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28 October, 22:57

What would be the resulting molarity of a solution made by dissolving 21.9 grams of KCl in enough water to make an 869-milliliter solution? Show all of the work needed to solve this problem.

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  1. 28 October, 23:18
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    Molar mass KCl = 74.5513 g/mol

    Number of moles:

    21.9 / 74.5513 = > 0.293 moles

    Volume = 869 mL / 1000 = > 0.869 L

    Molarity = moles / Volume

    Molarity = 0.293 / 0.869

    => 0.337 M
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