$${(1,738 \times 10^3\, \mathrm{kg/m^3})(2,00 \times 10^{–6}\, \mathrm{m^3})(6,02 \times 10^{23}\, \mathrm{mol^{–1}}) = 2,0926 \times 10^{21}\, \mathrm{kg/mol}}$$