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12 November, 12:11

What is the molarity of a 2.0 L sodium hydroxide solution containing 10.0 grams of solute?

a. 0.80B. 0.13C. 5.0D. 0.25

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  1. 12 November, 12:23
    0
    Molar mass NaOH = 39.997 g/mol

    number of moles:

    n = mass of solute / molar mass

    n = 10.0 / 39.997

    n = 0.2500 moles

    Therefore:

    Molarity = moles of solute / volume (L)

    M = 0.2500 / 2.0

    M = 0.13 mol/L

    Answer B
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