Questions Asked on
April 28, 2007

Chem 2
what is the solubility of silver carbonate in water in 25 degrees celcius if Ksp=8.4X1012? i don't know what to do Write the equation. Ag2CO3(s) ==> 2Ag^+ + CO3^= Ksp = (Ag^+2)(CO3^=) Let x = solubility of Ag2CO3. At equilibrium,(Ag^+) = 2x; (CO3^=) = x.
asked by joe 
chemistry
how would you begin this question? An empty 15.0 L cylinder, .500 moles of gaseous PCl5 are added and allowed to reach equilibrium. The concentration of PCl3 is found to be .0220M. (Temp at 375K) PCl3(g) + Cl2(g) > PCl5(g) i need to fine how many moles
asked by Anonymous 
physics
The range of human hearing is roughly from twenty hertz to twenty kilohertz. Based on these limits and a value of 350 m/s for the speed of sound, what are the lengths of the longest and shortest pipes (open at both ends and producing sound at their
asked by Cavin 
chem
Kw = KaKb. With this equation you can convert any Ka to Kb and the reverse. Codeine (Cod), a powerful and addictive painkiller, is a weak base. a) Write a reaction to show its basic nature in water. Represent the codeine molecule with Cod. b) The Ka for
asked by DrBob222 
chem
Section: Ionization expressions, Weak Bases Using the equilibrium constants listed in your book, arrange the following .1 M aqueous solutions in order of increasing pH. a)NaNO2 b)HCl c)NaF d)Zn(H2O)3(OH)(NO3) Here's what I have so far: a) NaNO2 > Na+ +
asked by Chris 
Economics
4. Which of the following statements is false? a. Keynes believed that the level of investment depends on more than the interest rate. b.Saving is the difference between disposable income and consumption. c. Keynes believed that saving is more responsive
asked by Sarah 
economics
what are three main goals sought by policymakers in the economy? please help me one of my posts has a question I need checked and the other I don't know. I don't know what you guys are thinking.I really need help im not some kid on here scrapping for
asked by Jon 
algenra
Anna has 12 bills in her wallet, some $5 and some $10. The total value of the bills is $100. How many of each bill does Anna have? is this how i do this? x+y=12 5x+10y=100 y=12x 5x+10(12x) 5x+12010x=100 5x10x=25x=20 x4 y8 Looks good to me. Matt
asked by Anonymous 
soacial studies
The journals of early travelers such as Ibn Battuta of Morocco, Zheng He of China, and Mansa Musa of Mali are examples of 1.primary sources describing observations of the travelers 2.works of fiction intended to describe the adventures of the travelers
asked by Parth 
CHEm
Which term best describes the measure of the increase in the concentration of a product per unit time? activation energy, kinectics, reaction reaction rate, reaction time im stuck i think its activation energy can someone confirm this or let me know what
asked by sue 
grammar
What is the difference inbetween third person omniscient and third person limited The third person omniscient knows and writes about everyone's thoughts. The third person limited only writes about the thoughts of one character.
asked by Anonymous 
english
what is isolating morphology? What is agglutinating morphology? thanks a lot! =) Variations in the study of word structure: http://www.lang.ltsn.ac.uk/resources/goodpractice.aspx?resourceid=319 =)
asked by jules 
math
andys average driving speed for a 4hour trip was 45 miles per hour. during the first 3 hours he drove 40 miles per hour. what was his average speed for the last hour of his trip? The trip length was 4 x 45 = 180 miles. He went 3x40 = 120 the first three
asked by anonymous 
math
Hi. Please help me with this?: Suppose you start a home business typing technical research papers for college students. You must spend $3500 to replace your computer system. Then you estimate the cost of typing each page will be $.02. Write a rational
asked by Harry 
humanities
What is meant by archaic brace in relation to ancient Greek and Roman civilizations? That can mean either the Archic historical period, or it can mean a brace in the center of a shield which the Soldiers put there arm through. If you can give me more
asked by ryan 
English
Check out this site. http://www.cultureandrecreation.gov.au/articles/poetry/ Dear all, I need a poem that will help me answer the question "Is Australia seen as a Follower or a Leader?" I am yet to find 1 useful poem on that site... Maybe you should write
asked by Ms. Sue 
math
two airplanes left the same airport traveling in opposite direction. if one airplane averages 400 miles per hour and the other airplane averages 250 miles per hour, in how many hours will the distance between the two planes be 1625 miles? Does it help to
asked by anonymous 
math
Can someone please help me with these few problems here? Find the holes and points of discontinuity: 12x^4+10x3  x1 and 12x+24  x^2+2x In the first, examine x=1 and in the second, examine x=2. Look at the numerator also at that same
asked by Lily 
Math
There are two kinds of people live in the country of King Arthur: those who always say the truth and those who always lie. One day the king ordered that all the liars must be put in jail. A woman, whose husband was put in jail, went to see the king and
asked by Bob 
Science
Consider an atom whose designation is given as 94 Pu 242. How many Protons are found in this atom? http://www.chemicalelements.com/elements/pu.html Protons same in all isotopes. The number of nutrons varies to change to atomic weight there are 94 because
asked by Jim 
Math
How would one write y = 2/3x 4 in standard form? First read: http://www.algebralab.org/studyaids/studyaid.aspx?file=Algebra1_55.xml Then: multiply both sides by 3 3y=2x12 then move terms into standard form 2x+3y=12 you could multiply both sides by 1
asked by Sissy 
Euclidean Geometry
I am in the 10th Grade and my question is: The base of an isosceles triangle is 21cm. long. The altitude to the base is 9cm. long. What is the approx. measure of a base angle of the triangle? The tangent of that angle is 9/10.5 = 0.8571 Trigonometric
asked by Blake 
Geology
I know you can't do the work for me  but has anyone done question 1b & 1c for S103 TMA08  As I am struggling and could really do with some idea of where to look Give us a question. We have no idea what 1b & 1c for S103 TMA08 is????? 1b  I have to draw a
asked by Desmond 
learning
How is the learning system in British?? http://en.wikipedia.org/wiki/Education_in_the_United_Kingdom =)
asked by abdo 
calculus
This was a multiple choice question asking which of the following is an equation of the line tangent to the graph of f(x)=x^4+2x^2 at the point where f'(x)=1? and the answer is y=x0.122, but I don't understand why. I tried to take the derivative of f(x)
asked by Anonymous 
algebra
how do I do this Solve for x. 3x – 2y = 6 Add 2y to both sides and then divide both sides by 3, to give you just "x' on the left side. so is this how i work it out 3x2y=6 3x 2y= 6 2y 3x=62y x= 2 +2y No. Add 2y to both sides. 3x 2y+2y= 6 +2y 3x=6+2y
asked by help 
Science
Hi Can someone give me websites that have quizes of Biology for KeyStage 3 for my grade 9 revision And the following topics are : Cells Food, digestion , respiration Living and feeding Variation , classification and inhertiance Plants thanx =) I doubt very
asked by Fun 
Macreconomics
How does an increase in savings affect the individual components of a leakagesinjections model (savings, taxes, imports, investment, government expenditure and exports)? Assume investment, government expenditure and exports are exogenous. do some
asked by Christo 
latin
What myth? About the origin of what? Surely not the language. ?? what was the myth about it's origin? I didn't see much about a myth. Saw more the development of it: http://www.learnlatinlanguage.com/HISTORY.HTM I hope that helps. If not, maybe someone
asked by Writeacher 
math
Which three options are true about the quadratic equation?? y= 4t^2 + 16t + 18 A. The graph has a minimum. B. The graph of y crosses the horizontal axis at t = 10 and t = 20. C. The equation 4t^2 + 16 + 18 = 6 has one real solution. D. The function has a
asked by jojo 
Buddha Question....
Does anyone know anything about the Buddhist monk Ummon? I read a koan (a type of Buddhist proverb or riddle) by Ummon that said some pretty harsh things about Buddha. I am wondering why a Chinese Buddhist monk of Ummon's statue would denigrate the founder
asked by Tyler 
essay
could I have to write an essay on the question what is the most important issue facing the global economy? explain the issue in detail and your reasoning for it being so important. I chose the topic of globalization. could someone help me figure out a few
asked by Greg 
The Death of Buddha
Did Buddha die from eating rotten pork or bad mushrooms? I've heard both; what's the historical conclusion on the matter? Thank you for using the Jiskha Homework Help Forum. Here you will find both the short and the long versions!
asked by Tyler 
albera
how do i work this out 80=10x divide each side by ten.
asked by help 
Macroeconomics
If there is a reduction in output, how will that affect money demand? do some research, then take a shot. Hint: what are the factors that produce a demand for money?
asked by Tim 
Operations Management
Hi, can anyone think of a business (service, products), that does NOT use operations management? Thanks, John
asked by John Hughes 
math
b divided 6= 36 b=? I assume you mean "divided by". b/6 = 36. Multiply both sides by 6. 6*(b/6) = 36*6 b =??
asked by kacey 
world history
why has most of the world impacted continuity change, economics, technology, social and political systems? I am not sure what you are asking. Please repost with more specifics. I hope this helps a little. Thanks for asking.
asked by pamela 
World History
Do you think the first world war created the 20th century? why or why not I think it helped. Maybe you think differently. What are your thoughts on it?
asked by Bryn