Some data List of constant Electrochemical series Electromagnetic Spectrum Periodic trends Bond energies (D) Water vapor pressure table (5 sig.fig.) Water density, specific heat and vapor pressure Water-Ethanol mixture data The pH scale and color change of some indicators Ka and Kb of some acids and bases Solubility of some compounds in water Ksp of some ionic complexes Thermodynamic data: heat of formation Thermodynamic data: heat of solution

Useful links Interactive periodic table Chemical glossary Unit conversion online Scientific calculator (including chemical compounds) RPN calculator (HP-15C vintage) Quadratic equation solver  (0 = ax2 + bx + c) SI units and rules