Some Basic Concepts of Chemistry

Among the following, choose the ones with an equal number of atoms.

A. 212 g of $\mathrm{N}{\mathrm{a}}_2\mathrm{C}{\mathrm{O}}_3(\mathrm{s})$ [molar mass = 106 g]

B. 248 g of $\mathrm{N}{\mathrm{a}}_2\mathrm{O}(\mathrm{s})$ [molar mass = 62 g]

C. 240 g of NaOH(s) [molar mass = 40 g]

D. 12 g of ${\mathrm{H}}_2(\mathrm{g})$ [molar mass = 2 g]

E. 220 g of $\mathrm{C}{\mathrm{O}}_2(\mathrm{g})$ [molar mass = 44 g]

Choose the correct answer from the options given below: