How many atoms are i 32.2 g Al?

Answer 1

Convert g of Al to moles using its MW. Then use avogadro's # to obtain the # of atoms.

MW of Al = 26.98 g/mol

32.2 g Al x (1 mol Al / 26.98 g Al) = 1.19 mol Al

# of atoms = 1.19 mol Al x (6.02 x 10²³ atoms Al / 1 mol Al) = 7.16 x 10²³ atoms Al