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The mass of a single uranium atom is 4.70E-22 grams. How many uranium atoms would there be in 164 milligrams of uranium?

  • Chem -

    4.70E-22g/atom x # atoms = ?
    How do you find # atoms? You know you have mol U = 0.164g/atomic mass = ?
    Then you know there are 6.02E23 atoms in 1 mol. So
    # mols x 6.02E23 atoms/mol = # atoms.

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