How many oxygen atoms are in 2.90g of quartz?

What number of oxygen atoms are in 2.90g of quartz? (SiO2)

Discover the variety of moles initially, so take the mass occasions molar weight. 2.90g(28.086g/mol+(2(16))=174.25moles. Take this occasions Avogadro’s quantity, 6.022*10^23. Take this occasions 2 as a result of there are 2 oxygen molecules for each Si.

5.82*1022