Equal volumes of different gases under similar conditions of temperature and pressure contain equal number of _______

Thermodynamic standard conditions of temperature and pressure are

Equal volumes of different gases at a fixed temperature and pressure :

The most favourable condition of temperature and pressure for the oxidation of SO_2 into SO_3 are

One volume of a gaseous compound containing carbon, hydrogen, and oxygen was burnt in the presence of 2 volumes of oxygen. The resultant gases contained 2 volumes of carbon dixoide and 2 volumes of steam. Find the molecular formula of the compound, if all the volume were measured under the same conditions of temperature and pressure.

The molar masses of oxygen and sulphur dioxide are 32 and 64 respectively. If 1 L of oxygen at 25^@C and 750 mm Hg pressure contains N molecules, then the number of molecules in 2 L sulphur dioxide under the same conditions of temperature and pressure is :

Two flasks A and B of equal volume contain 2 g of H_2 and 2 g of N_2 respectively at the same temperature and pressure. The number of molecules in flask A is :