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abstraction > mathematical concept > number > constant > fundamental physical constant > physico chemical constant > molar gas constant

molar gas constant comparison table

Subject	is an instance of	has uncertainty	is a kind of	has symbol	has value
physico chemical constant			fundamental physical constant		changes in value are due solely to an increase in measurement accuracy or convention
molar gas constant	physico chemical constant	0.000015 J mol-1 K-1		R	8.314472 J mol-1 K-1

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