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31 December, 01:42

How many moles do you need to prepare 1.675 L of a 8.50 M NaOH solution? Round your answer to 2 decimal places.

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Answers (2)
  1. 31 December, 01:53
    0
    14.24mol

    Explanation:

    Molarity, M = number of moles of solute, n divided by volume, v of solution in Litres (dm³)

    number of moles of NaOH=?

    Molarity of NaOH solution = 8.50 M

    Volume of NaOH solution = 1.675 L

    From, M = n/v, we Make n subject of formula

    n = Mv

    n=8.50*1.675

    n=14.24 mol

    Therefore, number of moles in 8.50 M NaOH solution is 14.24 mol
  2. 31 December, 02:22
    0
    0.20 mol's

    Explanation:

    1.675 L = 1.675 dm^3

    moles = V / (conc):

    moles = 1.675 / (8.5)

    moles = 0.1970 ... - -> 0.20
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