Question

The rate of formation of $S{O}_3$ in reaction of $2S{O}_2+O_2\to 2S{O}_3$ is 100g per min. Hence rate of disappearance of $O_2$ is:

Answer 1

Since the coefficient of $O_2$ is half of that of $S{O}_3$, you would expect the rate of $O_2$ is also half the rate of $S{O}_3$.