Answer:
16.5gm of Sr(strontium) has 1.12 x10^23 atoms...26.5 gm of Fe(iron) has 2.84 x10^23.... 7.73 gm of Bismuth has 2.22 x10^22.....36.4gm of Phosphorus has 7.06 x10^23
Explanation:
by the formula,
Moles=[tex]\frac{no of atoms}{Avogadro's No}[/tex]
you could find moles by
Moles = given mass/atomic mass
Put the value of moles and multiply it by Avogadro's no you will get the following answers
