Question

when placed into water, which formula represents hydrochloric acid?\
\\(\ce{hclo3}\\)\
\\(\ce{hclo4}\\)\
\\(\ce{hclo2}\\)\
\\(\ce{hcl}\\)

Explanation:

Hydrochloric acid is a strong acid formed when hydrogen chloride (HCl) gas dissolves in water. The formula for hydrochloric acid is HCl. The other options are different oxyacids: $\ce{HClO_3}$ is chloric acid, $\ce{HClO_4}$ is perchloric acid, and $\ce{HClO_2}$ is chlorous acid.

Answer:

D. HCl