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10 December, 00:21

What would be the resulting molarity of a solution made by dissolving 17.8 grams of LiF in enough water to make a 915-milliliter solution? Show all of the work needed to solve this problem.

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  1. 10 December, 02:21
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    First, determine the amount of substance in moles by dividing the given amount in grams by the molar mass.

    17.8 grams LiF x (1 mole / 25.94 grams LiF) = 0.686 moles LiF

    Divide this amount of substance by the volume of the solution in liters.

    molarity = 0.686 moles LiF / 0.915 L sol'n

    The molarity is therefore, 0.75 M.
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