NAPLEX Practice Exam 2025 – Comprehensive Test Preparation

Question: 1 / 1820

How are moles (mols) calculated?

mg/MW

g/MW

The formula for calculating moles (mols) is mass (g) / molar mass (MW). Option A, mg/MW, is incorrect because the units do not cancel out to give moles. Option C, (mg x valence) / MW, is incorrect because it only applies to ionic compounds with a defined valence. Option D, Q1 = Q2 x C2 / C1, is incorrect because it is a formula for calculating concentration, not moles.

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(mg x valence) / MW

Q1 = Q2 x C2 / C1

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