Question

potassium chlorate on heating produces Potassium Chloride and Oxygen gas. balance it

Answer 1

Hello friend..
Here is your answer..
KClO3 = KCl + 3O2

Answer 2

The balancing of a ‘chemical reaction’ involves the balancing of all atoms at both sides of the chemical equation. Hence to write a balance equation we need to write the equation first then balance all the atoms at both sides by the addition of coefficients.  

Hence the chemical equation for the production of ‘potassium chloride’ and ‘oxygen’ by the thermal decomposition of ‘potassium chlorate’ is:

$\mathrm{KClO}_{3} \rightarrow \mathrm{KCl}+\mathrm{O}_{2}$

And the balance equation must be:  

$2 \mathrm{KClO}_{3} \rightarrow 2 \mathrm{KCl}+3 \mathrm{O}_{2}$