How much does the copper pipe weigh if it absorbs 8245.31 J of energy as it is heated from 12.7 C to 45.9 C

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.

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).