3 g of H 2 react with 29 g of O 2 to form H 2 O . Find the amount of the reactant left unreacted?

Question

3 g of H 2 react with 29 g of O 2 to form H 2 O . Find the amount of the reactant left unreacted?, 6 g, 8 g, 5.7 g, 5.2 g

MARKS App · Accepted Answer

2 H 2 2 × 2.016 = 4.032 + O 2 32 g → 2 H 2 O 2 × 2.016 + 16 = 36.032 3 g of H 2 require O 2 = 32 4.032 × 3 = 23.8 g O 2 left unreacted = 29 - 23.8 = 5.2 g

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