How many moles of NaCl, if mixed with excess Pb2+ ions in solution, would be needed to form 12.8 g of PbCl2?

Your roll: experienced electron speech is adressed to: a new "freshman class" of electrons job: write a speech task: you are to pretend that you are giving a speech to a new group of electrons. be sure to mention their placement in an atom, their charge, and their role in chemical bonding (ionic and covalent) be specific!

Stage in which a typical star has completely stopped fusion

How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?