# Questions Asked onMarch 23, 2007

1. ## Chem

A solution is made by mixing 50.0 g C3H6O and 50.0 g of CH3OH. What is the vapor pressure of this solution at 25 degrees C? What is the composition of the vapor expressed as a mole fraction? Assume ideal solution and gas behavior. (At 25 degrees C the

2. ## Chemistry

this makes absolutley no sense I plug all this into my calculator but I get different results. The hydronium ion concentration can be found from the pH by the reverse of the mathematical operation employed to find the pH. [H3O+] = 10-pH or [H3O+] = antilog

3. ## psychology

what is an illusion? mention any three illusions and explain them http://hlavolamy.szm.sk/brainteasers/optical-illusions-4.htm http://www.onelook.com/?w=illusion&ls=a So an illusion is something that people believe that is false. Some students have the

4. ## mass communication

who is target audience of sex and the city? Please note that we don't do students' homework for them. Once YOU have come up with a response to YOUR questions, please re-post and let us know what you think. Then someone here will be happy to critique your

5. ## Chemistry

when pure sodium hydroxide is dissolved in water , heat is evolved in a laboratory experiment measure a molar heat of solution of sodium hydroxide the following procedure was followed. to a calorimeter containing 300g of water at 20.0 C and 10.65g of NaOH

6. ## algebra1

Find to consecutive integers that the sum of 3 times the first integer and 6 times the second integer is 24. Define the variabls you use. If somebody can show me how to work this out, I will be very greatful for the help? consecutive integers, n, n+1 3n +

7. ## science

a coomon mineral in solid form Quartz, among thousands of choices. Some are more common than others.

8. ## algebra

Nine more than the sum of six minus a number and five equals twenty-one I am sorry I hit the wrong button and it sent it before i finished can some tell me if i have writen this problem right i think it goes 21=6-x+5+9 would this be they way i write it so

9. ## Biology

What are code pieces of nucleic acids? (this is for a crossword puzzle and strangely polypeptides does not fit!) the spaces are: _ _ _ _ e _ _ _ _ _ _ What are the varients of a gene? (it's not diversity like I thought it should be) the spaces are _ i _ _

10. ## chemistry

If the molecular weight of a protein is given as 90,000 are the units g/mol or simply g? I have seen mixed answers to this question. It will be 90,000 g/mol since 1 mol will have a mass of 90,000. But many simply drop the the mol and say the molecular

11. ## Math

Rose's garden is in the shape of a trapezoid. If the height of the trapezoid is 16m, one base is 20m and the area is 224m2, what is the length of the other base? The area of a trapezoid is: A= (1/2) h (b1 + b2) ...where h = height and b1, b2 are the bases.

12. ## hum 130

I need to find at least two effects organized religion has had on society, and provide examples from past or present. Have you considered laws? Such as marriage, divorce? Have you considered social organization, such as family activities at gatherings,

13. ## phhysics

picture in your mind a block that slides without friction down a ramp that is inclined at an angle (q) above the horizontal. Initially the block is at rest a distance (s) in meters (measured along the plane) from the bottom. Calculate the time (in seconds)

14. ## math,algebra

I need help if someone can show me the steps to these 2 problems. Problem #1 Use the properties for radicals to simplify each of the following expressions. Assume that all variables represent positive real numbers. radical and inside of the radical theres

15. ## chemistry

Calculate the hydronium ion consentration and the hydroxide concentration in blood in which the PH is 7.3. Hydronium = [H3O+] = 10-pH or [H3O+] = antilog (- pH) and I got 1.00 x 10^7.3 for both concentrations is this correct? ABsolutely silly. You did not

16. ## math.help

am i correct on this radical (-121) the radicand is negative 121 cannot be evaluated. The square root of -121 is the imaginary number 11i, where "i" is the symbol for the square root of -1. Actually, -11i is also an answer.

17. ## Mass Communication

The act of communication is best understood as one that has social implications.Explain briefly Please note that we don't do students' homework for them. Once YOU have come up with a response to YOUR questions, please re-post and let us know what you

18. ## Mass Communication

what is meant by persuasive communication?Explain breifly I've clicked through a few and have only seen what seem to be a lot of homework questions. But I have not understood what your confusion is on many of them. Do you now understand what they are

19. ## Micro Economics

Briefly explain the following: (a)Economic cost and accounting cost. (b)Free market economy and mixed economy. (c)Marginal utility theory and indifference curves analysis. Please note that we don't do students' homework for them. Once YOU have come up with

I jump I run, I am one of four, you can find me hanging around your door. What am I? Please help I'm usually great at answering these. But I am lost on this one. PLEASE tell us if you get the answer :) what weighs a lot going forward but not backwards? Two

21. ## algebra1

could some possibliy go through the steps in sovling this problem for me? x/7+5=9 subtract five from each side. Then, multiply both sides by seven

22. ## algebra1

I need some help in sovling this problem. x+3y=9 show me how to solve for y. subtract x from each side. Then, divdide both sides by 3

23. ## maths

what is 45,429,444 to the nearest hundred-thousand? Hundred thousand digit... XX,YXX,XXX so would it be 454 hundred thousand?

An eletronics store wants to order at least 3 times as many DVD players as VHS players. Write an inequality expressing this relationship. Define the variable you use. I have no idea on how to solve this. Can somebody show me how to solve this problem? DVD

25. ## algebra1

How do I solve this x/3=-4? multiply both sides by 3 Please stop posting under sundry names. You are doing yourself no good. What do you mean by sundry names? What's up with you telling me this because I don't know what you mean? My name is Kevin Shaw!

26. ## algebra1

What steps do I take in solving this problem? It is about graphing inequalities. 10x+4¡Ý9x+17 put the equation in the form of y ? x + constant. ? means greater than or less than. That is the first step. You are getting no more help until you start

27. ## Help! Music..

I need to know to where i can get the karaoke version of "All or nothing" by O-TOWN. I need it for a music presentation..[sigh] I have to sing it... plz help

28. ## science

what is a 18 leeter word for flow of charges through the circuit electrical currents ?

29. ## science

what metal is in the form of a form of a thread or rod Many many metals can be in that form. You might try tungsten (also called wolfram) since that metal is so ductile.

30. ## history

What was the influence of King Louis XIV and Versailles upon other monarchs in Europe? There are a number of excellent articles on this page: http://www.google.com/search?hl=en&ie=ISO-8859-1&q=Louis+XIV%2C+influence+on+Europe&btnG=Google+Search

31. ## Career

can one define postive mental attitude This is an opinion question, I am assuming. What do you think? If you still need help developing your ideas, just ask. This is as good a definition as any. http://en.wikipedia.org/wiki/Positive_mental_attitude My

32. ## Spanish 1

Conjugate the following verbs in Spanish- 1. Estudiar- singular and plural 2. correr- singular and plural 3. vivir- singular and plural This site will help you with that: http://www.spaleon.com/conj.php Thank you for using the Jiskha Homework Help Forum.

33. ## Spanish 1

Match the verbs and the subjects- 1. Maria(estudiar) 2.Nosotros(comer) 3. Yo(ser): el(ser) 4. El y ella no (vivir) 5. Tu (estar) Are there any pictures or sentences that go along with the subjects? All of these subjects could go with any verb. This site

34. ## (Life)

What is a good conflict resolution technique for employees? Talk together. Work it out. Compromise. If you cannot do this, consult your employer. Are you talking about conflict resolution among employees or between employees and employers? Elizabeth's

the equation 2x^2+ cy^2+Dx+Ey+f= 0 represent a conic. state the value(s) of C for which each of the following are possible: A circle: My answer: c= 2 an ellipse: My answer: c>0, cant equal 2 Parabola: My answer:c=0 a hyperbola: My answer: c

I need a fairly brief explanation of the Inquisition. All I know is that it has something to do with killing "heretics" whatever they are. Try typing it into Wikipedia. The first paragraph in the article should give you a brief explanation of the

37. ## history

When did people stop using parchment and start using paper? These sites will give you the history of paper: (Broken Link Removed) http://inventors.about.com/library/inventors/blpapermaking.htm I'm not really sure as to the answer. You see, I'm writing a

38. ## Social Studies

They can be 2-5 paragraph essays, not looking for excellent work just easy essays to turn in...if i don't do these i dnt pass my senior year, this is make-up work from 10th grade .. Essays i need done: -Charcter analysis of an epic hero(essay and sketch).

A series of pulse of amplitude 0.15 m are sent down a string that is attached to a post at one end. The pulses are reflected at the post and travel back along the string without loss of amplitude. What is the amplitude at a point on the string where two

I need help with one less letter than the previous word. (its in a sentence.) Please explain more about your assignment. Are you trying to make a new word from a previous word?

41. ## maths

4x+3y=21 What is your question? You have simply stated the equation of a straight line. what is a prime factorazation?> expressing a number in terms of its Prime factors eg. 126 = 2*3*3*7 all the factors are prime numbers How does this relate to the first

42. ## personal finance

Sue and Tom Wright are assistant professors at the local university. They each take home about \$40,000 per year after taxes. Sue is 37 years of age, and Tom is 35. Their two children, Mike and Karen are 13 and 11. Were either one to die, they estimate that

43. ## personal finance

Donna and Sherman Terrel are preparing a budget for 2003. Donna is a systems analyst with an airplane manufacturer, and Sherman is working on a master's degree in educational psychology. The Terrels do not have any children or other dependents. Donna

44. ## math

A=Bx5 B=C-4 And what it the question here? what

45. ## Chemistry

At saturation 1.5 x 10^-4 moles caF2 have dissolved in 1L of water. What is Ksp for CaF2 at this temperature? CaF2(s) ==> Ca^2+ + 2F^- Ksp = (Ca^2+)(F^-)^2 (Ca^2+) = 1.5 x 10^-4 mols/L (F^-) = 3.0 x 10^-4 mols/L. Plug into Ksp and solve. Post your work if

46. ## criminology

Why is it important to consider inversely the nexus between theory and policy? It is far more important to consider writing skills and clarity of communication. Can you possibly explain the meaning of consider inversely the nexus? Hmmm. "... consider

47. ## Chem

I'm having a lot of trouble with a simple problem. I have a 3.0% by man solution of H2O2 in H2O. The density of thr solution is 1.0 g/mL. I need to find the molarity. How do I do this? So far I have: 3.0g H2O2 x 1 mol/34.02 g= .0881 mol I'm not sure where

48. ## RE: phhysics

Posted by Charlene on Friday, March 23, 2007 at 3:00am. picture in your mind a block that slides without friction down a ramp that is inclined at an angle (q) above the horizontal. Initially the block is at rest a distance (s) in meters (measured along the

49. ## algebra help

I am really confused on this question can some one help me out please the length of a rectangular playing field is 5 ft less than twice its width If the perimeter of the playing field is 230 ft. find the length and width of the field. I believe i am

50. ## chem

this is my question Calculate the hydronium ion consentration and the hydroxide concentration in blood in which the PH is 7.3. I don't have invlog on my calculator so I hit log(7.3)= .863 for hydronium. Is this dumb for me to do? That is dumb for you to