Questions Asked on
April 28, 2007

  1. Chem 2

    what is the solubility of silver carbonate in water in 25 degrees celcius if Ksp=8.4X10-12? 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
  2. 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
  3. 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
  4. 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
  5. 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
  6. 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
  7. 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
  8. 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=12-x 5x+10(12-x) 5x+120-10x=100 5x-10x=2-5x=20 x4 y8 Looks good to me. Matt

    asked by Anonymous
  9. 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
  10. 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
  11. 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
  12. 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
  13. math

    andys average driving speed for a 4-hour 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
  14. 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
  15. 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
  16. 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
  17. 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
  18. math

    Can someone please help me with these few problems here? Find the holes and points of discontinuity: 12x^4+10x-3 ----------- x-1 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
  19. 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
  20. 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
  21. Math

    How would one write y = 2/3x -4 in standard form? First read: http://www.algebralab.org/studyaids/studyaid.aspx?file=Algebra1_5-5.xml Then: multiply both sides by 3 3y=2x-12 then move terms into standard form -2x+3y=-12 you could multiply both sides by -1

    asked by Sissy
  22. 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
  23. 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
  24. learning

    How is the learning system in British?? http://en.wikipedia.org/wiki/Education_in_the_United_Kingdom =)

    asked by abdo
  25. 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=x-0.122, but I don't understand why. I tried to take the derivative of f(x)

    asked by Anonymous
  26. 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 3x-2y=6 3x- 2y= 6 -2y 3x=6-2y x= 2 +2y No. Add 2y to both sides. 3x- 2y+2y= 6 +2y 3x=6+2y

    asked by help
  27. 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
  28. Macreconomics

    How does an increase in savings affect the individual components of a leakages-injections model (savings, taxes, imports, investment, government expenditure and exports)? Assume investment, government expenditure and exports are exogenous. do some

    asked by Christo
  29. 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
  30. 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
  31. 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
  32. 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
  33. 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
  34. albera

    how do i work this out 80=10x divide each side by ten.

    asked by help
  35. 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
  36. Operations Management

    Hi, can anyone think of a business (service, products), that does NOT use operations management? Thanks, John

    asked by John Hughes
  37. 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
  38. 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
  39. 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