Question

Fill in the blank with the correct number to balance the equation: ___KClO3 → 2KCl + 3O2. (Enter only a whole number.)

Answer 1

The coefficient would be 2

Answer 2

Answer:

Answer is "2"

Explanation:

In the decomposition of potassium chlorate (KClO₃) we get KCl and oxygen gas.

Each mole of KClO₃ gives one mole of KCl and 1.5 moles of O₂ gas.

So the reaction will be:

$KClO_{3}-->KCl+\frac{3}{2} O_{2}$

In order to convert the fractional coefficient to whole number we will multiply the complete equation with two.

$2X[KClO_{3}-->KCl+\frac{3}{2} O_{2}]$

Thus the balanced equation will be:

$2KClO_{3}-->2KCl+3O_{2}$

hence coefficient of KClO₃ is "2".