Find the mass fraction of aluminum in the composition of al2o3 alumina.
| December 10, 2020 | education
let’s say we have 1 mole of substance
then the mass of aluminum in it is 2 * 27 = 54 g
total mass: 27 * 2 + 16 * 3 = 132
mass fraction of aluminum = 54/132 = 0.41
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