Question

which of the following elements are in the compound: *
citric
acid

hydrogen (h), helium (he), and cobalt (co)
sodium (na) and helium (he)
carbon (c), hydrogen (h), and oxygen (o)

Explanation:

The chemical formula of citric acid is \(C_6H_8O_7\). From the formula, we can see that the elements present are Carbon (C), Hydrogen (H), and Oxygen (O). The first option has Helium (He) and Cobalt (Co) which are not in the formula. The second option has Sodium (Na) and Helium (He) which are also not in the formula. Only the third option has the correct elements as per the formula \(C_6H_8O_7\).

Answer:

C. Carbon (C), Hydrogen (H), and Oxygen (O)