If this reaction produced 19.6 g of kcl, how much o2 was produced (in grams) ?

Question

Chemistry

Maggie Campos

15 January, 17:44

If this reaction produced 19.6 g of kcl, how much o2 was produced (in grams) ?

+3

Answers (1)

Know the Answer?

Novak · Answer 1

Answer is: mass of oxygen is 12,576 grams.

Missing chemical reaction: 2KClO₃ → 2KCl + 3O₂.

m (KCl) = 19,6 g.

n (KCl) = m (KCl) : M (KCl).

n (KCl) = 19,6 g : 74,55 g/mol.

n (KCl) = 0,262 mol.

From chemical reaction: n (KCl) : n (O₂) = 2 : 3.

n (O₂) = 3 · 0,262 mol : 2.

n (O₂) = 0,393 mol.

m (O₂) = n (O₂) · M (O₂).

m (O₂) = 0,393 mol · 32 g/mol.

m (O₂) = 12,576 g.