Question

Raunak took 5 moles of carbon atoms in a container and Krish also took 5 moles of sodium atoms in another container of same weight.
(a) Whose container is heavier?
(b) Whose container has more number of atoms?

Answer 1

(a) Mass of sodium atoms carried by Krish $=(5\times 23)g=115g$ while mass of carbon atom carried by Raunak $=(5\times 12)g=60g$.
Thus, Krish’s container is heavy.

(b) Both the bags have the same number of atoms, that is $5\times 6.022\times {10}^{23}$ or $30.11\times {10}^{23}$ atoms of carbon and sodium as they have same number of moles of atoms.