How many formula units are contained in 270.2 g of zinc nitrate, Zn(NO3)2? PLEASE HELP

Using data from seismic waves, geologists have learned that earth’s interior is made up of several

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

Nonpoint source pollution is difficult to control because it