Because the compounds<span> that make up </span>air<span> e.g. oxygen (o2), Carbon dioxide (co2) and water is a compound because the composition of water is fixed, H2 and 02 react to form water. </span>
Answer:
Electron pair acceptor- Lewis acid
Proton donor- Bronsted-Lowry acid
Provides H+ in water- Arrhenius acid
Explanation:
A Lewis acid is any specie that accepts a pair of electrons such as Al^3+, Fe^2+ etc.
A Brownstead Lowry acid is any specie that donates a proton, e.g H3O^+
An Arrhenius acid is a specie that provides in solution, that is, any specie that provides H^+ in solution.