Reforming of crude oil Whiteboard exercise Play

Reforming of crude oil Student activity Play

Relative abundance of isotopes and mass spectra Student activity Play

Relative atomic mass Animation Play

Relative atomic mass Student activity Play

Relative atomic mass Student activity Play

Relative molecular mass Student activity Play

Relative molecular mass Animation Play

Relative molecular mass Student activity Play

Resonance energy for benzene Animation Play

Reversible and irreversible processes Student activity Play

Reversible and irreversible reactions Student activity Play

Reversible reaction Animation Play

Rupture of the DNA molecule Slideshow Play

Salts Student activity 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

Salts of weak acids and weak bases Animation Play

Saturated and unsaturated compounds Animation Play

Sea water Student activity Play

Secondary structure of proteins Student activity Play

Sensors Animation Play

Shapes of organic molecules Student activity Play

Sigma (σ) bond Whiteboard exercise Play