APFIVE Calculating Moles From Mass
All of the following statements regarding the conversion of a substance’s mass in grams to its amount in moles are true EXCEPT:
A
The formula $$\text{moles} = \text{mass (g)}/\text{molar mass (g/mol)}$$ correctly relates the mass of a substance to the number of moles.
B
Dividing the given mass in grams by the atomic weight (molar mass in g/mol) yields the number of moles.
C
Unit consistency is crucial; the molar mass must be expressed in grams per mole for the conversion to be valid.
D
To convert grams to moles, one must multiply the mass in grams by the molar mass.
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