2KClO3 → 2KCl + 3O2

How many moles of oxygen are produced if 4 moles of potassium chlorate decomposes?
4?

1 answer

2KClO₃ ---> 2KCl + 3O₂
2 mol 2 mol 3 mol

When 2 mol of KClO₃ decompose, 3 mol of oxygen are produced.