Chapter 20, Problem 20.6E

For a reaction between ${\text{SO}}_{\text{2}}$ and ${\text{Cl}}_{\text{2}}$, the rate law is

$\text{rate}=k\left[{\text{Cl}}_{\text{2}}\right]$

What is the order with respect to ${\text{SO}}_{\text{2}}$? With respect to ${\text{Cl}}_{\text{2}}$? What is the overall order?