A piece of metallic indium with a mass of 15.456 g was placed in 49.7 cm of ethanol in a graduated cylinder. The
ethanol level was observed to rise to 51.8 cm. From these
data, the best value one can report for the density of indium is

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.

Calculate the number of molecules present in 0.750 mol of mgo.

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains