According to the what was presented to me, to find the number of moles of a compound or element from a given mass, we need to use the molar mass of this element and do the following calculation:
Si = 28.0855g/mol
28.08g = 1 mol of Si
4.68g = x moles of Si
x = 0.17 moles of Si
O = 16g/mol
16g = 1 mol of O
5.32g = x moles of O
x = 0.33 moles of O