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One mole of a gas is defined as:...

One mole of a gas is defined as:

A

the number of molecules in one litre of gas

B

the number of molecules in one formula weight of gas

C

the number of molecules contained in 12 grams of (12 C) isotope

D

the number of molecules in 22.7 litres of a gas at S.T.P.

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The correct Answer is:
D
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