CEM 141 MSU EXAM 3 PRACTICE SET 2026
MOLE CONCEPTS AND EQUILIBRIUM
QUESTIONS HIGH YIELD A+
◉ valence bond theory
Answer: atomic orbitals overlap to form bonds. bonds are
represented as sticks. bonds are localized between atoms
◉ why are hybrid orbitals a thing?
Answer: when there's e-s in a filled s orbital and half filled p orbitals.
now that ain't good bc the p orbitals are half filled! so they smish
smash together until they are an sp orbital
◉ why are diamonds hard?
Answer: they have a 3D network of strong bonds
◉ why don't diamonds conduct electricity?
Answer: their e-s are localized, which means there are no VE
(charged particles) that're free to move bc they're stuck in their
bonds
◉ why are diamonds translucent?
, Answer: there's a large band gap so e-s can't go to a higher energy
level
◉ on the PE curve, what does the PE minimum tell us?
Answer: this is the annoying graph! the PE min tells us the bond
energy, which is how deep the well is. it tells us the bond length (the
distance btwn the nuclei)
◉ how many bonds does H form?
Answer: 1
◉ how many bonds does C form?
Answer: 4
◉ how many bonds does O form
Answer: 2
◉ perspective formula - what's it look like
Answer: it's the 3d model of the Lewis Structure
◉ how to make a lewis structure
Answer: 1. calculate total VE
MOLE CONCEPTS AND EQUILIBRIUM
QUESTIONS HIGH YIELD A+
◉ valence bond theory
Answer: atomic orbitals overlap to form bonds. bonds are
represented as sticks. bonds are localized between atoms
◉ why are hybrid orbitals a thing?
Answer: when there's e-s in a filled s orbital and half filled p orbitals.
now that ain't good bc the p orbitals are half filled! so they smish
smash together until they are an sp orbital
◉ why are diamonds hard?
Answer: they have a 3D network of strong bonds
◉ why don't diamonds conduct electricity?
Answer: their e-s are localized, which means there are no VE
(charged particles) that're free to move bc they're stuck in their
bonds
◉ why are diamonds translucent?
, Answer: there's a large band gap so e-s can't go to a higher energy
level
◉ on the PE curve, what does the PE minimum tell us?
Answer: this is the annoying graph! the PE min tells us the bond
energy, which is how deep the well is. it tells us the bond length (the
distance btwn the nuclei)
◉ how many bonds does H form?
Answer: 1
◉ how many bonds does C form?
Answer: 4
◉ how many bonds does O form
Answer: 2
◉ perspective formula - what's it look like
Answer: it's the 3d model of the Lewis Structure
◉ how to make a lewis structure
Answer: 1. calculate total VE
