Final answer:
Avogadro's number is a fundamental constant in chemistry that represents the number of atoms or molecules in one mole. If pound moles were used instead of grams, Avogadro's number would be larger by a factor of 454.
Step-by-step explanation:
Avogadro's number is a fundamental constant in chemistry that represents the number of atoms or molecules in one mole of any substance. If the American system used pound moles instead of grams, Avogadro's number would be larger by a factor of 454. A mole of hydrogen atoms would weigh 1 gram and contain 6.022 × 1023 atoms.