In: Chemistry

# Determine the mass of oxygen in a 3.6 g sample of Al2(SO4)3. m(O) =

Determine the mass of oxygen in a 3.6 g sample of Al2(SO4)3.

m(O) =

## Solutions

##### Expert Solution

for the calculation of mass of oxygen in Al2(SO4)3, first calculate the no of moles of Al2(SO4)3 from 3.6g .

No of mole of Al2(SO4)3= given mass / molecular mass

=3.6 /342.15

=0.01 mol

Al2(SO4)3 has 12 Oxygen atoms,then the no of moles of oxygen = 12 0.01

=0.12 mol

mass of 0.12 mol Oxygen =0.12 16     ( 16 is atomic mass of oxygen)

=1.92 g

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