Volume occupied by one gram molecular mass or one mole of a gas under standard conditions (273 K and 760 mm pressure) is called gram molecular volume (G.M.V). Its value is 22·4 litres for each gas.
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What is SI unit of mole?
Nitrogen forms five stable oxides with oxygen of the formulae N2O, NO, N2O3, N2O4, N2O5. This oxide formation explains which law of chemical combination?