Fundamentals of Chemistry:
General Introduction: Importance and scope of Chemistry. Atomic and molecular masses, mole concept and molar mass, percentage composition, empirical and molecular formula, chemical reactions, stoichiometry, and calculations based on stoichiometry.
06 | Concept Of Valency and Symbols | Basic definitions | Unit#1 Chemistry Class 9
This chapter touches upon topics such as the importance of chemistry, atomic mass, and molecular mass, and much more.