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11 July, 20:31

How many moles of potassium bromide are in 68.5 mL of a 1.65 M solution?

Answer is 0.11

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Answers (1)
  1. 11 July, 23:32
    0
    Number of moles = 0.116 mol

    Explanation:

    Given dа ta:

    Number of moles of potassium bromide = ?

    Volume of solution = 68.5 mL

    Molarity of solution = 1.65 M

    Solution:

    First of all we will convert the mL into L.

    68.5 mL * 1 L / 1000 mL

    0.07 L

    Molarity = Number of moles / Volume in litter

    we will rearrange the formula:

    Number of moles = molarity * volume in litter

    Now we will put the values in formula:

    Number of moles = 1.65 M * 0.07 L

    Number of moles = 0.116 mol
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