In general, how do we know which methods (Crystalisation or Evaporation to dryness) to obtain the pure crystal of a salt?
Water gas, a mixture of Carbon Monoxide and Hydrogen, is prepared by passing Steam over heated Carbon. Energy is absorbed during the process. i) Is the process Endothermic or Exothermic? ii) Construct a balanced equation for this reaction. iii) Calculate
Phosphorus and nitrogen are both in Group V of the Periodic Table. Which ions are produced when phosphine, PH3, dissolves in water?
State the connection between relative molecular mass of a gas & its rate of diffusion
Explain why the bond length of the following compounds is as followed: HF 92pm HCl 127pm HBr 141pm HI 161pm