Questions Asked on
May 23, 2008

  1. chemistry-please check my work

    Determine the mass of carbon monoxide that is produced when 45.6 g of methane CH4 react with 73.2 g of oxygen gas, O2. The products are CO and H2O. Please check my work: CH4 + 3O2 ---> 2CO + 2H20 nCH4=2.84 mol nO2=4.58 mol Limiting Reactant: 1 mol CH4/2.84

    asked by Sarah H
  2. chemistry

    calculate number of atoms in 4.67 mol of Ca(NO3)2 I got: 2.81 X 10^24 C atoms or should it be 28.11 x 10^23 C atoms? 5.62 X 10^24 N atoms or should it be 9.34 x 10^23 N atoms? 1.69 x 10^25 O atoms....but are you allowed to do ^25 or should it be 168.7 X

    asked by Sarah
  3. math (need help badly)

    the vertices of triangle DEF are D(5,12)and E(2,7) and F(8,4) Triangle DEF undergoes an enlargement with the centre ,O, and scale factors k.Its image is D`E`F` where D(5,12)arrow D`(7.5,18) a)How do i detremine the value of k

    asked by rita
  4. geography

    hi guys , anyone having trouble finding info about broughton airbus. i know people have asked before but i can`t find the answers to my questions. the question i`m finding hard is what alterations have been made to the factory? thanks for helping me . ive

    asked by nicole
  5. Electric Field between concentric cylinders

    I wanted the electric field between concentric cylinders, and got anexpression using Gauss' Law that considers only charge enclosed. Thus, there was no influence due to the outer cylinder. But, if we consider the limiting case of the inner cylinder having

    asked by Samantha Green
  6. math

    the position vectors of A and B relative to the origin are a and b repsectively The point P is on OA such that PA=2PA So my question is if B is the top of the triangle and O represent the left corner of the triangle and A the right corner, where would

    asked by angelina
  7. Economcis

    I need some help on the following question, thanks. e = euros Suppose quotes for the dollar-euro exchange rate, E$/e, are as follows: in New York $1.50 per euro, and in Tokyo $1.55 per euro. Describe how investors use arbitrage to take advantage of the

    asked by Wilde
  8. Physics

    Calculate the change in momentum in each of the following situations and state the direction of the change in momentum. a) A 4kg bowling ball strikes a stationary pin head-on at a speed of 3m/s. It continues to move in its original direction, but its speed

    asked by Alex
  9. geography

    hi guys , anyone having trouble finding info about broughton airbus. i know people have asked before but i can`t find the answers to my questions. the question i`m finding hard is what alterations have been made to the factory? thanks for helping me . ive

    asked by nicole
  10. Pre-Algebra

    Hi, Well, I have a test tomorrow and I was hoping that's someone could maybe help me? I don't understand probability... Here's a question I don't understand: Find the probability of tossing three coins and getting only two tails. Can anyone help?

    asked by Lily
  11. math

    how do i solve the equation for x and y y+4x=27 xy+x=40

    asked by ralph
  12. math

    On a vacation in cananda steve used his credit card to buy a camera for Can $250.00 trinirose: What is the value of the camera in Ja $. a)I know the asnwer is $18,125 Ja dollars b)steve has a credit limit of Ja $30,000.00.After buying the camera,how many

    asked by kelly
  13. chemistry - empirical formula

    write the empirical formula for each of the following molecular formulae" a)P4O10 b)C2H6 Confused as to what the diff.is b/w empirical and formula...have no idea how to answer these b/c they look like empirical formulas to me

    asked by Sarah
  14. psy info - help

    Ms. Sue, Could you tell me where I can get this information: Sternberg, eight general types of love. Thanks.

    asked by rose- Ms. sue
  15. Econ

    What kinds of information would you have needed to try to determine whether a company is a monopoly and why is this information important?

    asked by Tiffany
  16. math (vectors)

    calculate the length of AN if a{6} {2} and b= {1} {2} Is it 6^2+4^2 36+16=52 square root of 52+7.211

    asked by thomas
  17. history

    Who is roberto clemente?

    asked by Jake
  18. Chemistry - please help

    Hi, please check my work: In an experiment, 23.4 g of FES are added to excess oxygen and 16.5 g of FE2O3 are produced. The balanced equation is: 4FeS = 7O2 --> 2Fe2O3 + 2SO2 Calculate the % yield. My Answer: nFeS=23.4g/87.92 g/mol =0.266 mol 4mol FeS /

    asked by Sarah H
  19. Math

    Ok, I'm lost on this.... The equation D=1.2 gives the distance, D in miles that a person can see to the horizon from a height h in feet. Solve this equation for h

    asked by Sahara
  20. History

    What did people drink during the Renaissance? Did they drink water?

    asked by Danielle
  21. Reading

    Is there any flowers that rhymes with journal??????

    asked by Serena
  22. Algebra

    Solving quardratic equations using factoring. 2X^2+2X-4=0 The book says the answer is -2,1. I got the -2,1 but not in the order of -2,1. I used FOIL to solve. When I use -2,1 I don't can not solve. When I use 1,-2. I can solve. I am not clear.

    asked by G
  23. written communication

    Ironing out all wrinkles, the pants looked much more presentable

    asked by Anonymous
  24. science

    why is the electron the part of the atom that moves when an electric current flows?

    asked by jacob
  25. health

    what range of health care benefits are covered by Medicare and Medicaid?

    asked by Tim
  26. Social Studies

    Whos is Nelson Mandela? FW de Klerk? How did they impact apartheid?

    asked by Logan
  27. geography

    do you know which sites tell you about what happens to the parts when they go to the toulouse airbus factory? thanks Ms.Sue for you help i appreciate it.

    asked by nicole
  28. Chemistry - please help

    Hi, please check my work: In an experiment, 23.4 g of FES are added to excess oxygen and 16.5 g of FE2O3 are produced. The balanced equation is: 4FeS = 7O2 --> 2Fe2O3 + 2SO2 Calculate the % yield. My Answer: nFeS=23.4g/87.92 g/mol =0.266 mol 4mol FeS /

    asked by Sarah H
  29. Math

    What would be considered as a competitive interest rate and was is a compeititve interest rate?

    asked by Lina
  30. mathmetics

    x2-13x+30

    asked by roj
  31. public policy development

    I need to write a sentence outline showing how an agency creates goals and objectives.

    asked by Anonymous
  32. CRITICAL THINKING

    Why and how could you apply critical thinking when evaluating each of the following: • Articles • Advertising • Media • Conversations

    asked by LATASHA
  33. MAT 116

    solve 59X-81>3x+215

    asked by Shelly k
  34. maths

    x and y are two matrices x= {-2 0} and y {4 -1} {5 1} {3 7} evaluate x^2+y is the ans={8 -1} {18 8}

    asked by chantel
  35. education inequalities

    What are some inequalities in education between men and women?

    asked by Katherine
  36. religion

    Why did martin luther king responde the way he did to poeple

    asked by Nanci
  37. chemistry

    We're studying acids and bases; the question states that 50mL of 0.1M HNO3 solution is mixed with 25mL of 0.1M NaOH. What is the pH? I thought that I would use the Henderson-Hasselbach equation; but my answer does not match the one give in the solution.

    asked by micole
  38. french

    The use of the pronouns y and en is confusing, i know y is used for a place, but also with certain verbs followed by "a": pense a...for example. How do i know i don't use other direct or indirect object pronouns. Same for "en", when do i use it and when do

    asked by french
  39. calculus

    Find lim (with x¨‡ under it) (x^2-1)/x or state that the limit does not exist. I'm so lost with what to do with limits...I tried to simplify the expression to lim x+lim -1/x, but from there I'm pretty dumbfounded. If anybody could help me out I'd

    asked by Lisa
  40. M116

    59x - 81 > 3x + 215

    asked by shelly,k
  41. Biology

    How are the lungs and the liver in a frog different from those of a human? Thanks (other than being smaller)

    asked by Joe
  42. AED

    can anyone help me with my introduction to the fallowing please: Many teachers leave the profession after their first year as an educator. Examine programs that encourage individuals to stay in the profession of teaching and lower the attrition rate.How

    asked by dawn
  43. Reading

    Thanks if anybody can help me!! I need some words that rhymes with journal. Thanks!!!!!!!!!!!1

    asked by Serena
  44. french

    CAn someone proof read this? Nous sommes allées au Musée des Tissus et des Arts Décoratifs à onze heures. L’adresse a été 34, rue de la Charité, Lyon, France 69002. Nous avons vu des textiles du dix-huitième siècle et il y avait des tableaux par

    asked by kate
  45. algebra

    I am having a hard time solving my problem 2ã20 + 5 ã 80 - 7 ã5 Can someone please help me

    asked by Teena
  46. science

    Provide at least three freshwater and three ocean water resource challenges

    asked by Andrea
  47. mathematics: algebra;equations

    wuts the answer for -12 + 5u= -48

    asked by alisa
  48. algebra

    I am having a hard time solving my problem 2ã20 + 5 ã 80 - 7 ã5 Can someone please help me

    asked by Teena
  49. history

    When was the statue of zeus at olympia made? How was it made?

    asked by logan
  50. history

    How whas the statue of zues made? i cant find it on google or anything. i also prefere to not use wikipedia.

    asked by logan
  51. health care

    health care benefits covered by Medicare and Medicaid?

    asked by Laura
  52. Algebra

    The instruction manual on the industrial oven suggests your oven temperature will increase by 45 degrees Fahrenheit per minute. When the over is initially turned on, the temperature is 70 degrees Fahrenheit. What will the temperature of the oven be after 7

    asked by yolanda
  53. Economics

    How do you do the portfolio worth part 2?

    asked by Alayna
  54. History

    What was the type of currency during the renaissance?

    asked by Danielle
  55. Talent Shows

    In class I have to do a talent show. If I learn karate from my friend do YOU think that is okay for a talent show?

    asked by Anonymous
  56. medical

    What does ROS stand for?

    asked by cindy
  57. medical

    A physical or mechanical device used to remove health hazards form the workplace is called a _______ control.

    asked by cindy
  58. algebra

    The problem did not come out correctly here it is again 2 with the square root of 20 plus 5 with a square root of 80 minus 7 with a square root of 5

    asked by Teena
  59. Math

    Vivica washhes 6 cars in 60 minutes. How many minutes does it take Vivica to wash one car?

    asked by Nenny