Calculate the number of atoms of each kind in 5·3 g of Na2CO3.
Formula mass of Na2CO3
Gram formula mass of Na2CO3 = 106 g
Now 106 g of Na2CO3
Now one formula unit of Na2CO3 contains 2 atoms of sodium, 1 atom of carbon and 3 atoms of oxygen.
No of carbon atoms in 5.3 g of 
No. of oxygen atoms in 5.3 g of 
