The products of a certain chemical reaction contain 30 kJ of potential energy, and the reactants contain 4 kJ. How much energy is released or absorbed by the reaction? O A. 26 kJ is absorbed. B. 26 kJ is released. O C.34 kJ is absorbed. O D. 34 kJ is released.

When can a theory be modified if a new type of technology allows for new observations that raise new questions? a-immediately, while the questions about the theory are being asked b-after new hypotheses related to the theory are tested in experiments c-only after the new observations disprove all parts of the theory d-while scientists begin to think about how the theory could improve