Dive into the fundamentals of chemical reactions and stoichiometry in this comprehensive Grade 9 Chemistry tutorial. Learn essential concepts including chemical equation balancing using inspection and LCM methods, explore algebraic approaches to balancing equations, and understand the differences between endothermic and exothermic reactions. Designed to align with the Ethiopian Grade 9 Chemistry curriculum, this 2.5-hour tutorial provides a thorough foundation in Unit 4, equipping students with the knowledge and skills necessary to excel in their chemistry studies.