64. Solving a chemistry problem

1. The rate constant of the reaction A 2B → 3C is 0.6 l2•mol–2•s–1. The initial concentrations of substances A and B are 2.0 and 2.5 mol/l, respectively. Calculate the reaction rate at the initial moment of time and at the moment when the concentration of substance B becomes equal to 0.5 mol/l.