Question

hydrogen sulphide gas burns in air to give water and sulphur dioxide. chemical equations and balance

Answer 1

2H2S + 3O2 - 2H2O + 2SO2

Answer 2

Explanation:

The reaction of hydrogen sulphide gas burns in air to give sulphur dioxide and water can written in two ways:

Word equation that show all compounds with their names:

Hydrogen sulphide + Air ( oxygen) $\longrightarrow$ water  +  Sulphur dioxide

Another way is the write the chemical equation with chemical formulae that is always balance equation in which all atoms must be balanced at both sides.  

The balance chemical equation can be written as:

$2 \mathrm{H}_{2} \mathrm{S}+3 \mathrm{O}_{2} \rightarrow 2 \mathrm{H}_{2} \mathrm{O}+2 \mathrm{SO}_{2}$