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a 50 g bracelet is suspected of being gold plated lead instead of pure gold.when it is dropped into a full glass of water,4cm of water overflows.is the bracelet pure gold?if not,what proportions of its mass is gold?determine also the amount of its materials are used:

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cristine sayon
3 answers

  1. depends on the dimensions of the glass.

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    Steve

  2. using 4 cm^3

    the density is ... 50g / 4 cm^3
    ... 12.5 g/cm^3

    this is between lead (11.3 g/cm^3)
    ... and gold (19.3 g/cm^3)

    gold plated lead is a good guess

    G = fraction gold

    19.3 G + 11.3 (1 - G) = 12.5

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    Scott

  3. Not satisfied

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    Evalyn

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