What will happen if you study the diffusion of particles in a liquid using hot water?

Which states of matter have particles that move independently of one another with very little attraction?

As light moves from one material into the next, which of the following affects how much the light waves will refract, or bend? angle at which the ray strikes the medium color of the material density of the material temperature of the light wave

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