Question

How many atoms in 66.9 grams of zinc

Answer 1

6.1621 x 10²³ atoms of zinc

Procedure

To convert from grams to moles, use the molecular weight of zinc which is 65.38 g/mol.

To convert from moles to atoms, use the Avogadro's number: 6.0221408 x 10^23 atoms/ mol.

`66.9\text{ g Zn}\frac{1\text{ mol}}{65.38\text{ g}}\frac{6.0221408\text{ }*10^(23)\text{ atoms}}{1\text{ mol}}=6.1621\text{ }*10^(23)`