[captainglyde]

Hello...  please help 

A and B react to produce C according to the following chemical equation:

A + B --> C

Amounts of A and B are added to an equilibrium reaction mixture of A, B, and C such that when equilibrium is again attained, the amounts of A and B are doubled in the same volume.  How is the amount of C changed?

(Ans: C is quadrupled).

Can someone please explain this to me?

Thanks so much.

[AWK]

K=[C]/([A])

K=[xC]/([2A][2B])

[captainglyde]

Thanks so much