The question asks about the number of atoms in one molecule of hexane. The molecular formula for hexane is C6H14, which indicates that there are 6 carbon atoms and 14 hydrogen atoms in a single molecule of hexane. Therefore, if we sum these up, there are a total of 20 atoms in one molecule of hexane, so the correct answer is (d) twenty.
One molecule of hexane contains a total of 20 atoms, which includes 6 carbon atoms and 14 hydrogen atoms. Therefore, the correct answer is D. twenty.
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