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Loschmidt constant comparison table
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physico chemical constant     changes in value are due solely to an increase in measurement accuracy or convention fundamental physical constant   
Loschmidt constantJ. Loschmidt (1821-1895)18650.0000047 × 1025 m-3This is the number of molecules in a cubic metre of an ideal gas at s.t.p. It is equal to the Avogadro constant divided by the molar volume. In Germany it is sometimes called Avogadro's constant.2.6867775 × 1025 m-3n0 physico chemical constant273.15 K101.325 kPa

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