Name two useful materials obtained from fractional distillation of petroleum

Summarize possible ways in which phases of matter could combine to form a solution.

Diffraction is when light is bent around obstructions. which of the these observation about clouds would indicate diffraction? a) after rain storms, you can sometimes see rainbows. b) clouds are white or gray and cannot be seen through. c) on a cloudy day, the temperature tends to be cooler than a sunny day. d) the edges of dark clouds appear lighter. this

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.