A sample of He is at 16.0C in a 11.9 liter container. It is at a pressure of 892.2 mmHg. How many grams of helium gas are present?

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.

the answer is symmetrical : )