If a catalyst is used in a reaction,
a. the energy of activation increases.
b. different reaction products are obtained.
c. the reaction rate increases.
d. the reaction rate does not change

The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms

Heat energy, carbon dioxide, and water are released through which process? a. photosynthesis b. depolymerization c. digestion d. cellular respiration

How can a ringing telephone can be heard through a closed door