contestada

KClO₃ → Kelt Oz
1. Potassium chlorate is decomposed to form potassium chloride and oxygen gas. How many
moles of potassium chlorate are needed to produce 7.8 moles of oxygen?

Respuesta :

Neetoo

Answer:

5.2 moles of  KClO₃  are needed

Explanation:

Given data:

Number of moles of potassium chlorate needed = ?

Number of moles of O₂ formed = 7.8 mol

Solution:

Chemical equation:

2KClO₃      →     2KCl + 3O₂

now we will compare the moles of KClO₃ and  O₂.

                   O₂        :         KClO₃    

                    3          :           2

                   7.8        :          2/3×7.8 = 5.2

5.2 moles of  KClO₃  are needed.