What is the chemical formula for hydrobromic acid?

Hydrobromic acid is a binary acid formed by hydrogen and bromine. Its chemical formula represents the simplest ratio of these two elements in the compound. The formula HBr indicates that one atom of hydrogen is combined with one atom of bromine, which is characteristic of hydrobromic acid.

In aqueous solutions, hydrobromic acid dissociates completely into H⁺ ions and Br⁻ ions. This complete dissociation is typical of strong acids. The other choices consist of formulas that imply different ratios or amounts of hydrogen and bromine which do not accurately represent hydrobromic acid. Consequently, HBr is the only correct representation for hydrobromic acid, confirming its identity in both molecular terms and when considering its behavior in solution.