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Stoichiometry Percentage Composition and Molecular Mass

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A compound contains two carbon atoms per molecule and is 40% carbon by mass. Its molecular mass may be:

Verified Answer & Explanation⌄

Correct Answer: B) 60 u

Concept Explanation

Mass contributed by two carbon atoms = 2 × 12 = 24 u. If 24 u is 40% of the molecular mass: M = 24/0.40 = 60 u.

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