7. A urine sample has a density of 1.030 g/mL. What is the specific gravity of the sample? The density of water is 1.00 g/mL.

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.

level 4 to level 2 : ))