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6 May, 00:29

Calculate the mass percent (m/m) of a solution prepared by dissolving 59.56 g of nacl in 165.1 g of h2o. express your answer to four significant figures.

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  1. 6 May, 03:03
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    The general formula for mass percent of a solution is:

    % m/m = [grams of solute] / [grams of solution] * 100

    And grams of solution = grams of solute + grams of solvent.

    So, in our problem:

    Solute = NaCl = > mass of solute = 59.56 g

    Solvent = H2O = > mass of solvent = 165.1 g

    => mass of solution = 59.56 g + 165.1 g = 224.66 g

    => % m/m = [59.56 / 224.66] * 100 = 26.51 g (using four significant figures).

    Answer: 26.51%
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