Hydrogen sulfide (H2S) reacts with oxygen (O2) to produce sulfur dioxide (SO2) and water. How many grams of SO2 will be produced if 100 g of H2S react with 100 g of O2?

Question

Limiting Reactant A

Answer 1

2H₂S + 3O₂ ==> 2SO₂ + 2H₂O .. balanced equation

100 g H₂S x 1 mol H₂S / 34 g = 2.94 mol H₂S (÷2->1.47)

100 g O₂ x 1 mol O₂ / 32 g = 3.13 mols O₂ (÷3->1.02)

Limiting reactant = O₂ b/c 1.02 is less than 1.47

Grams of SO₂ formed = 3.13 mol O₂ x 2 mols SO₂ / 3 mols O₂ x 64 g SO₂/mol SO₂ = 134 g SO₂