Which of the following is the correct chemical formula for hydrobromic acid?

• A. HBr
• B. HBrO_3
• C. H_2Br
• D. HBrO

Answer: (A)

Verified step by step guidance

1. Understand that hydrobromic acid is a binary acid composed of hydrogen and bromine without oxygen atoms.
2. Recall that binary acids have the general formula HX, where H is hydrogen and X is a halogen element like bromine.
3. Identify the correct formula by recognizing that HBr represents hydrogen bromide in aqueous solution, which is hydrobromic acid.
4. Eliminate options containing oxygen atoms (HBrO_3 and HBrO) because hydrobromic acid does not contain oxygen.
5. Confirm that H_2Br is not a valid formula because bromine typically forms one bond with hydrogen in acids, so the correct formula is HBr.