Answer:
C: It is the difference between the total kinetic and potential energy in a system.
Explanation:
<h2>
Answer:</h2>
<h3>Hg2 ( NO2 )2</h3>
<h2>Explanation:</h2>
<h3>Formula of mercury ( 1 ) dioxonitrate 111 is Hg2 ( NO2 )2//</h3>
At higher temperature, and lower pressure.
I believe it is C; reasoning being that the hint for physical change is," the producing of a gas," chemical "that's new and diff. substance. "
The answer would be the third one listed, Refraction
