heyyasmyne
heyyasmyne heyyasmyne
  • 13-09-2015
  • Chemistry
contestada

Magnesium combines with oxygen to form magnesium oxide. If 24.46 g of magnesium reacts completely with 5.41 g of oxygen, what is the percent by mass of oxygen in magnesium oxide?

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lulu1991
lulu1991 lulu1991
  • 13-09-2015
The magnesium oxide is MgO. The mass percent of oxygen is 16/(24.3+16)=39.7%. For the given reaction, in my opinion, there will be magnesium left after reaction. 
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