Which law says that the matter is composed of discrete particles which do not break up during a chemical change?

The species of an atom which possess different relative masses are called

The number of gram molecules of oxygen in molecules is

Law of constant composition was proposed by

Ratio of C_p and C_v of a gas 'X' is 1.4.  The number of atoms of the gas 'X' present in 11.2 L of it at NTP will be

Volume occupied by one molecule of water (density = 1 g cm^-3 ) is

Which law states that during any chemical or physical change, the total mass of the products obtained is always equal to the total mass of reactants taken at the beginning of the change ?

Number of moles of required to oxidise one mole of ferrous oxalate completely in acidic medium will be

Which law says that during any physical or chemical change, the matter is neither created nor destroyed. however, it may change from one form to another ?

The molecular weight of O₂ and SO₂ are 32 and 64 respectively.  At 15^o C and 150 mmHg pressure, 1 L of O₂ contains 'N' molecules.  The number of molecules in 2 L of SO₂ under the same conditions of temperature and pressure will be