Question

how do you convert grams of a substance to moles? a divide the mass by the molar mass. b use avogadros number directly. c subtract the molar mass from the mass. d add the mass to the molar mass. e multiply the mass by the molar mass.

Explanation:

The formula to convert mass (m) of a substance to moles (n) is $n=\frac{m}{M}$, where M is the molar mass. So, you divide the mass by the molar mass.

Answer:

A. Divide the mass by the molar mass.