What is the role of an indicator in an acid-base titration? in your answer, identify how an appropriate indicator is chosen and use the terms "end point" and "equivalence point" to explain how an indicator works.

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.

Several kinds of bears are found on earth. most bears are brown or black, but one type of bear, the polar bear, is white. what process led to this difference in fur color? explain your answer.

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon