What is the formula for calculating percentage of hydrogen from H₂O?

Question

Accepted Answer

(2 × mass of H₂O × 100) / (18 × mass of compound)

Answer

(1 × mass of H₂O × 100)/(18 × mass of compound)

Answer

(18 × mass of H₂O × 100)/(2 × mass of compound)

Answer

(16 × mass of H₂O × 100)/(18 × mass of compound)

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