How many miles are there in 27 grams of aluminum?

Aluminum Al2713 has an atomic molar mass of 27 grams per mole.

Al has 13 protons (hence number 13) and it most common isotope 14 neutrons for a total mass of 27 amu. (The 13 electrons add no measurable mass to the atom)

Take the grams and divide by the molar mass

= 2 moles