Calculate the equilibrium constant (K_c) for the reaction.

Here are the solutions to questions 7, 8, 9, and 10.

7. Calculate the equilibrium constant ($K_c$) for the reaction.
The reaction is $2SO_2(g) + O_2(g) \rightleftharpoons 2SO_3(g)$.
The equilibrium concentrations are given as:
$[SO_2] = 3.0 \times 10^{-1} \text{ M}$
$[O_2] = 3.5 \times 10^{-2} \text{ M}$
$[SO_3] = 5.0 \times 10^{-2} \text{ M}$

Step 1: Write the equilibrium constant expression.

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