You are doing an experiment that involves putting 5.2g of potassium iodide and lead nitrate together. A precipitate of lead iodide is formed, and has a mass of 3.5 g, as well as potassium nitrate, which has a mass of 6.9g. How much lead nitrate was used?

Aluminum–lithium (al-li) alloys have been developed by the aircraft industry to reduce the weight and improve the performance of its aircraft. a commercial aircraft skin material having a density of 2.47 g/cm3 is desired. compute the concentration of li (in wt%) that is required.

Nonmetal halogen family atmoic mass 35

Which metal exist in liquid state and can be cut with knife ?