Question: What do brackets in an chemical equation mean?
Answer: chemical molecular formula
Disambiguated annotations:
qaPairs: question: What do square brackets in an chemical equation mean for molecules?
answer: chemical molecular formula
used around the chemical molecular formula
question: What do round brackets in an chemical equation mean?
answer: Molecules with multiple functional groups that are the same
question: What do square brackets in an chemical equation mean for ions?
answer: used to enclose the ionic formula