The density of a substance is 1.63 g/mL what is the mass of 0.25 L of the substance in grams

Arollercoaster car at the top of a hill has potential energy kinetic energy chemical energy light energy

Consider the elements bromine and chlorine; which elements has a larger ionic radius ?

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