express in g\cm^3 a)2700kg/m^3

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  1. 100 cm = 1 m ... (100 cm)^3 = (1 m)^3

    1000 g = 1 kg

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  2. 2700kg/m^3 = 2.7*10^6 g/m^3.
    2.7*10^6 g/m^3 * 1m^3/10^6cm^3 = 2.7 g/cm^3.

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