What does it mean to say that an object is opaque? A. It reflects all visible light.
B. It absorbs all visible light.
C. Light will not transmit through it.
O D. Light will transmit through it.

In a particular chemical reaction, the energy of the reactants is 30 kj and the energy of the products is 5 kj. 
 the maximum energy of the system is 40 kj. sketch a potential energy diagram for this reaction. make sure to label the energy of the reactants, the energy of the products, the activation energy, and the enthalpy change for the reaction.