Help with chemical kinetics

[Nyakocchi]

Hi! My AP Chem teacher assigned me a set of problems, and this problem in particular is giving me problems. I'm not asking anyone here to completely solve the problem, I know the rule about that. If at all possible, can someone tell me how to start it off? Thanks!

 

Consider the reaction

 

3A + B + C ---> D + E

 

Where the rate law is defined as

An experiment is carried out where ₀ = [C]₀ = 1.00M and [A]₀ = 1.00 X 10^-4M.

 

If after 3.00 min, [A] = 3.26 X 10^-5M, calculate the value of k.

Edited March 10, 2013 by Nyakocchi

[BabcockHall]

In general rate constants can be found in two ways: by calculating the initial rate or by studying the integrated rate equation. For a crude estimate of k, I would try the former approach, but it is going to be very rough. Too much of A has been consumed for this approach to be perfectly valid.