# How many moles of oxygen will be produced from the decomposition of 3 moles of KClO_3 in the reaction KClO_3 -> KCl + O_2?

Mar 8, 2016

We first have to balance the equation, because it isn't.

#### Explanation:

$K C l {O}_{3} > K C l + 1 \frac{1}{2} {O}_{2}$ because there are three $O$'s

Or rather:
$2 K C l {O}_{3} \to 2 K C l + 3 {O}_{2}$

This doesn't matter for the solution because every mole of $K C l {O}_{3}$ will produce $1 \frac{1}{2}$ mole of ${O}_{2}$

You can do the last bit.