The number of molecules in 1 L of oxygen and 1 L of nitrogen at STP will be:
A
equal
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B
greater for N2
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C
greater for O2
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D
equal to Avogadro's number
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Solution
The correct option is A equal Equal volumes of different gases under identical conditions of temperature and pressure contains equal number of molecules. (Avogadro's law)
1 mole = 22.4 litre
Hence, the number of molecules in 1 L of oxygen and 1 L of nitrogen will be equal at STP.