Asmall helium tank measures about two feet high. yet it can fill over 50 balloons! how can such a small tank contain enough helium to fill so many balloons?

Which statements describe polyatomic ions? check all that apply. polyatomic ions have many charges. polyatomic ions have one overall charge. polyatomic ions repel other ions to form ionic bonds. polyatomic ions attract other ions to form ionic bonds. polyatomic ions are made up of only one type of atom. polyatomic ions are made up of two or more types of atoms.

This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.

Compare and contrast refraction of light and sound will give brainliest