The Total solution for NCERT class 6-12
Calculate the number of atoms in each of the following (i)52 moles of Ar (ii) 52 u of He (iii) 52 g of He.
(i)┬а1 mole of Ar = 6.022 ├Ч 1023┬аatoms of Ar
52 mol of Ar = 52 ├Ч 6.022 ├Ч 1023┬аatomsof Ar
= 3.131 ├Ч 1025┬аatoms of Ar
(ii)┬а1 atom of He = 4 u of He
Or,
4 u of He = 1 atom of He
= 13 atoms of He
(iii)┬а4 g of He = 6.022 ├Ч 1023┬аatoms of He
.52 g of He┬аatoms of He