Answer:
1. 10.66 moles of Al
2. 2.5 moles of Al₂O₃
3. 143.87 g of SO₂
Explanation:
The balance chemical equation is as follow,
4 Al + 3 O₂ → 2 Al₂O₃
1.
According to balance chemical equation,
3 moles of O₂ required = 4 moles of Al
So,
8 moles of O₂ will require = X moles of Al
Solving for X,
X = 8 mol × 4 mol / 3 mol
X = 10.66 moles of Al
2.
According to balance chemical equation,
4 moles of Al produced = 2 moles of Al₂O₃
So,
5 moles of Al will produce = X moles of Al₂O₃
Solving for X,
X = 5 mol × 2 mol / 4 mol
X = 2.5 moles of Al₂O₃
3.
The balance chemical equation for the oxidation of carbon disulfide is as follow;
CS₂ + 3 O₂ → CO₂ + 2 SO₂
Step 1: Calculate Moles of CS₂ as;
Moles = Mass / M.Mass
Moles = 85.5 g / 76.14 g/mol
Moles = 1.12 moles of CS₂
Step 2: Find out moles of SO₂ as;
According to balance chemical equation,
1 mole of CS₂ produced = 2 moles of SO₂
So,
1.12 moles of CS₂ will produce = X moles of SO₂
Solving for X,
X = 1.12 mol × 2 mol / 1 mol
X = 2.24 moles of SO₂
Step 3: Calculate Mass of SO₂ as;
Mass = Moles × M.Mass
Mass = 2.24 mol × 64.06 g/mol
Mass = 143.87 g of SO₂
