Questions Asked on
December 29, 2007

  1. Chemistry

    Calculate the enthalpy change for the reaction 2C (s) + H2 (g) yield C2H2 (g) given the following reactions and their respective enthalpy changes: C2H2(g) + 5/2 O2(g) yield 2CO2(g) + H2O (l) = -1299.6kJ C(s) + O2(g) yield CO2 (g) -393.5 H2(g) + 1/2 O2(g)

    asked by Lucy
  2. ap chem

    Assuming the volumes of all gases in the reaction are measured at the same temperature and pressure, calculate the volume of water vapor obtainable by the explosive reaction of a mixture of 725mL of hydrogen gas and 325mL of oxygen gas. andd... Calculate

    asked by Alicia
  3. confirmation of multiple choice questions biology

    1. The net gain of ATP after glycolysis is .. A) two B) four C) 34 D) 36 I think it's A. 2. During photosynthesis water .. A) is made B) breaks down C) is not necessary I put B. 3. The most immediate effect of chloroplasts with non-functioning thylakoids

    asked by Angela
  4. Science

    Give one example of a series of energy transformations. For example solar energy from a plant changes to kinetic energy in an animal's body and so on.

    asked by Zarin
  5. us history

    1. All of the following factors contributed to the weakness of organized labor in the early 1800s except a. widespread economic prosperity. b. workers' strong spirit of independence. c. the availability of inexpensive western land. d. the use of

    asked by monica
  6. Mathematics

    Solve the following differential equation, i.e. solve for y: dy/dx - y/x = 1/x + y + 1 I have this so far, 1. dy/dx= (y + 1 + xy + x)/x 2. x dy = (y + 1 + xy + x)dx 3. Integrate both sides... xy + c = xy + x + .5x^2y + .5x^2 + k where c and k are constants

    asked by xX_Supaman_Xx
  7. history

    When was the Hellenic period in Greece?

    asked by fiona
  8. US history

    1. Andrew Jackson exerted the power of the presidency by a. allowing South Carolina to secede from the Union. b. depositing federal funds in the National Bank. c. refusing to be bound by Supreme Court decisions. d. vetoing the Force Act of 1833. 2. The

    asked by julie
  9. biology - confirmation of true / false answers

    1) A product of yeast fermentation is LACTIC ACID. False 2) To begin glycolysis, FOUR ATP molecules are needed. False 3) Anaerobic respiration takes place in the CYTOSOL. True 4) Glucose enters the cell by FACILITATED DIFFUSION. True 5) If an animal cell

    asked by Angela
  10. pigskin geography

    why is the symbol of a pheonix appropriate for the city of Atlanta's seal?

    asked by Anonymous
  11. drwls & Damon - maths

    hey guys, i follow you up to the point of intergrating the final line. How would I intergrate [x^-2.e^-x] dx thx

    asked by xX_Supaman_Xx
  12. US history

    1. Which of the following justifications was not one of the proslavery arguments? a. Slavery offered a secure and certain life for slaves. b. Slavery involved only a very small number of slaves. c. Slavery assured an adequate labor supply for planters. d.

    asked by ethan
  13. math

    graph y = 2x - 3 and the domain is the real number when i plot the point without goin them or with goin them ? explain when i draw the line in grade papper or ony plot the point

    asked by mota
  14. Career Planning

    What job opportunities are offered for a bachelors degree of joint honours in both physics and math besides teaching?

    asked by Anonymous
  15. integral calculus

    intergrate the following: a) (y+1)^-1 dy b) (1+1/x) dx I think the answers are: a)ln(y+1) + C b)x + ln (x) + C but I am not to sure about them. Can you please tell me if they are right/wrong and if wrong, show me how to get it/them right....

    asked by josh
  16. english

    The man_____you should marry is the one ______ gave me the portfolio. A. who:who B. Whome:whom C. whom:who D. who:whom

    asked by bonnie
  17. math


    asked by 565
  18. english

    _____ is a speakers willingness to accept that some counter arguements might be valid

    asked by natasha
  19. american history

    True/ False questions! 8. Three new congressional leaders after the War of 1812 were Daniel Webster, who represented the South; Henry Clay, who represented the Northeast; and John C. Calhoun, who represented the West. During his presidency, Andrew Jackson

    asked by Evan