Chem 202 Exam 2 with Questions and Answers
which substances exhibit only london (dispersion) forces? ANSWER Cl2 and He
if a solid line represents a covalent bond and a dotted line represents intermolecular attraction, which of the choices shows a hydrogen bond? ANSWER H3N⋅⋅⋅⋅⋅⋅H�...
Chem 202 Exam 2 with Questions and
Answers
which substances exhibit only london (dispersion) forces? ANSWER Cl2 and He
if a solid line represents a covalent bond and a dotted line represents intermolecular
attraction, which of the choices shows a hydrogen bond? ANSWER H3N⋅⋅⋅⋅⋅⋅H−O−H
Arrange the molecules from strongest london (dispersion) force to weakest ANSWER
1.CH3CH2CH2CH2CH2CH2CH3
2.CH3CH2CH2CH2CH3
3.CH3C(CH3)2CH3
Hydrogen bonding, dipole-dipole, and dispersion ANSWER H2O
Dipole-dipole and dispersion only ANSWER CH3Cl and CO
Dispersion only ANSWER H2
Arrange these compounds by their expected boiling point (highest and lowest). ANSWER 1.
CH3OH
2. CH3Cl
3. CH4
strong intermolecular forces ANSWER - high boiling point
, - high surface tension
- high viscosity
weak intermolecular forces ANSWER high vapor pressure
body centered cubic ANSWER - 8 corners
- 1 body atom
- 1/8 fraction of each corner atom inside the boundaries of the cube
- 2 total number of atoms
8 × (1/8) + 1 = 2 atoms.
ionic solids ANSWER Na2S
molecular solid ANSWER CCl4
metallic solid ANSWER K
covalent solid ANSWER C (diamond)
H2O is a polar molecule which exhibits ANSWER mainly hydrogen bonding
He is nonpolar and so it exhibits ANSWER primarily London forces
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