Question

What mass of oxygen can be obtained from heating 258.77 g of potassium chlorate?

Answer 1

Answer:

101.35 g

Explanation:

The balanced equation for the reaction is:

2KClO3 ----> 2KCl  + 3O2

So 2 moles of KClO3 produces 3 moles of Oxygen

Using the molar masses:

245.09 g KClO3 produces 95.994 g of  oxygen.

258.77 g produces 95.994 * 258.77 / 245.09 = 101.35 g (answer).