22 Questions
What is the total score of the CHEM 400 exam?
100
How many pages are there in the exam?
7
What is the time limit to complete the exam?
80 minutes
What should be circled in the answer sheet?
The answer choice
What should be used to check calculations?
A programmable calculator with cleared memory
What is the significance of page 7?
It has a periodic table and useful information
What is the correct ranking of the phase letters in terms of their physical states?
A = solid, B = gas, C = liquid, D = triple point
What is the correct order of bond angle for the given compounds?
CS2 > CF4 > SCl2
What is the correct valence bond diagram for HCN?
Hsp2-Csp-Nsp
What is the estimated ΔH°rxn for the reaction C2H2(g) + 2H2(g) → C2H6(g)?
-292 kJ/mol
At what temperature would water boil at the lowest point of Death Valley?
100.23 ℃
What is the correct ranking of the intermolecular forces (IMF) in decreasing relative strength?
hydrogen bonding > dipole-dipole > London dispersion > ionic
What is the bond order of NO- according to Molecular Orbital Theory?
1.5
What is the process represented by the equation K(s) → K(g)?
Vaporization
What is the unit of the gas constant R?
J/mol·K
What is the purpose of constructing a Born-Haber cycle?
To calculate the heat of formation of a compound
What is the physical meaning of the sign of the heat of formation (∆Hf°)?
It indicates the exothermicity of the reaction
What is the number of electron groups around the central atom in a molecule with sp3 hybridization?
4
Which of the following statements about vaporization is FALSE?
Molecules with hydrogen bonding are more volatile than compounds with dipole-dipole forces.
What is the electron geometry and molecular geometry of SO2?
Trigonal planar, bent
How much energy is required to vaporize 98.6 g of ethanol (C2H5OH) at its boiling point?
86.7 kJ
What is the bond angle in NH3?
104.5°
A closed-book exam for CHEM 400 course in Fall 2022, testing knowledge in various chemistry topics. This exam requires a scientific calculator and all work must be placed in the provided space.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
