Final answer:
The mass of 1.0 mole of a compound with a gram-formula mass of 48 grams is 48 grams, as the molar mass and the mass of 1 mole are numerically equivalent.
Step-by-step explanation:
The question involves determining the mass of 1.0 mole of a compound when the gram-formula mass is given to be 48 grams. By definition, the molar mass (M) is the mass of 1 mole of a chemical substance, which is numerically equivalent to the formula weight in atomic mass units (amu). Since 1 mole of any substance has a mass numerically equal to its molecular or formula mass in grams, for a compound with a gram-formula mass of 48 grams, the mass of 1.0 mole would also be 48 grams.