Select the correct answer.
Which mathematical relationship should you use to convert moles of a substance into grams?

A.
mass in grams = number of moles · molar mass in g/mol

B.
`"mass in grams" = ("number of moles")/ ("molar mass in g/mol")`

C.
`"mass in grams" = ("molar mass in g/mol")/ ("number of moles")`

D.
mass in grams = molecular weight · molar mass in g/mol