Thursday
May 23, 2013

# Posts by Confused

Total # Posts: 283

chemistry
Kc=5.85x10^-3 at 25 degrees C for the reaction N2O4(g)<-->2NO2(g) fifteen(15.0) grams of N2O4 is confined in a 5.00-L flask at 25 degrees C. Calculate(a) the number of moles of NO2 present at equilibrium and(b) the percentage of the original N2O4 that is dissociated.

help plz
c. progress....the other 3 are complete antonyms

math
In Quadratics Grade Ten:How do you find the coordinates of the vertex? What is the Optimum value mean? What are the zeros of the relation? How do you know if the parbola is Maximum or Minimum?

Chemistry
ok the answer i got now was 50 degrees celcius

Chemistry
i keep getting 32.3005 for T, if you have worked it out did you use 8.314472 for R, also is -126kj/mol -12600j/mol?

Chemistry
The aquation of tris(1, 10-phenanthroline)iron(II) in acid solution takes place according to the equation: Fe(phen)3^2+ + 3H3O + 3H2O==> (Fe(H2O)6^2+ + 3 phenH^+ If the activation energy is 126 kJ/mol and frequency factor is 8.62 x 1017 s-1, at what temperature is the rate ...

Chemistry
i dont understand where k1 k2 t1 t2 come from... :(

Physics
doesnt vq = - work ?...signs are important since work = -u, and u = vq

Math for teaching.
I need help finding examples of discrete models used in addition. Can you explain this to me or show me a cite that might help. Thanks