Questions Asked on
May 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?

    asked by Donna
  2. 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

    asked by Joe
  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

    asked by Joe
  4. 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

    asked by May
  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

    asked by howie
  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,

    asked by Tom
  7. 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

    asked by Alicia
  8. 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,

    asked by Tom
  9. 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

    asked by Jesse
  10. 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

    asked by Tiffany
  11. 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?

    asked by howie
  12. english-please revise

    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

    asked by rose- Ms. sue
  13. 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.

    asked by Sahara
  14. 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

    asked by Megan
  15. 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

    asked by Steve
  16. 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

    asked by Tom
  17. 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

    asked by brooke
  18. 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?

    asked by Hu
  19. INB

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

    asked by mary
  20. 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

    asked by rose- Ms. sue
  21. 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.

    asked by Megan
  22. 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

    asked by rose- Ms. sue
  23. 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?

    asked by Janah
  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

    asked by rose- Ms. sue
  25. 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

    asked by rohit
  26. SOCIAL STUDY

    WHY SHOULD WE GO TO A FILED TRIP.

    asked by MARK
  27. 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

    asked by BILLY
  28. 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.

    asked by derek
  29. Math

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

    asked by Gina
  30. 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!

    asked by Mandy
  31. The Science of Nutrition

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

    asked by greatdanelola
  32. 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.

    asked by Jin Kobeaux
  33. 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

    asked by Eve
  34. business calculus

    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

    asked by RAY
  35. 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?

    asked by jenny
  36. 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)

    asked by rose- Ms. sue
  37. 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

    asked by Taylor
  38. 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

    asked by Mark
  39. science

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

    asked by polly
  40. chemistry

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

    asked by mehrose
  41. MS Access

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

    asked by Pam
  42. Math

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

    asked by Megan
  43. 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

    asked by Mel
  44. French

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

    asked by par
  45. french

    What is the differences between vivre and habiter?

    asked by french
  46. 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

    asked by french
  47. algebra

    multiplying square roots

    asked by scott
  48. 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!

    asked by wigums
  49. chemistry

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

    asked by mehrose
  50. 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)

    asked by rose- Ms. sue
  51. 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.
  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

    asked by Casey
  53. Ted needs assistance

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

    asked by Brandon
  54. social studies

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

    asked by Renee
  55. 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)?

    asked by Lisa
  56. 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

    asked by Lindsay
  57. 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

    asked by Katie
  58. 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

    asked by MIKEYL
  59. 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

    asked by Lindsay
  60. social studies

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

    asked by Brandi
  61. 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?

    asked by Anonymous
  62. 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?

    asked by Anonymous
  63. Algebra

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

    asked by Anonymous
  64. 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)

    asked by anonymous
  65. 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...

    asked by anonymous
  66. french

    what r the forms of er verbs

    asked by bandit55751
  67. social

    what is Pluralism??

    asked by Anonymous
  68. business calculus

    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.

    asked by RAY
  69. 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

    asked by rose- Ms. sue
  70. 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

    asked by Sarah
  71. ecology

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

    asked by erica
  72. applied physics

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

    asked by Ashleigh
  73. Economics

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

    asked by Max
  74. Gender Inequalities

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

    asked by Katherine
  75. Social Studies

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

    asked by Ashten
  76. Marketing

    what alternatives does XM Satellite Radio have

    asked by China
  77. health care

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

    asked by Anonymous
  78. biology

    What are two disadvantages of nuclear energy?

    asked by carlie
  79. THANKS

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

    asked by Dawn
  80. Science

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

    asked by Sam
  81. 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

    asked by rose- Ms. sue
  82. 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

    asked by Ree
  83. Math Research

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

    asked by Ryoma
  84. 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!

    asked by Mandy
  85. 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

    asked by Brad
  86. Chemistry

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

    asked by Tom
  87. chem

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

    asked by Anonymous
  88. Medical

    a type of breathing the word is 6 letters long.Please Help

    asked by Eli
  89. Biology

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

    asked by Jahreta
  90. Algebra

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

    asked by Ashli
  91. 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

    asked by Sam
  92. 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

    asked by Ashli
  93. marketing

    What are the decision facing XM satellite radio?

    asked by China
  94. 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

    asked by Suomynona
  95. government

    what is the job of the government

    asked by kyle
  96. 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

    asked by Anonymous
  97. social studies

    write castro essay here thanks

    asked by me
  98. business

    What issues can arise in doing business globally?

    asked by jean
  99. 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

    asked by aaron
  100. Globalization

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

    asked by Todd
  101. social studies

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

    asked by mirian
  102. 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

    asked by AARON
  103. 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

    asked by derek
  104. social studys

    what year will the government release all the files or whatever about area 51 and 9-11-2001

    asked by edin
  105. civics

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

    asked by kate
  106. math

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

    asked by jaydee
  107. 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?

    asked by Jennifer
  108. Government

    What are basic features of the American concept of Democracy?

    asked by Rachael
  109. history

    who was the 27th president?

    asked by Amy
  110. 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?

    asked by Anonymous
  111. ETH 125/ Cultural diversity

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

    asked by Anonymous
  112. 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,

    asked by Maddie
  113. 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?

    asked by Anonymous
  114. chemistry

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

    asked by riley
  115. 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.

    asked by Leeza
  116. Algebra

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

    asked by Anonymous
  117. social studies

    why should chimps be included in the definition of man?

    asked by harriet
  118. medical language

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

    asked by sue
  119. social studies

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

    asked by anonymous
  120. french

    what are the forms of "er" verbs

    asked by bandit
  121. 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

    asked by sue
  122. INFORMATION TECHNOLOGY HELP!!!!!!!!!!

    How does Information Technology affect skills?

    asked by KERRY-ANN
  123. economics

    describe the economic system most common to primitive societies

    asked by lisa
  124. physics

    how do you find the volume of a pyrimid ?

    asked by bill
  125. Math

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

    asked by Nancy