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The Loschmidt number is the number of

$(a)\;\text{molecules present in 1.c.c of a gas at STP} \\ (b)\;\text{molecules in 1 gram mole of a gas at STP} \\(c)\;\text{ atoms present in 1mL of a gas at STP} \\(d)\;\text{ atoms present in 1 gram mole of a gas at STP} $

1 Answer

Loschmidt number is the number density an ideal gas at STP.
It is similar to the Avogadro's number, Only difference is that it being reserved for the number of molecular a cubic centimeter at STP.
Hence a is the correct answer.
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