What is one reason the carboxyl groups are often written as -COOH instead of -CO2H?

This image is an example of a(n) a) atom. b) compound. c) mixture. d) molecule.

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.

What is the oxidation state of each individual carbon atom in c2o42−?