Question

If you were asked to convert 4.2 × 1022 atoms of aluminum to moles, which of the following should you use for the conversion?

Answer 1

4.2×1022/NA is a:
$N_{A} is~ the~ Avogadro ~number$$6.022 x 10^23~ a/m$(a/m)= atoms and moles

Answer 2

You should use Avogadro’s number for the conversion, because Avogadro’s Law states that there are 6.02 x 10^23 atoms per 1 mol of that substance.