[size=1]Number of atoms in 45.6 gms of Aluminium will be[size=1][size=1]=10.17218×1023[/size][/size][/size]
Explanation:
[size=1]Atomic weight of Aluminium is =2t7.0gms
According to the concept of Avogadro's number
Number of atoms in 27.0 gms of Aluminium will be 6.023x1.^23
Number of atoms in 45.6 gms of Aluminium will be[/size]
[size=1][size=1][size=1]45.6[/size][/size][/size]
[size=1][size=1][size=1]27.0[/size][/size][/size]
[size=1][size=1][size=1]×6.023×1023[/size][/size][/size]
Number of atoms in 45.6 gms of Aluminium will be
[size=1]=10.17218×1023[/size]