Question

what is the mass of 4 moles of Al atom? (atomic mass Al = 27)

Answer 1

108 gms is the mass of 4 moles of Al atom.

Explanantion:

Atomic mass of 1 mole of Al atom is 27 gms

So mass of 4 moles of Al atom is = 27 x 4 = 108 gms

Answer 2

number of moles =mass/molar mass

1. so, mass=no. of moles *molar mass=4*27=108g