How many moles of oxygen will be produced from the decomposition of 3 moles of KClO3?

Equation: __KClO3 - -> __KCl + O2

4.5moles

Explanation:

First, let us balance the equation given from the question. This is illustrated below:

KClO3 - > KCl + O2

There are 2 atoms of O on the right side and 3 atoms on the left. It can be balance by putting 2 in front of KClO3 and 3 in of O2 as shown below

2KClO3 - > KCl + 3O2

Now, we have 2 atoms each of K and Cl on the left side and 1atom each of K and Cl on the right. It can be balance by putting 2 in front of KCl as shown below:

2KClO3 - > 2KCl + 3O2

Now the equation is balanced.

From the balanced equation,

2 moles of KClO3 produced 3 moles of O2.

Therefore, 3 moles of KClO3 will produce = (3 x 3) / 2 = 4.5moles of O2.

Therefore 3 moles of KClO3 will produce 4.5 moles of O2