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16 September, 19:18

What is the molarity of a solution that contains 17 g of nh3 in 0.50 l of solution?

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Answers (1)
  1. 16 September, 19:55
    0
    2.0 M

    Explanation:

    1) dа ta:

    a) M = ?

    b) mass of solue = 17 g

    c) solute: NH₃

    d) V = 0.5o liter

    2) Formulae:

    a) number of moles, n = mass in grams / molar mass

    b) M = n / V (in liters)

    3) Solution

    a) Molar mass of NH₃ = 17.03 g/mol

    b) n = mass in grams / molar mass = 17 g / 17.03 g/mol = 0.998 mol NH₃

    c) M = n / V (in liters) = 0.998 mol / 0.50 liter = 1.996 M

    d) Round to the appropiate number of significant figures, 2: 2.0 M.

    Answer: 2.0 M
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