Final answer:
Gunpowder is a substance found at a crime scene that might contain nitrites.
Explanation:
Nitrites are compounds that contain the nitrite ion (NO2-), which is derived from nitrous acid. At a crime scene, gunpowder is a substance that might contain nitrites. Gunpowder, known for its explosive properties, can contain potassium nitrate, which is a source of nitrites.
Learn more about substances containing nitrites here:
https://brainly.com/question/36488168
