Calculate the molecular weight, wt.% element in a crust and wt.% oxide in a crust for the given information below.
SiO2
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Molecular weight of SiO2:
Si = 28.09 g/mol
O = 16.00 g/mol
Molecular weight of SiO2 = (28.09 + (2*16.00)) = 60.09 g/mol
Weight percentage of Si in the Earth's crust:
Si = 28.09 g/mol
O = 16.00 g/mol
Total molecular weight of SiO2 in the Earth's crust = (28.09 + 16.00) = 44.09 g/mol
Weight percentage of Si in SiO2 = (28.09 / 44.09) * 100 = 63.71%
Weight percentage of oxide in the Earth's crust:
Total molecular weight of SiO2 = 60.09 g/mol
Total molecular weight of Earth's crust = 100 g
Weight percentage of SiO2 in the Earth's crust = (60.09 / 100) * 100 = 60.09%