Question 5 of 10 What must be the same on each side of a chemical equation, because of the
law of conservation of matter?
OAThe total number of elements
OB. The number of atoms of each element
OC. The number of molecules of each compound
OD. The total number of molecules
SUBMIT

The answer is  a.first and third quarters 

stands for electromotive force and it is measured in volts. despite its name, it is not actually the force in the sense of being a "pushing" or "pulling" (not measured in newtons).an equation that relates emf,  ℰ,  to a battery's terminal voltage, v, current, i, and internal resistance, r, is    ℰ = v + irin this case, the emf can be interpreted as a voltage—a difference in electric potential.i would not say that it would be considered an energy. if emf can be defined as the energy/work per a unit charge from a battery or other electric source, then it is not strictly energy.