Why do solids have different densities

Which best describes why nh4+ can form an ionic bond with ci-?

Determine the percent sulfuric acid by mass of a 1.61 m aqueous solution of h2so4. %

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