Describe how the interaction of matter and light affects what uou see when you look at a wondow a lake and a tree

Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in the n=3 level to an orbital in the n=7 level.

What’s the percent by mass of carbon in c10h14n2

Anitrogen atom and an oxygen atom combine chemically to form nitric oxide. what is nitric oxide?