What is the energy of a photon of light with a wavelength 2.11 x 106 m?

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

Describe the interaction that occurs between two objects with the same electrical charge.

What is a main difference between a mixture and a pure substance? a mixture is only a liquid, but a pure substance can be in any state. a mixture looks the same throughout, but a pure substance does not.1 a mixture can vary in composition, but a pure substance has a set composlo a mixture can be made up of a single compound, but a pure substance car