Calculate the empirical formula for each of the following stimulants based on their elemental mass percent composition. adenine (a nucleobase (a purine derivative) with a variety of roles in biochemistry): C 44.44%, H 3.73%, N 51.83%

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