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23 January, 15:37

Ocean water contains 3.5 % NaCl by mass. What mass of ocean water in grams contains 46.8 g of NaCl?

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  1. 23 January, 17:03
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    1.3 kg

    Explanation:

    Mass of ocean water = mass of NaCl * (mass of ocean water/mass NaCl).

    The % NaCl tells us there are 3.5 g NaCl/100 g ocean water or 100 g ocean water/3.5 g NaCl.

    Mass of ocean water = 46.8 * (100/3.5)

    Mass of ocean water = 46.8 * 28.6

    Mass of ocean water = 1300 g = 1.3 kg

    Note: The answer can have only two significant figures because that is all you gave for the percentage of NaCl.
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