Which has more number of atoms-100 g of sodium or 100g of iron? Justify your answer.( atomic mass of sodium=23u ,atomic mass of iron=56u) (AS-1)

1 g-atom of sodium is equivalent to

Calculate the number of atoms in 56u of He atom (Atomic mass of He = 4u).

Sodium crystallises in body centred cubic unit cell. What is the approximate number of unit cells in 4.6 g of sodium ? Given that the atomic mass of sodium is 23 g mol^(-1) .

Calculate the atomic volume of sodium (atomic mass=23) if density be 0.972 g- cm^(-3) .

Find the mass of carbon that contain the samme number of atoms as contained by 560g of iron (atomic mass=56).

Find the number of (1) atoms and (2) molecules present in 1 g of oxygen.

8 g of oxygen has same number of atoms in :

Calculate the number of unit cells in 8.1 g of aluminium if it crystallises in face-centred cubic (fcc) structure. (Atomic mass of Al = 27 g*mol^(-1) )