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12 February, 22:11

The atomic mass of hydrogen is 1.01. What is the mass of hydrogen in one mole of aluminum hydroxide (Al (OH) 3) ?

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  1. 12 February, 22:27
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    The answer is 3.03 g

    Ar (H) = 1.01 g/mol

    Since there are three atoms in Al (OH) 3, the total atomic mass of hydrogen in Al (OH) 3 is:

    3 * Ar (H) = 3 * 1.01 g/mol = 3.03 g/mol

    The mass (m) is atomic mass (Ar) divided by the number of moles n):

    m = Ar/n

    Ar = 3.03 g/mol

    n = 1 mol

    m = 3.03 g/mol / 1 mol = 3.03 g
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