Sulfur dioxide is produced from zinc sulfide when it reacts with oxygen. If the typical yield is 86.78%, what mass of SO2 should be expected if 4897 g of ZnS is used?

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 would be a

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.