Question

A reaction is first order with respect to reactant X and second order with respect to reactant Y. Which statement describes the rate law for this reaction?

Answer 1

a-rate = k[X][Y]
b-rate = k[X]2[Y]
c-rate = k[X][Y]2
d-rate = k[X]2[Y]2
e-rate = k[Y]

Answer 2

k[X][Y]2

Answer 3

You simply put the order as superscript over the active mass of reactant. For example, consider the following reaction

A+B--> C

If I say that order with respect to A is x and order with respect to B is y then the rate law will be \(\sf Rate = k[A]^x[B]^y\)