化か学がく式しき

noun

chemical formula

Refers to a representation of a chemical substance using element symbols and numbers, such as H₂O or NaCl.

• 水みずの化か学がく式しきはH₂Oです。

  The chemical formula of water is H₂O.

• この化か学がく式しきを見みて、何なんの物ぶっ質しつかわかりますか？

  Looking at this chemical formula, can you tell what substance it is?