Questions Asked on
March 23, 2007

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
asked by Christopher 
physics please
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
asked by kimberley 
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
asked by jim 
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+] = 10pH or [H3O+] = antilog
asked by Jon 
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.
asked by jas20 
PLEASE HELP SOLVE RIDDLE
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
asked by tmyk 
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
asked by Christopher 
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 repost and let us know what you think. Then someone here will be happy to critique your
asked by Fran 
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
asked by Jon 
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.
asked by Tony 
(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
asked by Devon 
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
asked by Elizabeth 
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
asked by Christian 
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
asked by Aubrey 
algebra
A bicyclist rode into the country for 5hr. In returning her speed was 5 mi/h faster and the trip took 4 hr. what was her speed each way? What equation would I use to solve this problem i have no idea Let V be her speed going out, so V+5 will be her speed
asked by rob 
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 +
asked by Malik 
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
asked by keshia 
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.
asked by memo 
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,
asked by Vicky 
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)
asked by Charlene 
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
asked by Christine 
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
asked by mesha 
maths
what is 45,429,444 to the nearest hundredthousand? Hundred thousand digit... XX,YXX,XXX so would it be 454 hundred thousand?
asked by meisha 
science
what is a 18 leeter word for flow of charges through the circuit electrical currents ?
asked by memo 
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=ISO88591&q=Louis+XIV%2C+influence+on+Europe&btnG=Google+Search
asked by Dawn 
HISTORY PLEASE HELP FAST
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
asked by Jenna 
READING
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?
asked by Timothy 
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
asked by abi 
math
A=Bx5 B=C4 And what it the question here? what
asked by Ray 
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
asked by chris 
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
asked by jas20 
business and finance
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
asked by Carmela 
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
asked by sara 
chemistry
Calculate the hydronium ion consentration and the hydroxide concentration in blood in which the PH is 7.3. Hydronium = [H3O+] = 10pH or [H3O+] = antilog ( pH) and I got 1.00 x 10^7.3 for both concentrations is this correct? ABsolutely silly. You did not
asked by Jon 
psychology
what is an illusion? mention any three illusions and explain them http://hlavolamy.szm.sk/brainteasers/opticalillusions4.htm http://www.onelook.com/?w=illusion&ls=a So an illusion is something that people believe that is false. Some students have the
asked by gen 
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 repost and let us know what you
asked by Christine 
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
asked by Christine 
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
asked by joe 
science
a coomon mineral in solid form Quartz, among thousands of choices. Some are more common than others.
asked by nick 
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!
asked by kevin 
Help! Music..
I need to know to where i can get the karaoke version of "All or nothing" by OTOWN. I need it for a music presentation..[sigh] I have to sing it... plz help
asked by Cindy 
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
asked by Bryan 
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.
asked by Aubrey 
MATH!+ check please~ thanks in advance!
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
asked by conics!? 
Social Studies
They can be 25 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 makeup work from 10th grade .. Essays i need done: Charcter analysis of an epic hero(essay and sketch).
asked by John 
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
asked by Jamie 
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
asked by Sami 
algebra
Nine more than the sum of six minus a number and five equals twentyone 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=6x+5+9 would this be they way i write it so
asked by tom 
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 _ _
asked by Lizzy 
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
asked by Charlene 
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
asked by JC 
science
oky i have to make a tornadod simulator but what can i make it out of http://www.facethewind.com/tornsim/tornsim.html has some good suggstions
asked by cc