Answer:
The answer to your question is 0.087 moles of Oxygen
Explanation:
Data
mass of KClO₃ = 7.11 g
moles of O₂ = ?
Balanced chemical reaction
2KClO₃ ⇒ 2KCl + 3O₂
Process
1.- Calculate the molar mass of KClO₃
KClO₃ = (1 x 39.1) + (1 x 35.45) + (3 x 16)
= 39.1 + 35.45 + 48
= 122.55 g
2.- Convert the mass to KClO₃ to moles
122.55 g ------------------- 1 mol
7.11 g ------------------- x
x = (7.11 x 1)/122.55
x = 0.058 moles
3.- Calculate the moles of Oxygen
2 moles of KClO₃ ---------------- 3 moles of Oxygen
0.058 moles ---------------- x
x = (0.058 x 3) / 2
x = 0.087 moles of Oxygen
