Question 1
You heat 3.952 g of a mixture of Fe3O4 and FeO to form 4.162 g Fe2O3. The mass of oxygen reacted is
◦
0.210 g◦
0.496 g◦
1.249 g◦
1.000 g◦
none of these are correctQuestion 2
You take an aspirin tablet (a compound consisting solely of carbon, hydrogen, and oxygen) with a mass of 1.00 g, burn it in air, and collect 2.20 g of carbon dioxide and 0.400 g water. The molar mass of aspirin is between 170 and 190 g/mol. The molecular formula of aspirin is:
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C6H8O5.
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C9H8O4.
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C8H10O5.
◦
C10H6O4.
◦
None of these are correct.