Question

What is reaction? What is displacement reaction? What is moler mass?

Answer 1

any physical or chemical change is called reaction.

the reaction in which an element displace another element from its compound is called a displacement reaction.

mass of substance divided by the amount of substance is called molar mass

Answer 2

Reaction is the change in chemical properties of two or more substances.

Displacement reaction is the reaction in which more reactive element displaces the less reactive element from its compound.

Moler mass the mass of the molecules of the substance.