How is a mole related to Avogadro's number?
Difficulty: Easy
Relation of Avogadro's number to mole:
One mole of hydrogen atoms = 6.02 x 1023 atoms of hydrogen (H) = 1 a.m.u
One more of hydrogen molecules = 6.02 x 1023 molecules of hydrogen (H2) = 2 a.m.u
One mole of water = 6.02 x 1023 molecules of water (H2O) = 18 a.m.u
$\text{Number of moles of a substance} = \frac{\text{Number of molecules of a substance}}{N_{A}}$
$\text{Number of moles of a substance} = \frac{\text{Number of molecules of a substance}}{6.02 \times 10^{23}}$