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chemistry

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Assume that the entire mass of an atom is concentrated in its nucleus, a sphere of a radius 1.5 x 10 to the -5 pm. If the mass of the atom is 2.39 x 10 to the -22 g, what is the density?

  • chemistry -

    Volume of a sphere:
    V = (4/3)πr3
    π=3.14, and r = 1.5x10-17m
    Find the volume of the nucleus in m^3
    1 m^3 = 1x10^6 cm^3
    Convert the volume to cm^3
    Substitute M in grams and V in cm^3 into:
    D = M/V
    The units of density are grams/cm^3

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