You can work out the formula of a compound from the ratio of different atoms in it. Sodium carbonate has the formula ${\mathrm{Na}}_2{\mathrm{CO}}_3$ because it contains two atoms of Sodium for every one atom of Carbon and three atoms of Oxygen. Deduce the formula for the compound:

Compound	Ratio in which the atoms are combined in it
Potassium Nitrate	$1$ of Potassium, $1$ of Nitrogen, $3$ of Oxygen

 

You can work out the formula of a compound from the ratio of different atoms in it. Sodium carbonate has the formula ${\mathrm{Na}}_2{\mathrm{CO}}_3$ because it contains two atoms of Sodium for every one atom of Carbon and three atoms of Oxygen. Deduce the formula for the compound:

You can work out the formula of a compound from the ratio of different atoms in it. Sodium carbonate has the formula ${\mathrm{NaCO}}_3$ because it contains two atoms of Sodium for every one atom of Carbon and three atoms of Oxygen. Deduce the formula for the compound:

You can work out the formula of a compound from the ratio of different atoms in it. Sodium carbonate has the formula ${\mathrm{Na}}_2{\mathrm{CO}}_3$ because it contains two atoms of Sodium for every one atom of Carbon and three atoms of Oxygen. Deduce the formula for the compound:

You can work out the formula of a compound from the ratio of different atoms in it. Sodium carbonate has the formula ${\mathrm{Na}}_2{\mathrm{CO}}_3$ because it contains two atoms of Sodium for every one atom of Carbon and three atoms of Oxygen. Deduce the formula for the compound:

You can work out the formula of a compound from the ratio of different atoms in it. Sodium carbonate has the formula ${\mathrm{Na}}_2{\mathrm{CO}}_3$ because it contains two atoms of Sodium for every one atom of Carbon and three atoms of Oxygen. Deduce the formula for the compound: