60. A reacts with B in a one-step reaction to give AB. The rate constant k for the reaction is 2.0 x 10-3 L / (mol s). If 0.50 mole of A and 0.30 mol of B are placed in a 0.50 litre vessel, what is the initial rate of the reaction?

a) 3.0 x 10-4 mol / L s

b) 1.2 x 10-3 mol / L s

c) 1.5 x 10-4 mol / L s

d) 7.5 x 10-5 mol / L s