Astronomy-Astro Physics

A certain gas sample occupies 3.25 L at 742 torr. Find the volume of the gas sample if the pressure is changed to 795 torr. Temperature remains constant.

• 5.85 L

• 3.03 L

• 6.25 L

• 4.18 L

If 20. L of oxygen are cooled from 100 $\degree C$   to 0 $\degree C$ , what is the new volume?

• 15.45 L

• 8.85 L

• 6.25 L

• 14.6 L

The pressure of a container of He is 650 torr at 25 $\degree C$ . If the sealed container is cooled to 0 $\degree C$  , what will the pressure be?

• 595 torr

• 285 torr

• 655 torr

• 458 torr

What pressure will be exerted by 0.400 mol of gas in a 5.00 L container at 17.0  $\degree C?$  

• 1.90 atm

• 12.05 atm

• 3.75 atm

• 18.25 atm

The density of a gaseous organic compound is 3.38 g/L at 40 $\degree C$   and at 1.97 atm. What is its molar mass? 

• 12.88 g/mol

• 83.75 g/mol

• 44.1 g/mol

• 72.14 g/mol

Calculate the volume which 4.00 L of gas at 0 $\degree C$   will occupy at 100  $\degree C$   and the same pressure

• 8.72 L

• 5.47 L

• 12.01 L

• 11.07 L

A sample of gas occupies 2.00 L at 760 torr. Calculate the volume it will occupy at 1.25 atm and the same temperature.

• 1.6 L

• 55.72 L

• 4.55 L

• 88.12 L

A sealed steel tank contains carbon dioxide at 27 °C and is at a pressure of 11.0 atm. Determine the pressure of the gas inside the tank when the tank and its content are heated to 100 °C.

• 97.123 atm

• 13.7 atm

• 1.88 atm

• 22.026 atm

How many atmospheric pressure must 2.00 L gas measures at 1.00 atm and -20 °C is subjected to be compressed to 0.500 L when the temperature is 40 °C

• 15.45 K

• 4.95 K

• 12.55 K

• 2.54 K

A sample of nitrogen gas left open in a container of volume 2.3 L and at a temperature of 32 °C exerts a pressure of 4.7 atm. Calculate the number of moles of gas present.

• 0.55 mol

• 5.12 mol

• 0.43 mol

• 12.01 mol