If you have one molecule of TiO2, how many molecules of O2 does it contain?
A. Three, TiO2 contains three molecules.
B. Two, TiO2 is a mixture of Ti and 2 O.
C. One, TiO2 is a mixture of Ti and O2.
D. None, O2 is a different molecule than TiO2.
E. none of the above
Answer: D
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