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 is "2"

Step-by-step 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+(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+(3)/(2) O_(2)]`

Thus the balanced equation will be:

`2KClO_(3)-->2KCl+3O_(2)`

hence coefficient of KClO₃ is "2".