What is G.M.V.?


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 gram atom?


It is the quantity in grams which is numerically equal to the atomic mass of an element on a.m.u. scale.

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What is SI unit of mole?


The mole is a base unit of the International System of Units (SI). Unit of mole is mol.

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What is a.m.u.?


One atomic mass unit is defined as a mass exactly equal to one twelfth the mass of one carbon - 12 atom.

1 amu = 1.66056×10–24 g

 

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Nitrogen forms five stable oxides with oxygen of the formulae N2O, NO, N2O3, N2O4, N2O5. This oxide formation explains which law of chemical combination?


Law of multiple proportion.

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