coulombs of charge in 15 seconds,how much current is produced

71. ## algbra 2

1. find the vertex of the parabola. 4x=y^2+6y-11 2. find the center and radius of this circle x^2+y^2-6x+4y-4=0

72. ## biology

What are two disadvantages of nuclear energy?

73. ## geometry

this is a regular pyramid, length is 8, base is 8, side is 4. formula = S=B+1/2Pl total surface area to the nearest tenth thanks guys!

74. ## chemistry

what are the three basic bonds. Ionic bond, covalent bond, ???? what is the third bond???

75. ## english - repost last

11) (A) No Chinese or Indian object--indeed, (B) no object of any kind from Asia--has been found in the Americas in archaeological levels (C) that date to pre-Columbian times. A) No Chinese B) no object of any kind C) that date to D) No error My answer is

76. ## algebra

DRT problem A bicyclist travels 20 miles per hour faster than a walker. The cyclist traveled 25 miles in the time it took the walker to walk 5 miles. Find their speeds.

asked by Help! Final Test Tom.
77. ## MS Access

How do I increase a column in access. My headings are on top of one another.

78. ## math 115

The following scores were recorded on a 200-point final examination: 193, 185, 163, 186, 192, 135, 158, 174, 188, 172, 168, 183, 195, 165, 183. (a) Find the mean final examination score. (b) Find the median final examination score. (c) Is the mean or

79. ## French

Whis the pronouncation difference between le and leur? Its really hard to tell.

80. ## Social studies

i have a d d and cant write and my friend whose name was "me" who was treated rudely said u all do the work so put a essay about greensboro sit ins thanks

81. ## Globalization

Identify potential domestic and international sources of financing for your global venture project. Ineed atleast 3 or 4 soucres.

82. ## Algebra

What is the relationshiip between the lines of these two equations?: 2x+3y=12 y=-2/3x-20 They are parallel, right?

83. ## social

what is Pluralism??

84. ## French

Hi, I am doing a summary of a french comic book, Les Schtroumpfs, Could anyone please help me with any errors I made in this section, grammar,tenses, etc “Les Schtroumpfs et le livre qui dit tout” est un album de 48 pages qui est dessiné par Pascal

85. ## english - 4

(1) In 1905 Einstein interpreted the “photoelectric effect” of light, a phenomenon that cannot be explained by the wave theory of light. (2) When a photon strikes an electron, the resulting action is analogous to the collision of billiard balls. (3)

86. ## Math Research

Can someone please tell me any websites that can explain the Sierpinski triangle and talks about its history, and formula? ThanKs!

87. ## Biology

What two steps are involved in the transfer of information from a gene to the final protein product?

88. ## Math

Find all x, -4pi < x < 6pi, such that [cos(x/3)]^4 + [sin(x/3)]^4 = 1 PLEASEEE HELPP! :(

89. ## Algebra

The last problem I have that I can't solve either and it's driving me nuts. Assume b,c ‚ 0 (4b^2c^3)^4

90. ## Social Studies

I need to research a person who was interesting and influential in the 1970's to write an article on... Any Ideas??? I can't decide... But i don't want to do a president

91. ## health

Hi, I was wondering if someone could help me with some research I'm doing?: Is it possible to have anemia and find out later that you have leukemia, because I read that anemia is a symptom of leukemia?

92. ## Physics

-An object whose height is 5.8 cm is at a distance of 9.5 cm from a spherical concave mirror. Its image is real and has a height of 9.2 cm. Calculate the radius of curvature of the mirror. I got 0.1165 m for my answer. -How far from the mirror is it

93. ## social studies

this terrorist organization is thought to be responsible for the attacks on new york city in 2001?

94. ## ETH 125/ Cultural Diversity

Trends in immigration will continue to shape the face of the United States. What will this face look like in 2050?

95. ## social studies

why should chimps be included in the definition of man?

96. ## languages

Complete the following matrix. For each body system, identify which body approach(es) might best be used to organize information. Choose only from the following approaches: microscopic-to-macroscopic, body directions and planes, body cavities, and

Approximate the area under each curve by evaluating te function at the left-hand endpoints of the subintervals. 1. f(x)=9-x^2 from x=1 to x=3; 4 subintervals. 2. f(x)=x^2 +x+ from x= -1 to x=1; 4 subintervals.

99. ## Math

Hi! I need help with the following math problem: A building has 4 columns, each of which is 15 ft high and has a circumference of 1 2/3 yards. 1. Find the lateral surface area of the 4 columns. 2. How much will it cost to paint the 4 columns if paint costs

What issues can arise in doing business globally?

101. ## SCIENCE

IF A GALLON OF POTSSIAM NITRATE AND 1000 POUNDS OF DLOMOTICLETROX ARE MIXED WHAT WILL HAPPEN. MY TEACHER GAVE US A BOOKLET FULL OF THESE QUESTIONS

102. ## math

4 sqrt(3) minus sqrt(64) plus 6 sqrt(27)

103. ## Science

Does anyone have the spectra for sulfur? In class we did this using a flame test, where we put the sulfur in a flame over a bunsen burner and used a spectra scope to find sulfur's spectra, but I seem to have lost this data. I've been looking on the web,

104. ## INFORMATION TECHNOLOGY HELP!!!!!!!!!!

How does Information Technology affect skills?

105. ## economics

describe the economic system most common to primitive societies

106. ## social studies

i have a project in which i have to make a board game and ask questions sort of like cranium... one of the question topics is emigrant vs immigrant and im not sure what to write for a question...

107. ## Gender Inequalities

Are there any inequalities between men and women in the armed forces?

108. ## health care

What is the socialization process for caregivers? What are the implications for patients?

109. ## Ted needs assistance

Could someone give a little more help to Ted with his anthropology question? It is really not about anthropology at all.

110. ## history

who was the 27th president?

111. ## ETH 125/ Cultural diversity

How can the country best prepare for the changing race and ethnicity of its current and futrue citizens?

112. ## Algebra

When constructing a box-and-whisker plot, the median is equivalent to which term? Is it the second or third quartile?

113. ## algebra

multiplying square roots

114. ## THANKS

Yah...this isn't really a question...but a thanks you post. I just a formula and i am sooooooo thankful!!! THANKS! :)

115. ## marketing

What are the decision facing XM satellite radio?

116. ## government

what is the job of the government

117. ## social studies

write castro essay here thanks

118. ## civics

what amendment number restricts the president in regards to treason, bribes, and being impeached?

119. ## social studies

how were churches and religious groups involved with immigration????

120. ## social studies

what are 3 reasons for emigrating in canada? (please give 3 answers making 2 of them wrong... kind of like multiple choice and specify)

121. ## chem

how many grams of zinc oxide are needed to produce 12 mol of zinc?

122. ## french

what are the forms of "er" verbs

123. ## french

what r the forms of er verbs