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March 27, 2017

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A sample of iron ore contains 1.02 x 10^24
Fe atoms and is found to be 69.94% Fe by mass. What is
the mass of the sample?

  • Chemistry - ,

    mols Fe = 1.02E24/6.02E23.
    g Fe = mols Fe x atomic mass Fe.

    %Fe = (g Fe/mass sample)*100
    You have g Fe and %Fe, solve for mass sample.

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