Which of the following represents the compound with the formula H2CO3?

The compound with the formula H2CO3 is correctly identified as carbonic acid. Carbonic acid is formed when carbon dioxide (CO2) is dissolved in water, a process that occurs naturally in various biological and environmental systems.

This particular formula indicates that there are two hydrogen atoms (H) bonded to the carbon (C) atom, along with three oxygen atoms (O). The structural arrangement leads to the recognition of carbonic acid's essential role in the bicarbonate buffering system in blood and its presence in carbonated beverages.

In contrast, formic acid is represented by the formula HCOOH, acetic acid corresponds to CH3COOH, and citric acid is identified by the formula C6H8O7. Each of these acids has different functional groups and structures that differentiate them significantly from carbonic acid. Thus, the identification of H2CO3 as carbonic acid is accurate due to the specific arrangement of its constituent atoms.