Question

Why are symbols and formulae of substances important?

Answer 1

Importance of symbols and Formulae :
1. Types of elements present in the compound. E.g. ($H_{2}O$ is made of two elements hydrogen and oxygen).
2. Number of each kind of atoms in one molecule. E.g. (water has 2 atoms of hydrogen combined with 1 atom of oxygen.)
3. Mass of one molecule of the compound. E.g. [$H_{2}O$ has mass $(1\times 2)+16=18g$].