A hydrate of sodium sulfide has the following formula: Na2S⋅xH2ONa2S⋅xH2O. The water in a 3.41-g sample of the hydrate was driven off by heating. The remaining sample had a mass of 1.58 g. Find the number of waters of hydration (x) in the hydrate.

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.

Which piece of equipment would me most useful for measuring the volume of some water? a. pan balance b. graduated cylinder c. tweezers d. flask quick

Match the mixture with the substance// i really need on this guys (it’s a pic btw)