0.05mo(l)/(d)m^(3)

in A and

0.07mo(l)/(d)m^(3)

in B. After

2.0h

the concentration of A had fallen to 0.010

mo(l)/(d)m^(3)

. Calculate the rate constant

k

with unit

dm^(3)mol^(-1)s^(-1)

. Please enter your answer with 2 significant figures. Hint: this is a second-order type II reaction, find the integrated rate law in lecture note.