List of top Chemistry Questions on Mole concept and Molar Masses asked in PGIMER

The number of gram-molecules (moles) of oxygen present in 6.02 x 1024 molecules of CO is:
The number of atoms in 21.6 g of Ag (atomic mass of Ag = 108) is equal to the number of molecules present in:
Equal masses of O2, H2 and CH4 are kept under identical conditions of temperature and pressure. The ratio of the volumes occupied by them is:
The mass of one Avogadro number of helium atoms is: