グラム分ぶん子し

noun

gram molecule; mole

Chemistry term for the amount of a substance whose mass in grams is numerically equal to its molecular weight. Equivalent to the modern mole concept, though 'mole' is now more common.

• 1グラム分ぶん子しの水みずは約やく18グラムです。

  One gram molecule of water is about 18 grams.

• 化か学がくの授じゅ業ぎょうでグラム分ぶん子しの概がい念ねんを学まなんだ。

  I learned the concept of gram molecule in chemistry class.