Question

The rate of chemical change is directly proportional to product of active masses at that temperature.
If true enter 1, if false enter 0.

Answer 1

The rate of chemical change is directly proportional to product of active masses at that temperature. In fact, the rate of a reaction is defined as the change in concentration (number of moles per litre) of reactants or products per unit time. According to the law of mass action, rate of reaction is proportional to active mass of the reactants.
Consider the general reaction $nA+mB\to product$
$Rate=k[A{]}^n\times [B{]}^m$