Mathematics is the language of science, and numbers are at the heart of all chemical sciences-understand the numbers, and you'll have a better understanding of the science. Chemistry in 100 Numbers explores the most important and interesting numbers in chemistry, starting with the lowest number ( -92.4, which is the 'negative' enthalpy of the Haber process measured in kilojoules and moles) and working in numerical order up to the very largest (6.0221367 x 1023, which is Avogadro's number of particles in exactly 12 grams of carbon-12).