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C13 enthalpy change

C14 rates of reactions

C06 concentration of solutions and volumetric analysis

C05 the mole concept

C04 elements and compounds

C03 relative masses of atoms and molecules

C07 chemical bonding

C08 mixtures and separations

C22 non metals

C20 extraction of metals

C19 metals and their reactivity

C26 pollution

C18 polymers

C17 carbon compounds

C16 alcohols and carboxylic acids