The diagram provided here shows the reactants and the products of a common chemical reaction. The line on the graph behind them represents the energy of a system as the reaction progresses. Which of the following conclusions is best supported by the information provided? O Because there was a change in energy, the equation must not be balanced
O the overall mass of the system increased when the reaction occurred
O This reaction required the addition of energy from the surroundings
O During the reaction the energy was converted to mass, and, therefore, was lost