Questions Asked on
February 17, 2007

  1. Chemistry

    What is the net ionic equation when H2SO4 is neutralized by NaOH in aqueous solution? Write the molecular equation. H2SO4 + 2NaOH ==> Na2SO4 + 2H2O Convert to ions. 2H^+ + SO4^= + 2Na^+ + 2 OH^- ==> 2Na^+ + SO4^= + 2H2O Now cancel those ions that appear on

    asked by Bob
  2. Chemistry

    How many ml of a 0.827 Molar KOH solution is required for neutralization in a titration of 35.00 ml of 0.737 Molar H2SO4? Write the equation. 2KOH + H2SO4 ==> 2H2O + K2SO4 mols H2SO4 = M x L = 0.03500 L x 0.737 M = ?? mols KOH = 2 x mols H2SO4 from the

    asked by Bob
  3. science

    Which provides more cooling for a Styrofoam cooler, one with 10lb of ice at 0C or one with 10lb of ice water at 0C? Explain your reasoning. 10# ice requires heat to melt the ice + heat to heat the water after it melts. 10# ice water requires heat to heat

    asked by patrick
  4. integration by parts

    s- integral s ln (2x+1)dx ? = ln(2x+1)x - s x d( ln (2x+1)) = ln(2x+1)x- s x [(2x+1)'/ (2x+1)] dx = ln(2x+1)x- s x [(2)/ (2x+1)] ?... then i'm confused... "ln(2x+1)x- s x [(2)/ (2x+1)] ?... then i'm confused..." x [(2)/ (2x+1)] = 2x/(2x+1) =

    asked by nicholas
  5. Physics waves

    Two sinusoidal waves travel in the same direction and have the same frequency. Thier amplitudes are Y1 and Y2. The smallest possible amplitude of the resultant wave is: a) Y1+Y2 and occurs if they are 180 degrees out of phase b) [Y1-Y2] and occurs if they

    asked by susan
  6. Chemistry

    How do you find Absolute error and how do you find relative error? Absolute error is the difference between the experimental value and the actual value. Relative error, usually expressed as a percent, is the error relative to the correct value. For

    asked by mZ. YoU
  7. physics (please help)

    Win 1010” AM radio broadcasts at 1010KHz. Determine the wavelength of its signal, knowing that all radio waves travel at 3.00 X 10^8 m/s. f=1010kHz v=3.00 X10^8 m/s v=F X lambda lambda= 2.9 X 10^5 For a particular type of wave in a particular medium why

    asked by susan
  8. Financial Analysis

    The president, vice president, and sales manager of Moorer Corporation were discussing the company's present credit policy.

    asked by Vanessa Belunek
  9. physics

    would adding a proton or taking a proton away from gold nucleus mean it is more finacially valuable i think it would make it less valuable am i right or not, because you are reducing its state Helen Maybe but I think you are using the wrong criterion. Gold

    asked by helen
  10. Physica

    A 21.0-kg satellite has a circular orbit with a period of 2.37 h and a radius of 8.50×106 m around a planet of unknown mass. If the magnitude of the gravitational acceleration on the surface of the planet is 7.10 m/s2, what is the radius of the planet? I

    asked by winterWX
  11. Financial Analysis

    Reposting generically: How does a huge investment in cash affect a company's return on equity and its sustainable growth rate? As shareholder, would you endorse a large investment in cash? As a senior executive, how would you defend the investment?

    asked by Tia
  12. chemisrty

    if i am trying to find the diameter of an oil molecule and express my answer in scientific notation. the info is drop of oil 0.05 cm3 from a dropper spreads out to 40 cm2 is it vol = l x w x h 0.05cm3 = 20 x 20 xh 0.05 cm3 = 40cm2 after this im stuck as i

    asked by bex
  13. physics (check my answers)

    When the nuclear fuel in the sun is gone, the sun will collapse to a a. black hole b. white dwarf c. supernova d. neutron star My answer: I think its a black hole. If the mass of the Earth were suddenly doubled while the radius was unchanged, your weight

    asked by Jacob
  14. chemisrty

    which element results if 2 protons and 2 neutrons are ejected from a radium nucleus with atomic num 88 and mass num 226 how do i go about this please can you help If you can add you can do these. 88Ra226 ==>2X4 + zzYww. Now make the numbers add. Protons

    asked by bex
  15. integration by part

    s- integral s (p^5) lnp dp ? = (lnp)[(p^6)/(6)] - s (i'm confused here) Let ln p = u and p^5 dv = dv du = 1/p and v = p^6/6 The integral can be written uv - v du = (ln p*p^6)/6 - S (p^5/6) = (1/6)ln p*p^6 - ??? Complete the last step

    asked by nicholas
  16. Presidential Trivia

    Help - I can't find this answer. Which US President had the most siblings? Searched around google, to no avail. Anyone else have more luck than I? Thanks! By Googling president most siblings, I found the first site. To check with other sources, I looked

    asked by Steve
  17. UnKnown

    i need to make a steamboat and a cotton gin.. i can't find how to http://www.ehow.com/ http://www.google.com/search?q=build+a+steamboat&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7SUNA

    asked by Anonymous
  18. DR BOB - Chemistry Question 4 a - d

    a. State the atomic number of ununhexium and give the full symbol for the isotope ununhexium. b. Give the period and the group of the periodic table in which you would expect to find ununhexium, explaining how you arrived at your conclusions. Further name

    asked by Mark jones
  19. Financial Analysis

    In general terms, how does Oracle’s huge investment in cash affect its return in return on equity and its sustainable growth rate? As an Oracle shareholder, would you endorse Oracle’s investment in cash? As an Oracle senior executive, how would you

    asked by Tia
  20. eth 125

    Write a 1,050 to 1,400 word researcch paper identifying the linguistic, political, social, economic, religious, and familial cinventions and/or statuses of four Hispanic groups living in the United States. Your paper should cover Mexican Americans, Puerto

    asked by Trenet
  21. history

    She could not wite her name, but, she patented a hand operating machine for kneeding and rolling dough. Who was she? http://inventors.about.com/library/inventors/bljosephlee.htm http://www.ncat.edu/~childres/doughneader.html What year did the first

    asked by Mack
  22. supply and demand

    I'm looking for help on the third part of this question. I've included preceding questions/answers to show where I'm at. I don't know what to do next. Suppose that a market is described by the following supply and demand equations:

    asked by shannon
  23. Math

    I need help with this problem. The electricity meter on Donna's house read 71,236.4 kwh at the beginning of March and 73,196.2 kwh at the end of March. She pays 7.4% per kwh. What is the amount of her electricity bill for March? Round to the nearest cent.

    asked by Merisa Ann--Desperate for help!!
  24. English

    how does the importance of traveling for the development of Descartes's method compare to Swift's use of travels as a literary device in his novel?

    asked by Stacy
  25. integration by parts

    s- integral s ln (2x+1)dx ? = ln(2x+1)x - s x d( ln (2x+1)) = ln(2x+1)x- s x [(2x+1)'/ (2x+1)] dx = ln(2x+1)x- s x [(2)/ (2x+1)] dx = ln(2x+1)x- s (2x/2x+1) dx = ln(2x+1)x- s [(2x+1-1)/(2x+1)] ... i'm confused about why there is a minus 1 after the

    asked by nicholas
  26. Physics

    Explain what happens to the charge carriers in a semiconductor light dependant resistor when it is illuminated. Suggest why shining light onto an LED might be expected to generate a small voltage between its terminals. Thx A semiconducting light-dependent

    asked by Ishani
  27. solving exponential equations graphically

    e^(3-2x) = 4 How do I solve this graphically? Thanks. Make a graph of e^(3 - 2x) vs x for various values of x from 0 to 2. The answer will be in that interval. Where the graph crosses f(x) = y = 4, read off the value of x. That will be the answer. When x =

    asked by Jen
  28. bock 7 s103

    is there anybody out there who have looked at tma 06 yet if you have could we pick each others brains lol thanks I looked up tma 06 on google and found many site regarding religion which certainly is not my field. Please clarify your question, if you still

    asked by bex
  29. Math

    A block is a consecutive sequence of the same digit that is not part of a longer such sequence. a.) Determine the number of sequences of 0's and 1's of length 10 in which every block of 1's has an even length. b.) Determine the number of sequences of 0's

    asked by Kris
  30. history

    How many Blacks settled in America ans where did they settle? It looks as if what you need to do is learn how to conduct thorough and effective searches for yourself. That's what research is, and I'm sure that's what your teacher expects you to do --

    asked by Mack
  31. history

    Who was the first Black woman to graduate from college? Search at http://www.google.com Enter first black woman graduate college (leaving the ultra-common words out). =)

    asked by Mack
  32. theology

    what is the ordained clergy? http://en.wikipedia.org/wiki/Minister_of_religion Scroll down and read about Priests/Vicars. =)

    asked by colleen
  33. Social Studies-Geography

    I need some help finding the kinds of rocks and trees in Australia. The catch is, they have to be useful in making a house and tools. No modern technology is going to be used, so it's like starting from scratch. Any websites that can help? Thanks much.

    asked by Monique