For a non-linear molecule with 5 atoms, how many vibrational modes does it have? 9. 8 7

12. What is the carbon-carbon bond order (in blue) in the excited state of 2-butene. H₂C H a. 0 b. 1 c. 1.5 d. 2 e. 0.5 H CH₂

Complete the table below, which lists information about some diatomic molecules or molecular ions. In particular: • Decide whether each molecule is stable or not. • Decide whether each molecule would be diamagnetic or paramagnetic. • Calculate each molecule's bond order. ? 000 molecule stable? 2- ○ yes Be2 H₂ no yes no yes no diamagnetic or paramagnetic? diamagnetic paramagnetic O diamagnetic paramagnetic ○ diamagnetic O paramagnetic bond order ☐ Π ㅁㅁ ✗ Ar

Which of the following non-linear molecules should be modeled as an asymmetric rigid top for its rotational energy levels? (The VSEPR configuration about the central atom is indicated in parentheses.) OBCI 3 (trigonal planar) O CHCl3 (tetrahedral) OCH3CI (tetrahedral) O CH₂Cl₂ (tetrahedral) OCCl4 (tetrahedral)

Like many of the molecules we have studied in this class, propene (structure shown below) can be thought of as a particle in a box. There are three t-electrons. Since I can put two electrons in each energy level, the highest-energy electron is in the n = 2 state (the HOMO). What does the wave for this electron look like? n = 3 lowest unoccupie molecular orbital (LUMO) n = 2 highest occupiedi molecular orbital (НОМО) . n = 1 Select one: Оа. O b. О с. O d. None of these shapes are right.

Draw a simple picture of the average distribution of electrons in a molecule of oxygen, O2

Complete the table below, which lists information about some diatomic molecules or molecular ions. In particular: • Decide whether each molecule is stable or not. • Decide whether each molecule would be diamagnetic or paramagnetic. • Calculate each molecule's bond order. diamagnetic or paramagnetic? molecule stable? bond order 믐 O yes diamagnetic H, ? no paramagnetic yes diamagnetic He, no paramagnetic yes O diamagnetic no paramagnetic

3 2 4 5 Consider the following second-period heteronuclear diatomic molecule. Combining the valence orbitals (2px, 2py, 2pz, and 2s) of each of the two atoms creates eight new orbitals (one 02s*, one 02s, one 02p, one 02p, two л₂p, and two л₂p) that span the entire molecule and explain it's electronic properties. Those eight new orbitals exist at six energy levels. Rank the molecular orbitals of a F2 molecule from lowest (1) to highest (6) energy. Fatom 6- highest 1- lowest F2 molecule [Choose ] [Choose ] [Choose ] [Choose ] [Choose ] [Choose ] F atom

E = h v E = hc / wavelenegth wavelength = c / v c = 3.00 x 108 m /s h = 6.626 x 10-34 J. s 1 nm = 1 x 10-9 m Avogadro's number: 6.022 x 1023 total electron group group geometry number of surrounded atoms  number of lone pair of electrons molecular shape  2 linear  2 0 linear   3 trigonal planar  3     2 0     1 trigonal planar      bent or angular  4     tetrahedral  4       3     2     0       1     2       tetrahedral        trigonal pyramidal    bent or angular              Calculate mass% of O in NO2 . N= 14.00 g/mole,    O =16.00 g/mole  Group of answer choices A.) 78.22% B.) 9.082% C.) 69.57% D.) 95.32%

E = h v E = hc / wavelenegth wavelength = c / v c = 3.00 x 108 m /s h = 6.626 x 10-34 J. s 1 nm = 1 x 10-9 m Avogadro's number: 6.022 x 1023 total electron group group geometry number of surrounded atoms  number of lone pair of electrons molecular shape  2 linear  2 0 linear   3 trigonal planar  3     2 0     1 trigonal planar      bent or angular  4     tetrahedral  4       3     2     0       1     2       tetrahedral        trigonal pyramidal    bent or angular              2. Determine maximum number of electrons in p atomic orbitals.  Group of answer choices A.) 10 electrons B.) 2 electrons C.) 8 electrons D.) 6 electrons