How many value of amplitude are there in one wavelength of a wave and how is the amplitude related to the energy of a wave?

-- Frequency and wavelength are inversely proportional. Their product is constant,

and is the speed of the wave. They're entirely unrelated to amplitude or energy.

-- A wave with greater amplitude carries more energy than one with smaller amplitude does.

-- IF your wave happens to be an electromagnetic one, THEN the energy carried by

each quantum is proportional to the frequency.