Chemistry

Problem

The termolecular reaction

\mathrm{2\,NO(g) + Cl_{2}(g) \rightarrow 2\,NOCl(g)}

proceeds according to the mechanism whose first elementary step is rate-determining:

\mathrm{2\,NO + Cl_{2} \rightarrow 2\,NOCl} \;\; (\text{slow})

If the concentration of NO is tripled while the concentration of

\mathrm{Cl_{2}}

remains unchanged, by what factor is the initial rate expected to change? a)

3

27

9

6