Gas Laws and IMFs Bellwork

Which substance in the table below has the strongest intermolecular forces?

• HF

• HCl

• HBr

• HI

Which statement explains why Br₂ is a liquid at STP and I₂ is a solid at STP?

• Molecules of Br₂ are polar, and molecules of I₂ are nonpolar.

• Molecules of I₂ are polar, and molecules of Br₂ are nonpolar.

• Molecules of Br₂ have stronger intermolecular forces than molecules of I₂.

• Molecules of I₂ have stronger intermolecular forces than molecules of Br₂.

If a substance has a high vapor pressure, this indicates that the substance has ____________ IMFs.

• Weak

• Moderate

• Strong

Which of the following does NOT experience hydrogen bonding?

• HF

• HI

• NH₃

• H₂O

Is this molecule polar or non-polar?

• Polar

• Non-polar

Polar, nonpolar, or ionic?

• Nonpolar
• Polar
• Ionic
• Pizza

A sample of a gas (5.0 mol) at 1.0 atm is expanded at constant temperature from 10.0 L to 15.0 L. The final pressure is ___ atm.

• 1.5 atm

• 15 atm

• 0.67 atm

• 3.3 atm

• 7.5 atm

The volume of a sample of gas (2.49 g) is 752 mL at 1.98 atm and 62ºC. What is the gas?

• NO₂

• SO₃

• SO₂

• Ne

• NH₃

Use the following equation (balance it): NaH + H₂O --> NaOH + H₂

A sample of NaH weighing ___ g will produce 982 mL of hydrogen gas at 28ºC and 765 torr, when the hydrogen is collected over water. The vapor pressure of water at this temperature is 28 torr.

• 0.960 g

• 925 g

• 0.0388 g

• 2.93 g

• 0.926 g

A flask contains 0.25 mole of SO₂(g), 0.50 mole of CH₄(g), and 0.50 mole of O₂(g). The total pressure of the gases in the flask is 800 mm Hg. What is the partial pressure of the SO₂(g) in the flask?

• 600 mm Hg

• 250 mm Hg

• 200 mm Hg

• 160 mm Hg