#### Answer

0.037 M

#### Work Step by Step

We use the equation for $K_c$ to find:
$\frac{[SO_{3}]^{2}}{[SO_{2}]^{2}[O_{2}]} = K_{c}$
$[SO_{3}]=(2.8×10^{2}×0.0124^{2}×0.031)^{1/2}$ = 0.037 M

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Published by
McGraw-Hill Publishing Company

ISBN 10:
0078021529

ISBN 13:
978-0-07802-152-7

0.037 M

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