Questions Asked onMay 15, 2010

1. Chemistry

An airplane is pressurized to 650mm Hg, which is the atmospheric pressure at a ski resort at 13,000ft altitude. a. if air is 21% oxygen, what is the partial pressure of oxygen on the plane? b. If the partial pressure of oxygen drops below 100mm Hg,

2. maths

1. A cone justs fits inside a cylinder with volume 300cm^2. what is the volume of the cone?Give reasons for your answers.

3. French

is Monaco masculine or feminine? ie le Monaco or la Monaco

4. chemistry

The particles of which sample of LiCl(s) have the same average kinetic energy as the particles in a 2.0 mole sample of NH3(g) at 25 degrees celcius? a) 1.0 mole @ 75 degrees celcius b) 12.0 mole @ 50 degrees celcius c) 3.0 mole @ 25 degrees celcius d) 4.0

5. chemistry

permanganate ion oxidizes hydrogen peroxide to oxygen gas and Mn2+ in acidic solution balance this equation: MnO4- + H2O2 yield Mn2+ + O2 this is what i got 16H+ + 2MnO4- + 5H2O2 yield 2Mn2+ + 8H2O + 5O2 + 10H+ all the atoms and charges are balanced but

6. Accounting

Case 1. Steve and Linda Hom live in Bartlesville, Oklahoma. Two years ago, they visited Thailand. Linda, a professional chef, was impressed with the cooking methods and the spices used in the Thai food. Bartlesville does not have a Thai restaurant, and the

7. physics

Hi! could anyone help me to solve this problem please. Three point charges are located at the corners of an equilateral triangle as in the figure below. Find the magnitude and direction of the net electric force on the 1.60 µC charge. (A = 1.60 µC, B =

8. science

what is the current prouce by a potential difference of 240 volts through a resistance of 0.2 ohms?

9. Chemistry

I have a test on monday and I NEED to ace it in order to raise my grade > . < ldsfkjaslkf right now, acids and bases are killing me can somebody help me with these problems? A buffer solution is prepared by mixing the weak base ammonia (Kb=1.77x10^-5) with

10. ECONOMICS

A firm uses a single plant with costs C= 160 +16Q +.1Q2 and faces the price equation P= 96 – .4Q. a) Find the firm’s profit-maximizing price and quantity. What is the profit? b) The firm’s production manager claims that the firm’s average cost of

11. Probability

Two dice are rolled. Find the odds that the score on the dice is either 7 or 12. A) 7 : 29 B) 1 : 5 C) 1 : 1 D) 19 : 17 I am so lost it isn't funny. I do not know how to figure this out.

12. science

what resistance would produce a current of 120 amps from a 6-volt battery?

13. Chemistry

A sample of argon gas has a volume of 715 mL at a pressure of 1.34 atm and a temperature of 144 Celsius. What is the volume of the gas in milliliters when the pressure and temperature of the gas sample are changed to 622 mmHg and 321 K?

14. Algebra

55. Find the range of y = 2x + 1. a. all real numbers b. all positive numbers Not sure.. 67. Name the Property: -2 + (10+1) = (-2 + 10) + 1 a. Commutative Property of Multiplication b. Inverse property of addition c. Commutative Property of Addition d.

15. algebra

length and width of a rectangle A=198 in width =x length =x+7

16. chemistry

Using data in table below and S °(C2H6(g))= 229.5 J·mol-1·K-1, calculate ÄfS° for C2H6(g) in J·mol-1·K-1. Compound S °, J·mol-1·K-1 Compound S °, J·mol-1·K-1 C(s) 5.69 H2(g) 130.6 I am sorry , last time i did not show my working. thanks for

17. Chemistry

"An aqueous sodium borate solution is titrated to the second endpoint with 0.225 mol/l nitric acid in the presence of a suitable indicator. If an average of 12.6mL of titrant are required to reach the second endpoint for a 25.0 mL sample, what is the base

18. English

Can you please proofread this for me.. I'm really bad with grammar. Something that I take a lot of pride in is my passion of giving back to the community. My senior year of high school I was in Leadership, and with the help of my council members we devoted

19. chemistry

how many grams of oxygen is required to produce 2.0 kg of water??

20. math

Let’s suppose you throw a ball straight up with an initial speed of 50 feet per second from a height of 6 feet. a.Find the parametric equations that describe the motion of the ball as a function of time. b.How long is the ball in the air? c.Determine

21. Chemistry

my ap chem teacher has been absent for the past two weeks and part of the notes her sub gave us to copy says that In the equation HC2H3O2 + H20 C2H3O2(- charge) + H3O(+ charge) HC2H3O2 is an acid H2O is a base C2H3O2(- charge) is the conjugate base and

22. MATHS

The shape, a cube and a square based pyramid. Both shapes have the same base and the same height. Which expression represents the total volume of this shape? justify your answer. Note:that the pyramid is on top of the cube joined together.

23. ethics

Write a 1,750- to 2,450-word paper that formulates your personal code of ethics, using one of the major ethical frameworks as a guide. Include answers to the following questions: o In previous weeks, you examined the professional code of ethics for a field

24. Chemistry

The main component of nail polish remover is acetone, which has ∆Hvap= +31.3 kJ/mol. How many kJ of energy will be exchanged between your skina dn 48.9 mL of acetone which have been spilled on you? (density of acetone =0.79 g/cm^3)

25. stats

A researcher conducts a t test for dependent means in which it is predicted that there will be a decrease in unemployment from before to after a particular job-skills training program. The cutoff "t" needed is -1.8333. The standard deviation of the

26. finance

One year ago, Auto Land issued 10-year bonds at par. The bonds have a coupon rate of 6.5 percent and pay interest annually. Today, the market rate of interest on these bonds is 6.25 percent. How does today's price of this bond compare to the issue price

27. Managerial Economics

As vice president of sales for a rapidly growing company, you are grappling with the question of expanding the size of your direct sales force (from its current level of 60 national salespeople. You are considering hiring from 5 to 10 additional personnel

28. chemistry

Which of the following when added to water will cause a significant change in the pH of the solution? 1 NH4HSO4 2 (NH4)2SO4 3 Na2SO4 I believe the answer is 1 & 2. is that right.

29. economics

How goverment intervention can could improve societys welfare by changing peopple's incentives. What way is the market going wrong? Pollution from auto emissions has reached unhealthy levels

asked by Nicole Bellino
30. chemistry

A 0.26 M solution of a diprotic acid, itaconic acid, has an [H+] of 6.0 10-3 M. What is the value of K1? I got answer like 2.6 10-1 ,I am not realy sure if u help me C5H6O4--> C5H5O4 + H+ K1 is constant

31. Classroom Rubric

How many criteria should be included in an classroom rubric? Why?

32. stats:find the mean

please help! i know exactly how to find the mean but i am having a problem finding the midpoints. couldn't get them right :( salary employees 5,001- 10,000 == 16 10,001-15,000 == 15 15001-20,000 == 11 20,001-25,000 == 15 25,001-30,000 == 23

33. Derivative

What is the derivative of this y= 1/sin^2x - 2/sinx

34. Math

Assume that the weight loss for the first two months of a diet program has a uniform distrbiution over the interval 6 to 12 pounds. Find the probability that a person on this diet loses less than 10 pounds in the first two months. Not sure what to do. A)

35. Finance

Veggie Burgers, Inc., would like to maintain its cash account at a minimum level of \$246,400; but expect the standard deviation in net daily cash flows to be \$13,600; the effective annual rate on marketable securities to be 4.8 percent per year; and the

36. the power of art

If Gianiorenzo Bernini's Apollo and Daphne were to be moved from the Galleria Borghese in Rome where it now stands into the Ufizzi Gallery, the most ideal place to install it would be A anywhere in a gallery, provided it was with other 16th century marble

37. Chemistry

A container is filled with 8.0×10^21 O2 molecules at 9 Celsius and 815 mm Hg. What is the volume in mL of the container?

38. statistics

Ok, so I'm trying to do this for my exam review. I get some of it, but not all: An electric utility is examining the relationship between temperature and electricity use in its service region on warm days. The utility has bivariate data detailing the

39. Chemistry

Two of the questions my teacher put on the review sheet for our Acid/Base test are 1) what is the characteristic property of a buffer solution? and 2) what does a buffer solution contain? i think a buffer solution contains a weak acid and its conjugate

40. Rephrasing a sentence

How can I rephrase the following question: How do you measure students’ progress?

41. Chemistry

A solution of acetic acid having a concentration of about 0.2M is to be titrated using 0.200M NaOH. Select an indicator for the titration. what salt will the solution contain at the equivalence point? what is the approximate concentration of this salt at

42. Math

I am looking for a website or two so that I can help my daughter with her accounting homework. Usually my husband helps her, but he was just deployed to Iraq a few days ago. Can you help me locate some websites? I found a few, but I am not willing to pay

asked by Mrs. Winters
43. algebra

4x^3-5x^2-10x-3 divided by 4x+3

44. Philosophy/Social Ethics

Any guidance as to where find answers to the following questions or any related ones would be super. Would a market for procuring organs lead to commodification of the human body? What do we do when there are not enough organs to meet demand? Do people who

45. Geometry

Lines l and m have an intersection at point O and any reflection in l followed by a reflection in m results in a rotation about point O of 136 degrees. What is the acute angle between l and m? Thank you!!

46. Grammar and Composition

CAN SOMEONE PLEASE TAKE SOME TIME OUT TO DO THIS, IT'S REALLY IMPORTANT TO ME, PLEEASE! I'VE POSTED IT SO MANY TIMES. THANKS TO ANYONE WHO DOES IT! Desert Island Essay Pre-writing Sheet: Step 1: Choosing a Topic -Bahamas -Caribbean Islands -Adriatic

47. intermidate alegebra

I need help with two problem please. 4m^+20m+25= over the m is 2. w3+5w^-w=5 Please help me. over the w is three and 5w is 2. so could please help me this had to be done tonight.

48. relgious education

For my RE homework I need to write an essay about the differences, similarities between Christianity and Judaism. the teaching and beliefs of the two religions. anyone know of any sites which explain it simply. thanks any help would be great :)

49. history

Hitler's attacks on Austria and ______ tarted world war 2.

50. maths

can any one tell me wat are the topics for class 10th maths project for the year 2010-2011.

asked by prateek nayak
51. Algebra 2/trig

How would I calculate the following function value? tan = 29degrees 36feet

52. social studies

Find me a site for this sentence: a project in which canadians are providing aid in the area of health care or education. I can't seem to find one

53. Chemistry

What catalysts are used to manufacture sulfuric acid and nitric acid?

54. Web Design

Please advise: While changes in code would be a good reason for a redesign of one's web page, I am stuck on equally important reasons for a redesign.

I need to find the ROI and NPV of a \$35,000 software installation, which will reduce staff of one at \$10 per hour +18% benefits. Money cost are 7% and the system will become obsolete in three years. I have figured the ROI, but am not sure about the 7%

56. Social Studies

What are the two strongest and more advanced cultures in Asia?

57. Com 150

How does the writing process you read about in this class differ from the process you have used in the past?

58. algebra

x^2x-35 x(2x-35) x(x-35) check this for me thank for your help.

59. social

what is the physical environment at kajuraho at present?

60. Chemistry

Could you please explain what makes carbon so special and how its different formations affects its properties. I know its versatile but I don't get the rest. Thank you

61. Ms Sue-re

just to say a BIG thankyou to you i was abit confused but what you found was a huge help and helped to clear it up.you are a star! thanks again

62. Grade 8 Geometry

to calculate volume you use the formula V= area of b.s.(base area) x h(height) - How can I tell what face is the "base shape", especially with a triangular prism?

63. Chem

For a titration to be effective, what must be the relationship between the equivalence point and the endpoint?

64. Geography

can you help me with my 3-D Top map construction Project of a pear island

what does it means when they ask you give me a answear in units of multiplication and divisions word problems

Hello, I am wondering what exactly characterizes a polar molecule. Are all polar molecules charged? How do you tell if an uncharged molecule is polar? Thank you so much!

67. English Gr.11

If you have read the Handmaid's Tale by Margaret Atwood then in your opinion who do you think has a better life, the handmaid's or the jezebels? Explain why.

68. social studies

what 2 counties where influiential politicals have lived or currently living in florida,United states of america, north america? i am thinking madison and orange counties

69. algebra

(-3x+4)+(x tothe 2nd power +x-5)

70. social studies

I need to research on this sentence: Canadians are providing aid in the area of education. But I can't find a good website for this sentence. I've also tried typing this sentence on google but it's not giving me a good site. Please help me find a good site

71. Algebra

5-x/x^2-8x+15. can you show steps on how to solve this? thank you.

72. Math

how to find the formula for internet users per subscriber (average) if the internet subscribers (1000s) and internet users (1000s) are 11401 and 67510 respectively.

asked by JAndu Andu
73. MATH

CAN SOMEONE HELP WITH THE ONE MILLION DOLLAR PROJECT

asked by CINDY B
74. algebra

The projected number of men and women enrolled in US colleges, in millions, is modeled in the following formulas: Women: N=0.007x+4.1 Men: N=0.01x +3.9 N represents enrollment, in millions, x years after 1984 (I left this part out last posting). What is

75. psychology

• Write a 700- to 1050-word paper in APA format describing the five major structures of the brain and each structure’s function(s) in the human body. Be sure to include the following brain structures: o Myelencephalon o Metencephalon o Mesencephalon o

76. geology

How do fosils help in determining the relative age of strata? Are the three different localities around the same relative age?

77. relgious education

do muslims get baptised/christened. ive looked on some websites on one it says they do and on another it says they donot believe in it. im a bit confused. thanks

78. algebra

I am having a lot of difficulty trying to figure out how to put two math (word problems) questions into an expression. Can someone help me, I can do the rest from there. An explanation on the math formula would be great too. here's the two questions. 1.

79. algebra2

I am taking an online class, and cant understand why when I calculate ona ti84 plus an answer I get decimal answer and my teachers answer is sq root, is there something I am not doing on my calculator? How do I convert.