question for chem?

A sheet of aluminum foil that has a thickness of 0.100 micrometers (μm), has dimenstions of 24.0 cm x 15.0 cm. How many milligrams would this sample weigh if the density of aluminum is 2.70 g/cm^3

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  • 1 month ago
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    Ans = volume of sheet = length*width*thickness

    length= 24 cm width= 15 cm and thickness= 0.100 um = 1*10^-5 cm

    volume = 24*15*1*10^-5 = 3.6*10^-3 Cm^3

    density of aluminum is 2.70 g/cm^3

    mass= density*volume = 2.70*3.6*10^-3= 9.72*10^-3 g = 9.72 mg

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