モル体たい積せきモルたいせきMeanings1nounmolar volumeScientific term used in chemistry and physics; the volume occupied by one mole of a substance.理り想そう気き体たいのモル体たい積せきは標ひょう準じゅん状じょう態たいで約やく22.4リットルです。The molar volume of an ideal gas is about 22.4 liters at standard conditions.