There are many signs that a chemical reaction is taking place. Which of the following is not one of these signs? There are many signs that a chemical reaction is taking place. Which of the following is not one of these signs? One of the substances melts. (Phase change) The container becomes much colder. (Temperature change) Tiny bubble appear on the metal. (Formation of a gas) A new color appears. (Color change)

Did you ever figue this

Ithink the answer is c but then again i'm probably wrong

Sorry i don’t know what to do

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.