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PS100 Questions from Chapter 20 Comprehension Matching The low energy orbital of the pair of molecular orbitals (MO's) formed when two atomic orbitals combine. The point in a chemical reaction in which the forward and reverse reaction rates are equal. The point in a reaction that separates reactants from products on a potential energy surface. The high energy orbital of the pair of MO's formed when two atomic orbitals combine. The energy that must be put into a system before a reaction can take place. True/False The probability waves (orbitals) that describe the possible locations for an electron in a molecule are exactly the same as those for an electron in an isolated atom. true false Electrons in a bonding molecular orbital are most likely to be found between the nuclei in a molecule. true false A reaction usually goes faster at higher temperatures.
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Unformatted text preview: true false • A catalyst is a chemical that is present at the beginning of a reaction but not at the end. true false • A very fast reaction has a very high activation energy. true false Analysis • Which of the following equations are balanced? 2C + 0 2 - 2CO H 2 + F 2 - HF Mg + F 2 - MgF 2 2H 2 O 2 - H 2 O + O 2 2 O 3 - 3 O 2 2Fe 3 O 4 - 3Fe 2 O 3 + O 2 2Al + 3 O 2- Al 2 O 3 • Atomic chlorine (Cl) is known to be a catalyst for some of the reactions that are responsible for the depletion of ozone (0 3 ) in the upper atmosphere (also known as the ozone hole). As a catalyst, Cl may be lowering the activation energy of some reaction involving ozone. be consumed in the reaction. for a transition state with 0 3 in which O 3 bonds get weakened. a and c. a, b, and c. Check Answers Choose a different chapter....
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