to convert the moles of a substance into grams, divide it by the molar mass.\na true\nb false

Brief Explanations:

To convert moles of a substance to grams, you multiply the number of moles by the molar mass, not divide. For example, if you have $n$ moles of a substance with molar mass $M$, the mass $m$ in grams is $m = n\times M$.

Answer:

B. FALSE