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# Loschmidt number is the number of:(This question has multiple answers)A.Molecules present in 1mL of a gas at STPB.Molecule present in 1 gram mole of a gas at SWC.Atoms present in 1 mL of a gas at STPD.Atoms present in 1 gram mole of a gas at SW

Last updated date: 24th Jun 2024
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Hint: We can define Loschmidt number as the number of molecules in one cubic centimetre of an ideal gas at standard temperature and pressure, equal to $2.686{\text{ }}X{\text{ }}{10^{25}}$.
Let’s start with defining Loschmidt number, Loschmidt number is defined as the number of atoms/molecules of an ideal gas in a given volume. Its quoted value is $2.686{\text{ }}X{\text{ }}{10^{25}}$ per cubic meter at and $1{\text{ }}atm$ pressure.
So according to the definition the answer to the question will be Molecules present in $1{\text{ }}ml$ of gas at STP and Atoms present in $1{\text{ }}ml$ of a gas at STP as $1{\text{ }}ml$ of molecular gas at STP contains approximately $2.7{\text{ }}X{\text{ }}{10^{19}}$ molecules per cubic centimetre which is same as $2.686{\text{ }}X{\text{ }}{10^{25}}$ molecules per cubic meter.
So, the answers to this question are option A. Molecules present in $1{\text{ }}ml$ of a gas at STP and option C. Atoms present in $1{\text{ }}ml$ of a gas at STP.