Question

what do you need to know to convert moles to mass for any substance?
a. the substances atomic number
b. the substances molar mass
c. the substances volume
d. the substances density

Explanation:

To convert moles to mass, the formula \(m = n\times M\) is used, where \(m\) is mass, \(n\) is the number of moles, and \(M\) is molar mass. So, the molar mass of the substance is required. The atomic number (\(a\)) is related to the number of protons in an atom and not directly to mass - mole conversion. Volume (\(c\)) and density (\(d\)) are related to mass through the formula \(m=
ho\times V\) (where \(
ho\) is density and \(V\) is volume), but this is a different relationship than the mole - mass relationship.

Answer:

B. The substance’s molar mass