Question

What is rate law expression?

Answer 1

The rate law is an expression indicating how the rate depends on the concentration of the reactant and catalyst .The power of concentration in the rate law expression is called order with respect to the reactant or catalyst.A mathematical description of a reactants rate as a function of the concentration of the reactant and the rate constant (k)
rate=k[reactantA][reactant B]
For a unimolecular process