i'm so confused with how to do these someone please help

Question

calculate the number of moles in each of the following masses
a)64.1 g of aluminum
b)28.1 g of silicon
c)0.255 g of sulfur
d)850.5 g of zinc

Answer 1

mols = grams/atomic mass.
Just look up the atomic mass on the periodic table, plug in the number and grams, and calculate. Piece of cake. Nothing to be confused about.

Answer 2

so how would a be done for example?

Answer 3

64.1 divided by the atomic mass of aluminum = answer