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9 May, 22:58

Anne prepares a solution of copper nitrate with a concentration of 30 g/dm³. What mass of copper nitrate did she add to 100cm³ of water, in grams?

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  1. 9 May, 23:48
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    3 g

    Explanation:

    Concentration of copper nitrate needed = 30 g/dm³

    Volume of water = 100 cm³ = 0·1 dm³

    (∵ 1 dm³ = 1000 cm³)

    Let the mass of copper nitrate that should be added to 100 cm³ water be m g

    m : 0·1 = 30

    ∴ m = 3 g

    ∴ Mass of copper nitrate that should be added to 100 cm³ of water = 3 g
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