Question

What is the number of moles of aluminum in 54 g of Al?

Answer 1

2 moles

Explanation:

Aluminum `Al_13^27` 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

`(54/1)/ (27/1)` = 2 moles