Gases

What are the values for STP?

• 0 K and 1 atm
• 0^oC and 1 atm
• 760 K and 1 atm
• 273^oC and 1 atm

Calculate the volume that a 0.323-mol sample of a gas will occupy at 265 K and a pressure of 0.900 atm.

• 7.18 L 
• 7.81 L
• 4.63 L
• 4.36 L

What is the pressure in a container that has 3 atm H_2, 2 atm of N₂ and 5 atm of F₂?

• 2 atm

• 3 atm

• 5 atm

• 10 atm

Find the density of neon gas at 0.725 atm and 25°C [M_m =20.18]

• 0.35

• 0.47

• 0.60

• 0.79

An important idea of the kinetic theory is that particles of matter 

• are in constant motion
• have different shapes
• have different colors
• are always fluids

Tags

NGSS.HS-PS3-2

How are pressure and temperature related?

• Directly

• Indirectly

• They aren't related

Gas pressure is caused by

• gas molecules colliding with surfaces
• gas molecules condensing to a liquid
• gas molecules hitting other gas molecule
• barometers

• Since all flask have same amount of gas, flask 1 has the least pressure
• Since all flask have same amount of gas, flask 2 has the least pressure
• Since all flask have same amount of gas, flask 3 has the least pressure
• Since all flask have same amount of gas, flask 4 has the least pressure

Use the following reaction (balance it): calcium sulfite reacts with excess hydrochloric acid to produce water vapor, sulfur dioxide gas and calcium chloride.

What volume (in mL) of sulfur dioxide can be produced by 3.82 g of calcium sulfite when the final pressure of SO₂ is 827 torr at 44ºC?

• 1.39 x 10^-4 mL

• 0.106 mL

• 1.00 x 10^-3 mL

• 761 mL

• 578 mL

Tags

NGSS.HS-PS1-5

The pressure in a 12.2 L vessel that contains 2.34 g of carbon dioxide, 1.73 g of sulfur dioxide and 3.33 g of argon; all at 42ºC is ____ mmHg.

• 116 mmHg

• 395 mmHg

• 134 mmHg

• 263 mmHg

• 0.347 mmHg