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

Question

Philoid · Accepted Answer

(a) The atomic mass of carbon atoms: 12

Thus, the mass of 5 moles of carbon atoms carried by Raunak:

m = Number of moles X Molar mass of given sample

= 5 × 12 = 60g

The atomic mass of sodium atoms:23

Thus, the mass of 5 moles of sodium atoms carried by Krish =

m = 5 ×23 = 115g

Thus, Krish’s container is heavier than Raunak’s container.

(b) The number of atoms = (Given mass)/(Molar mass)

(i) Raunak container (5 moles of carbon atoms):

Number of atoms =

(ii) Krish container (5 moles of sodium atoms):

Number of atoms =

Both containers have the same number of atoms.