Question

Write the molecular formulae of sodium carbonate

Answer 1

Molecular formula

A shorthand notation for the molecule of a substance in terms of symbols and the number of atoms of each element present in it is called its molecular formula.

Molecular formula of sodium carbonate

Step 1: Write the symbol of the element

Sodium - $\mathrm{Na}$ Carbonate - ${\mathrm{CO}}_3$

Step 2: Write the valency of the element

$$\begin{gathered} \mathrm{Na}{\mathrm{CO}}_3 \\ 12 \end{gathered}$$

Step 3: Interchange the valencies

$$\begin{gathered} \mathrm{Na}{\mathrm{CO}}_3 \\ \swarrow \searrow \\ 12 \end{gathered}$$

Step 4: Write the valency at the subscript

${\mathrm{Na}}_2{\mathrm{CO}}_3$