Apotential energy diagram is shown.

a graph is plotted with potential energy in kj on the y axis and reaction pathway on the x axis. the graph starts at 150 on the y axis and it is initially horizontal, labeled reactants, and then rises up as a smooth curve and reaches its peak when y is 200 kilojoules. the curve comes down until y is 50 kilojoules where it becomes horizontal again, and it is labeled products.

what is the activation energy of this reaction?

50 kj
100 kj
150 kj
200 kj

the activation energy would be 200 kJ since we are looking an endothermic reaction.

Explanation:

50 kJ

Explanation: In the potential energy diagram, the energy level of reactants is 150 kJ. The energy level of activated complex(peak) is 200 kJ and the energy level of products is 50 kJ.

The difference in energy of products and reactants is known as enthalpy of reaction. Energy level of products is lower than reactants and it indicates an exothermic reaction.

Enthalpy of reaction  = 50 kJ - 150 kJ = -100 kJ

The difference in energy of activated complex and reactants is known as Activation energy.

Since the activated complex energy is 200 kJ and reactants energy is 150 kJ.

Activation energy = 200 kJ - 150 kJ = 50 kJ

Hence, the activation energy of the reaction is 50 kJ.

adding or remove a gaseous reactant or product changes the concentrations. if the concentration of reactant or product is increased, the system will shift away from the side in which concentration was increased (i.e. if the concentration of reactants is increased, the system will shift toward the products. if more products are added, the system will shift to form more reactants). conversely, if the concentration of reactant or product is decreased, the system will shift toward the side in which concentration was decreased (i.e. if reactants are removed, the system will shift to form more reactants. if the concentration of products is decreased, the equilibrium will shift toward the products).

explanation:

that's what i got you can count the number of atoms