Question

In which kin contain more atoms: 100 grams of sodium or 100 grams of iron {fay} {n} atom mass = 23u, atomic mass = 56 u}

Answer 1

Answer:

No.of moles in 100g Na

= given mass/ molecular mass

=100/23

= 4.3

No of atoms of Na

=no.of moles * Avagadro number

= 4.3 *NA

(NA = 6.02 * 10^23)

No.of moles of Fe

= 100/56

=1.78

No.of atoms of Fe = 1.78* NA

Hence sodium has more atoms.