Exam 3 Practice

Solids, Liquids, Gas/Forces

100

In a ____________________, particles cannot move respect to one another, giving this state of matter a definite volume and definite shape

solid

200

In a ____________________, particles are far apart from one another, giving this state of matter an indefinite volume and indefinite shape

gas

300

To transition from gas to liquid, you can _________________ pressure and __________________ temperature

increase, decrease

400

356. The strongest intermolecular force between two CF4 molecules is ____________________ 

dispersion forces

500

____________________ only occur in mixtures of an ionic compound dissolved in a polar solvent

Ion-dipole forces

Boiling/Melting Point

100

A ___________________ (polar / nonpolar) solvent should be used to dissolve C₅H₁₂

Nonpolar

200

 A ___________________ (polar / nonpolar) solvent should be used to dissolve CH₃OH

Polar

300

C₂H₆ has a ____________________ melting point than C₄H₁₀

Lower

400

CH₃CHO has a ________________ boiling point than CH₃CH₂CH₃: they have similar molar masses, but the strongest intermolecular force between two CH₃CHO molecules is __________________________ and the strongest intermolecular force between two CH₃CH₂CH₃ molecules is __________________________

higher, dipole-dipole forces, dispersion forces

500

CH₃CH₃ has a ________________ boiling point than CH₃OH: they have similar molar masses, but the strongest intermolecular force between two CH₃CH₃ molecules is __________________________ and the strongest intermolecular force between two CH₃OH molecules is __________________________

lower, dispersion forces, hydrogen bonding

Hybridization

100

A single bond has _______ pi component(s) and _____ sigma component(s)

0, 1

200

The sigma component of a double bond is ________________(weaker / stronger) than the pi component

Stronger

300

The hybridization in XeF₄ is ____________

sp³d²

400

The hybridization in PF₅ is __________

sp³d

500

The hybridization in F₂CO is __________

sp²

Bond Schemes/Bond Order

100

In CH₃CN, the bonding scheme for the bond between C and C is __________________

σ: C(sp³) – C(sp)

200

In molecular orbital theory, bonding molecular orbitals are ___________________ in energy than their antibonding molecular orbitals

lower

300

In CH₃CHO, the bonding scheme for the bond between C and O is _________________

σ: C(sp²) – O(p) 

 π: C(p) – O(p)  

400

The bond length of F₂ should be ________________ than the bond length of F₂^–

shorter

500

C₂²⁺ should be _____________________________ (paramagnetic / diamagnetic)

paramagnetic

Balancing Equations

300

What is the sum of the coefficients, including implied 1’s, for the balanced chemical equation:     ___C₁₂H₂₂O₄(s) + ___O₂(g) -> ___CO₂(g) + ___H₂O(g)

79

400

What is the sum of the coefficients, including implied 1’s, for the balanced chemical equation:     ___C₁₄H₂₄O₅(s) + ___O₂(g) -> ___CO₂(g) + ___H₂O(g)

89

500

What is the sum of the coefficients, including implied 1’s, for the balanced chemical equation:     ___C₁₅H₃₀O₆(s) + ___O₂(g) -> ___CO₂(g) + ___H₂O(g)

101