The constituents of a solution, A and B participate in a bimolecular, elementary reaction with a rate constant of k-3x1010 (mol/L)-1s-1

Question

The constituents of a solution, A and B participate in a bimolecular, elementary reaction with a rate constant of k-3x1010 (mol/L)-1s-1. In a solution that initially contains 10-3 M A and 104 M B, what is the rate of destruction of species B?

Answer 1

rate =k[A][B]

rate=3E10(1E3)(104)= 3.12E15M/sec