Answer:
1.4 × 10¹⁹ molecules of CS₂
Step-by-step explanation:
The chemical equation is as follow,
CS₂ + 3 O₂ → CO₂ + 2 SO₂
According to this equation,
1.8 × 10²⁴ molecules (3 mole) of O₂ reacts with = 6.022 × 10²³ molecules (1 mole) of CS₂
So,
4.21 × 10¹⁹ molecules of O₂ will react with = X molecules of CS₂
Solving for X,
X = (4.21 × 10¹⁹ × 6.022 × 10²³) ÷ 1.8 × 10²⁴
X = 1.4 × 10¹⁹ molecules of CS₂