Balancing equations demonstrates the fundamental law of the conservation of mass. It shows that you cannot create or destroy mass in a chemical reaction, so the mass stays constant.
A. Solutions is the right answer
Valence electron is the electron that located in the outermost layer of an atom or compound. The molecule NO is composed of 1 nitrogen and 1 oxygen. Nitrogen has 5 valence electrons and oxygen has 6 valence electrons. The valence electron of the compound would be: N + O= 5+6= 11
