Pure water contains only water molecules that interact strongly with each other due to their , which are graphically depicted as δ+ and δ−.

The answer to this question would be: partial charge.
Water chemical formula is H2O which can be divided into H+ and OH- ion. This was the acid/base basis. Acid is when the H+ ion is more than OH- ion. Since water is having both ions, water itself will be neutral because the amount of H+ and OH- should be same. 

1) the mayans built pyramids just like the egyptians. the mayans also used hieroglyphics like them.2) power was passed down by family. for example, if the father dies, the son would be the next king.3)they both built pyramids for their structures.4)the main crop for the mayans was maize.5)they also grew manioc, beans,  squash,  amaranth, and chile peppers.

They use the si unit, or metric system its all the same thing