si molar mass, SOLVED: many silicon atoms are present in a sample of 32.8 g of silicon? The molar mass of silicon is 28.09 g/mol: O 7.03 * 1023 atoms 1,98 x 1025 atoms 5.15 * 1023 atoms 1.84 * 1022 atoms, Molar Mass Formula, Unit, Examples, FAQs