Answer:
The answer is D
Step-by-step explanation:
A. Can be calculated using the elements’ atomic mass in the periodic table.
This is wrong because is is not including all the correct answers (B is also correct not only A).
B. It is the mass in grams of one mole of any pure substance
This is wrong because is is not including all the correct answers (A is also correct not only B)
C. Has the unit of mol/g
This is wrong because the unit is g/mol. It cannot be mol/g because that would mean that the formula for molar mass is the number of moles/the mass (in grams), but the formula is the mass (in grams)/the number of moles.
D. A and B
This is correct as it is the definition of molar mass. It can also be seen in the unit g/mol (the mass in grams per mole), and you can calculate the molar mass with atomic mass by writing the atomic mass and adding the unit g/mol. It includes all the correct answers (both A and B)