Data scaling and standard deviation Whiteboard exercise Play

Decomposition of ammonia on a metal surface Animation Play

Decomposition of calcium carbonate Animation Play

Decomposition of hydrogen iodide Animation Play

Decomposition of hydrogen peroxide Animation Play

Density and pressure Animation Play

Density and the molecular structure of matter Chart Play

Density and the molecular structure of matter Student activity Play

Density and the molecular structure of matter Whiteboard exercise Play

Density of gases Animation Play

Density of gases Animation Play

Deposition Animation Play

Determination of enthalpy change in combustion reactions Whiteboard exercise Play

Determination of enthalpy change in combustion reactions (1) Student activity Play

Determination of enthalpy change in combustion reactions (2) Student activity Play

Determination of reaction rate by measuring the volume or pressure of the gas evolved Student activity Play

Determining the enthalpy of solution of sodium hydroxide Animation Play

Determining the relative molecular mass Animation Play

Development of technology and crop yields Slideshow Play

Diffusion Student activity Play

Diffusion Student activity Play

Diluting concentrated sulphuric(VI) acid with water Animation Play

Dilution of concentrated acids Student activity Play

Dispersion forces in halogens Animation Play

Dissipation of heat Animation Play