I need help with chemistry

Question

  Calculate the mass of SO₂ produced when 185 grams of oxygen reacts using this equation:         2Cu₂S + 3O₂ ----> 2Cu₂O + 2SO₂

Answer 1

2Cu₂S + 3O₂ ----> 2Cu₂O + 2SO₂

mass SO₂ = 185 g O₂ x 1 mole O2/32 g x 2 mole SO₂/3 mole O₂ x 64 g SO₂/mole SO₂ = 247 g SO₂

This would be the expected mass of SO₂ assuming Cu₂S is not limiting.

Answer 2

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185 g O2 × (1 mol O2 / 31.999 g O2) × ...