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4 April, 16:26

If 5 grams of hydrogen reacted with 40 games of oxygen to form water, how much of water would be formed?

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  1. 4 April, 19:44
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    2H₂ + O₂ = 2H₂O

    n (H₂) = m (H₂) / M (H₂)

    n (H₂) = 5g/2.0g/mol=2.5 mol

    n (O₂) = m (O₂) / M (O₂)

    n (O₂) = 40g/32.0g/mol=1.25 mol

    H₂ : O₂ = 2 : 1

    2.5 : 1.25 = 2 : 1

    n (H₂O) = n (H₂) = 2n (O₂) = 2.5 mol

    m (H₂O) = n (H₂O) M (H₂O)

    m (H₂O) = 2.5mol*18.0g/mol=45.0 g
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