Choose the best answer to the following.
If you have one molecule of TiO2, how many molecules of O2 does it contain?
(a) One; Ti O2 is a mixture of Ti and O2.
(b) None; O2 is a different molecule from Ti O2.
(c) Two; Ti O2 is a mixture of Ti and 2 O.
(d) Three; Ti O2 contains three molecules.
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