Naphthalene, commonly found in mothballs, is 93.75% carbon and 6.25% hydrogen by mass. If naphthalene's molecular formula is twice its empirical formula, what would its molar mass be?

Question

Quizplus · Accepted Answer

The empirical formula of naphthalene is C5H4, with a molar mass of 64 u. Since the molecular formula is twice the empirical formula, the molecular formula is C10H8, with a molar mass of 128 u.

Naphthalene, Commonly Found in Mothballs, Is 93