According to the graph, which of the these remains constant throughout? a) total amount of energy b) potential energy c) kinetic energy d) time

A

Explanation:

Although you don't have the graph, I can predict the answer based on the first law of thermodynamics which is basically energy is always constant, it can never be created nor destroyed. So, its basically principle of conservation of energy where energy just changes form but total energy is constant.

Hope this helps!

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.

2b2t

explanation:

2b2t