A candle burning is an example of . a physical change

an exothermic change

energy being taken in

an endothermic change

Using complete sentences, explain how to predict the products and balance the reaction between sulfuric acid and potassium hydroxide.

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

When water dissociates, each water molecule splits into a hydroxide ion and a) h 3 o + b) a hydrogen atom c) a hydrogen ion d) h 2 o e) oh —