Arock is weighing 15.0 grams is placed in a graduated cylinder, displacing the volume from 25.0 ml to 36.2 ml what is the density of the rock in gram/cubic centimeter ?

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.