The chemical equation below represents a reaction between an acid and a metal. Zn + 2 HCl → ZnCl2 + H2 How many moles of HCl would be required to produce 2 moles of hydrogen gas?

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

Energy defines the different "states" of matter. in no more than 3 sentences, describe the amount of kinetic energy that each of the 3 states of matter possesses and relate that to the atom/molecular motion of each "state".

Convert .347 kilometers to miles show your work