Question

If the mass of 0.25 mole of an element X is 2.25g , the mass of one atom of X i about?

Answer 1

mass of (0.25)(6.023 into 10^23)atom = 2.25 g
mass of one atom
=2.25 / (0.25)(6.023into10^23)
=1.494into 10^-23
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