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A. It contains three times as many hydrogen atoms as carbon atoms.

Explanation:

Empirical formula is the formula which shows the atoms of the elements in the simplest ratio of atoms whereas molecular formula show the actual number of atoms.

Thus if a compound has an empirical formula of , it means there are thrice number of hydrogen atoms as carbon atoms.

The molecular formula could be written as . Thus if number of carbon atoms are n, the number of hydrogen atoms are 2n.

b) nuclear ive learned that in a pedtrodic table