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25 March, 13:21

What mass of sodium chloride contains 4.59 x 10 24 formula units?

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  1. 25 March, 14:03
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    The term formula units means molecules.

    Then, what you are looking for is the mass in 4.59*10^24 molecules.

    The procedure involves to convert the 4.59 * 10^24 molecules into moles and use the molar mass of the sodium chloride.

    1) Number of moles = 4.59 * 10^24 molecules / (6.02 * 10^23 molecules/mol) = 7.62 mol

    2) Molar mass of NaCl = 22.99 g/mol + 35.45 g/mol = 58.44 g/mol

    3) mass of NaCl = molar mass * number of moles = 58.44 g/mol * 7.62 mol = 445.31 g of NaCl

    Answer: 445.31 g of NaCl.
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