Question

which of the following samples has the largest number of atoms? (I) 1g of Ni (ii) 1g of Ca (iii) 1g of N2 (iv) 1g of Br

Answer 1

no. of moles = mass / molar mass

(i) for Ni  n= 1/59
(ii) for Ca n= 1/40
(iii) for N2 n= 1/28
(iv) for Br n= 1/80

 so largest value is 1/28  (N2)