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?

Explanation

a) 1 mole= molar mass of a substance.
`therefore` 1 mole of carbon atoms weigh = 12g
`therefore` 5 moles of carbon atoms will weigh = `12 xx 5=60`g
Hence, Raunak's container has weigh=60g
In the same way,
`therefore` 1 mole of sodium atoms weigh = 23 g
`therefore` 5 moles of sodium atoms will weigh = `23 xx 5=115`g
Hence, Krish's container has weigh = 115g
Thus, Krish's container is heavier than Raunak's container.
As, 1 mole =`6.022 xx 10^(23)` atoms
b) Here, both container have 5 moles of each carbon and sodium, therefore, both containers have equal number of atoms, i.e., `5 xx 6.022 xx 10^(23)` atoms.
or `3.011 xx 10^(24)` atoms in each.