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General Chemistry

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Question
7 out of 14
 

If m represents the number of moles of a substance, M represents the molar mass of the substance, and d represents the density of the substance, which of the following expressions equals to the volume of the sample substance?

A mM/D
B m/dM
C d/mM
D m/d
Ans. A Density is equal to mass per volume. Further more, the mass is equal to the product of number moles and molar mass. Equating these two equations we can get the answer. Using the letter notations given in the question, the expression of volume is given by Choice A.

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