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Question

how many moles of hydrogen are in 65.78 grams of water?

Answer 1

65.8 g H2O = ? mol H2O

Molar mass:

18.02 g H2O = 1 mol H2O

(^{65.8 g H2O} / ₁) × (^{1 mol H2O}/_{18.02 g H2O})=3.65 mol H₂O