Chemistry B Gas Laws

Which gas will have the greatest speed, assuming all gases are in the same container at the same temperature?

• CO2

• H2O

• CH4

• CO

Decreasing the pressure on a liquid will likely allow it to become which phase of matter? 

• Solid

• Liquid

• Gas

• Plasma

Tags

NGSS.MS-PS1-4

Increasing the pressure on a liquid will likely allow it to become which phase of matter? 

• Solid

• Liquid

• Gas

• Plasma

If the atmospheric pressure suddenly becomes less than the pressure inside a small balloon, which of the following would you expect to occur?

• The balloon will increase in size.

• The balloon will decrease in size.

• The balloon will remain unchanged.

• The balloon will twist itself into a balloon animal.

In the open-ended manometer on the left, if the atmospheric pressure (p atm) is 750 mm of Hg, what is the pressure of the gas in mm of Hg? The value of h2 is 350 mm Hg.

• 400 mm Hg

• 1100 mm Hg

• 750 mm Hg

• 350 mm Hg

Answer explanation

Since the atmosphere pushes harder than the gas, the pressure of the atmosphere is greater than the gas. That means we need to subtract to solve for the pressure of the gas in the manometer.

In the open ended manometer shown in the picture, if the pressure of the atmosphere is 760 mm Hg, what is the pressure of the gas? (Hint: 1 cm = 10 mm)

• 800 mm Hg

• 760 mm Hg

• 720 mm Hg

• 764 mm Hg

Answer explanation

The gas pushes harder than the atmosphere, so it has more pressure. Since the difference is 4 cm, this is equal to 40 mm. We need to add the values together to solve for the greater pressure of the gas.

Which phase of matter has the strongest forces of attraction between particles?

• solid

• liquid

• gas

• plasma

Tags

NGSS.HS-PS1-3

Which phase of matter is a super heated gas that allows the electrons to no longer be closely associated with the nucleus, creating a 'soup' of charged particles?

• solid

• liquid

• gas

• plasma

Tags

NGSS.HS-PS3-5

Which phase of matter has defined volume but not a defined shape, with moderate levels of intermolecular forces attracting particles together?

• solid

• liquid

• gas

• plasma

Tags

NGSS.MS-PS3-4

Which phase of matter has very few intermolecular forces of attraction between particles, with no defined shape or volume?

• solid

• liquid

• gas

• plasma

Tags

NGSS.MS-PS3-4