Posted by Adam on .
Initially, there are 33 moles of A and 0 moles of B. How many moles of A and B will be present after the system reaches equilibrium?
a) 33 moles A; 0 moles B
b) 0 moles A; 33 moles B
c) 3 moles A; 30 moles B
d) equal amounts of A and B
The answer is given as "C" but I don't know how it was obtained :/

chemistry 
DrBob222,
No K? no reaction?

chemistry 
chris,
Oops, here it is.
refer to the following equilibrium below:
A <===> B Keq = 10 
chemistry 
chris,
oops, wrong thread. but i have the same question regardless.

chemistry 
DrBob222,
These problems can be tough enough when we have enough information but omitting it makes it really tough. :).
..............A ===> B
initial......33......0
change........x.....+x
equil........33x......x
K = 10 = (B)/(A)
10 = (x)/(33x)
Solve for x and 33x.
I get x = 30 = B and 33x = 3 = A.