Real gases Student activity Play

Reasons for the high reactivity of alkenes Whiteboard exercise Play

Reasons for the high reactivity of alkenes (1) Student activity Play

Reasons for the high reactivity of alkenes (2) Student activity Play

Reforming of crude oil Student activity Play

Reforming of crude oil Whiteboard exercise Play

Relative abundance of isotopes and mass spectra Student activity Play

Relative molecular mass Animation Play

Relative molecular mass Student activity Play

Removal of inorganic salts from wastewater Animation Play

Replacing soil minerals Student activity Play

Resonance energy for benzene Animation Play

Reversible and irreversible reactions Student activity Play

Reversible reaction Animation Play

Role of anions in plant cells Slideshow Play

Role of cations in plant cells Slideshow Play

Role of macro-elements absorbed as anions Whiteboard exercise Play

Role of macro-elements absorbed as anions Student activity Play

Role of macro-elements absorbed as cations Student activity Play

Rupture of the DNA molecule Slideshow Play

Salts of strong acids and weak bases Whiteboard exercise Play

Salts of strong acids and weak bases Student activity Play

Salts of weak acids and weak bases Student activity Play

Sample formulae Illustration Play

Saturated and unsaturated compounds Animation Play