Exam 3 practice

Which of the following gives the correct molecular geometry. Select all that apply

• NF3 is trigonal pyramidal

• PF5 is trigonal bipyramidal

• ClF3 is t-shaped

• IF5 is sqaure pyramidal

• XeF2 is bent

Which of the following is/are polar?

• NF3

• PF5

• ClF3

• IF5

• XeF2

Which of the following is/are true? Select all that apply

• In general, in the solid state of matter, the strength of intermolecular forces are strong relative to thermal energy, which helps explain definite volume and shape of a solid.

• Solids can be classified as crystalline or amorphous; crystalline solids have no long-range order.

• In general we can change from the gas to the liquid state of matter by increasing pressure or cooling.

Draw the best Lewis structure for CH3COOCH3. Include all lone pairs of electrons and nonbonding electrons. What is the molecular geometry for the central C.

CH3COOCH

Draw the best Lewis structure for CH3COOCH3. Include all lone pairs of electrons and nonbonding electrons. What is the molecular geometry for the interior O.
CH3COOCH3

What intermoleculare forces will be present between two CH3COOCH3 molecules. Select all that apply.

• Dispersion

• Dipole-Dipole

• Hydrogen bonding

• Ion-dipole

Xenon TetraFluoride is polar

• true

• false

What hybridization does NF3 have

What hybridization does XeF2

Which of the following is/are true? Select all that apply

• The boiling of ethanol C2H5OH is a physical change.

• Crushing a rock to powder is a chemical change

• The viscosity of motor oil is a physical property

• The flammability of octane is a chemical property.