If the activation energy required for a chemical reaction were reduced, what would happen to the rate of the reaction?

The rate would increase.

Explanation:

Activation energy is the minimum energy for a chemical reaction to occur, ie it is one of the determining factors for the occurrence of a reaction, together with contact and favorable collision between the reactant molecules. The reaction rate corresponds to the rate at which the chemical reaction occurs. In chemistry and specifically chemical kinetics, the activation energy and activation rate are inversely proportional, which means that when the activation energy is reduced, the reaction rate increases.

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the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.