Nitrogenous waste products Slideshow Play

Nomenclature of inorganic compounds and ions Student activity Play

Nomenclature of polyatomic ions Animation Play

Non-aqueous acid–base reactions Student activity Play

Nucleophiles as Lewis bases Animation Play

Nucleophilic substitution reactions in haloalkanes Student activity Play

Number of moles of ammonia molecules Animation Play

Number of solutions for the system of linear equations Student activity Play

Number of solutions for the system of linear equations Whiteboard exercise Play

Number of solutions of a system of linear equations Whiteboard exercise Play

Number of solutions of the linear equation Whiteboard exercise Play

Octahedral ammine-metal complexes Animation Play

Odour Animation Play

Organic compounds in the cosmos Slideshow Play

Origin of crude oil (1) Student activity Play

Origin of fossil fuels Student activity Play

Osmosis Animation Play

Osmosis Student activity Play

Osmosis in animal cells Student activity Play

Osmosis in plant and animal cells Student activity Play

Osmosis in plant and animal cells Whiteboard exercise Play

Other physical properties of alkanes Student activity Play

Other uses of halogens and their compounds Student activity Play

Other ways to accelerate chemical reactions Student activity Play

Oxidation and reduction reactions Student activity Play