Question

Write and explain about Avogadro's law.

Answer 1

Avogadro's Law is the relation which states that at the same temperature and pressure, equal volumes of all gases contain the same number of molecules.  

Avogadro's law also means the ideal gas constant is the same value for all gases.  

Hence, k = V/n  

where k is a proportionality constant, V is volume of a gas, and n is the number of moles of a gas.

Answer 2

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Avogadro's law states that "equal volumes of all gases, at the same temperature and pressure, have the same number of molecules." ... As an example, equal volumes of molecular hydrogen and nitrogen contain the same number of molecules when they are at the same temperature and pressure, and observe ideal gas behavior.