Procedure:
1. Measure mass of crucible, then mass of magnesium in the crucible
2. Heat over Bunsen burner until white
3. When cooled, measure mass of crucible with MgO inside
4. Calculate percent composition of MgO
Data:
Crucible mass: 19.64 g
Mg mass: .499 g
MgO mass: .0648
Mg moles: .00207917
O moles: 9.3 x 10^-4
Percent Oxygen: 23%
Percent Magnesium: 77%
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