How many grams of cacl2 are present in 25ml of a 0.500m solution?

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.

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

Which statement best describes the function of enzymes?