Question

How many atoms are 1.00 x 10-9 g of lead?

Answer 1

1 mol of Pb = 207.2g  

1E-9 / 207.2 = 4.83E-12  

4.83E-12 x 6.02E23 = 2.91E12  

So 2.91 x 10^12 atoms.

Answer 2

1 mol of Pb = 207.2g

1E-9 / 207.2 = 4.83E-12

4.83E-12 x 6.02E23 = 2.91E12

So 2.91 x 10^12 atoms

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