How many ammonium ions and how many sulfate ions are present in an 0.370 mol sample of (nh4)2so4?

What is the standard unit of measure for acceleration?

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins

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