Question

Calculate the No. of moles in $270g$ of Aluminium. (Atomic mass of $Al=27u$)

Answer 1

1 mole of any substance weighs about its atomic or molecular mass,

Then 1 mole of $Al$ weighs about $27$u

X moles mole of $Al$ weighs about $270$u

$x=\frac{270}{27}=10$