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19 July, 20:08

How many moles of br2 (l) (mm = 159.80 g/mol) are in 13.9 ml of liquid bromine? the density of br2 (l) is 3.12 g/ml?

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  1. 19 July, 21:00
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    Moles = 0.271 mol

    Solution:

    Step 1: Calculate Mass of Br₂ as;

    Density = Mass : Volume

    Solving for Mass,

    Mass = Density * Volume

    Putting values,

    Mass = 3.12 g. mL⁻¹ * 13.9 mL

    Mass = 43.36 g

    Step 2: Calculate Moles of Br₂ as;

    Moles = Mass : M. Mass

    Putting values,

    Moles = 43.36 g : 159.80 g. mol⁻¹

    Moles = 0.271 mol
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