For the following gaseous reversible reaction:
\( 3 \, \text{A}_{(g)} + \text{B}_{(g)} \rightleftharpoons \, \text{A}_3 \text{B}_{(g)} \)
(\( \Delta H = -q \, \text{kJ} \)), the amount of product \( \text{A}_3 \text{B}_{(g)} \) is affected by
\(\underline{\hspace{3cm}}\).