Final answer:
Avogadro's number does not tell you the number of grams in a mole. The molar mass of a substance, which is measured in grams per mole, tells us the number of grams in a mole.
Step-by-step explanation:
Avogadro's number does not tell you the number of grams in a mole.
Avogadro's number, which is approximately 6.02 × 1023 mol-1, tells us the number of atoms or molecules in one mole of a substance.
However, the molar mass of a substance, which is measured in grams per mole, does tell us the number of grams in a mole. The molar mass of a substance is equal to the mass of one mole of that substance.