Chem201X In-Class Worksheet #12: Hybrid Orbitals and Gas Laws
1. Dopamine is a neurotransmitter that helps control the brain's reward and pleasure centers. Its
Lewis structure is shown below with some of the atoms labeled with numbers. Referring to
this structure complete the table below.
Geometry
Angle
Hybridization
O1
C2
C3
N
2. What is the hybridization on the central atom in TeF4? Draw orbital diagrams for Te alone
and Te in TeF4.
3. Draw the Lewis structure for H2CNH.
a. What is the hybridization on the C and on the N?
b. In what orbital are the lone pair of electrons on the N located?
c. Which orbitals from each atom overlap to form the σ bond between C and N?
d. Which orbitals from each atom overlap to form the π bond between C and N?
Chem201X In-Class Worksheet #12: Hybrid Orbitals and Gas Laws
4. Aluminum reacts with oxygen gas according to the reaction, 4 Al(s) + 3 O2(g) → 2 Al2O3(s).
PV = nRT
R = 0.08206 L·atm/mol·K
a. How many moles of oxygen are required to react with aluminum to produce 15.2 g of
aluminum oxide? (keep all digits of your answer in your calculator for the next part)
[0.223617 mol O2]
b. What volume of oxygen gas at 741 mmHg and 19.5 °C will produce 15.2 g of aluminum
oxide? [5.51 L]
c. If 3.70 g of Al is placed in a 2.15 L container of oxygen at STP (0ºC, 1 atm), assuming a
complete reaction, which compound will be the limiting reactant? How many grams of
aluminum oxide will be produced? [O2 is LR; 6.52 g Al2O3]