a. Krish's container is heavier than Raunak's container.
b. Both container have the same number of atoms.
Explanation:
The molar mass of any element is equivalent to one mole of that substance.
weight of 1 mole of carbon atom is 12 g and weight of 1 mole of sodium atoms is 23 g.
So, the mass of 5 moles of carbon atoms
12 x 5 = 60 g
In this same way,
the mass of 5 moles of sodium atoms
23 x 5 = 115g
From this, we can say that Krishna’s container is heavier.
b. One mole of a carbon atom has 6.022 x 10^23 atoms and one mole of sodium also has 6.022 x 10^23 atoms.
So, 5 moles of carbon and sodium contains the same number atoms which are
5 x 6.022 x 10^23
= 3.011 x 10^24 atoms.