Chem 111 Exam 2 UPDATED ACTUAL QUESTIONS AND CORRECT ANSWERS
Draw the Lewis structure for CO32- including any The CO32- ion contains two C-O single bonds and one C=O double bonds
valid resonance structures. Which of the following
statements is TRUE?
, Draw the Lewis structure for NO2- including any The nitrite ion contains two N-O bonds that are equivalent to
valid resonance structures. Which of the following 1 1/2 bonds.
statements is TRUE?
Give the number of valence electrons for XeI2. 22
Give the number of valence electrons for SF4 34
Using Lewis structures and formal charge, which of OCN⁻
the following ions is most stable?
OCN⁻ ONC⁻ NOC⁻
Draw the best Lewis structure for the free radical, +1
NO2. What is the formal charge on the N?
Draw the best Lewis structure for Cl3-. What is the -1
formal charge on the central Cl atom?
How many of the following elements can form 3
compounds with an expanded octet?
Pb Kr Si B
How many of the following elements can form 3
compounds with an expanded octet?
I O Cl Xe
Give the approximate bond angle for a molecule with 109.5°
a tetrahedral shape.
Give the approximate bond angle for a molecule with 120°
a trigonal planar shape.
Determine the electron geometry (eg) and molecular eg=trigonal planar, mg=trigonal planar
geometry (mg) of CO32⁻.
Determine the electron geometry (eg) and molecular eg=tetrahedral, mg=tetrahedral
geometry (mg) of SiF4.
Determine the electron geometry (eg) and molecular eg=octahedral, mg=square planar
geometry (mg) of XeF4.
Determine the electron geometry (eg) and molecular eg=trigonal bipyramidal, mg=linear
geometry (mg) of XeF2.
Which electrostatic forces hold atoms together in a electron-nucleus forces
molecule?
What is the geometry around the central atom in the bent
following molecular model of NH2-?
Draw the Lewis structure for CO32- including any The CO32- ion contains two C-O single bonds and one C=O double bonds
valid resonance structures. Which of the following
statements is TRUE?
, Draw the Lewis structure for NO2- including any The nitrite ion contains two N-O bonds that are equivalent to
valid resonance structures. Which of the following 1 1/2 bonds.
statements is TRUE?
Give the number of valence electrons for XeI2. 22
Give the number of valence electrons for SF4 34
Using Lewis structures and formal charge, which of OCN⁻
the following ions is most stable?
OCN⁻ ONC⁻ NOC⁻
Draw the best Lewis structure for the free radical, +1
NO2. What is the formal charge on the N?
Draw the best Lewis structure for Cl3-. What is the -1
formal charge on the central Cl atom?
How many of the following elements can form 3
compounds with an expanded octet?
Pb Kr Si B
How many of the following elements can form 3
compounds with an expanded octet?
I O Cl Xe
Give the approximate bond angle for a molecule with 109.5°
a tetrahedral shape.
Give the approximate bond angle for a molecule with 120°
a trigonal planar shape.
Determine the electron geometry (eg) and molecular eg=trigonal planar, mg=trigonal planar
geometry (mg) of CO32⁻.
Determine the electron geometry (eg) and molecular eg=tetrahedral, mg=tetrahedral
geometry (mg) of SiF4.
Determine the electron geometry (eg) and molecular eg=octahedral, mg=square planar
geometry (mg) of XeF4.
Determine the electron geometry (eg) and molecular eg=trigonal bipyramidal, mg=linear
geometry (mg) of XeF2.
Which electrostatic forces hold atoms together in a electron-nucleus forces
molecule?
What is the geometry around the central atom in the bent
following molecular model of NH2-?
