The pressure of a gas is measured in a closed manometer

Question

QUESTION 1

1. The pressure of a gas is measured in a closed manometer.  The gas supports mercury at a height of 365 mm.  What is the pressure in kPa?

QUESTION 2

1. With the temperature held constant, if pressure on a gas is increased, the volume will ______________.  If the pressure of a gas is held constant and the temperature is increased, the volume of the gas will ____________.

   increase, increase

   decrease, decrease

   increase, decrease

   decrease, increase

 

QUESTION 3

1. What is the density in g/L of a 12.8 g sample of nitrgoen gas at 15.8 °C and 2.25 atm?

 

QUESTION 4

1. Order the gases from most dense (1.) to least dense (5.) at 25°C and 1 atm.

            -         1.         2.         3.         4.         5.         H2
            -         1.         2.         3.         4.         5.         

   Kr

   
            -         1.         2.         3.         4.         5.         F2
            -         1.         2.         3.         4.         5.         N2
            -         1.         2.         3.         4.         5.         

   Ne

QUESTION 5

1. If 2.97 moles of nitrogen reacts with 4.96 moles of hydrogen, what is the maximum volume of ammonia (in L) that can be produced at a pressure of 1.01 atm and 327 K.

   N₂(g) + 3 H₂(g) → 2 NH₃(g)

 

QUESTION 6

1. 13.2 g of butane (58.12 g/mol)  undergoes combustion according to the following equation.  What pressure of carbon dioxide in atm is produced at 313 K in a 1.32 L flask.

   2 C₄H₁₀ (g) + 13 O₂ (g) → 8 CO₂ (g) + 10 H₂O (g)

 

QUESTION 7

1. If 2.01 moles of nitrogen reacts with 4.96 moles of hydrogen, what is the maximum volume of ammonia (in L) that can be produced at a pressure of 1.03 atm and 347 K.

   N₂(g) + 3 H₂(g) → 2 NH₃(g)

 

QUESTION 8

1. 10.5 g of butane (58.12 g/mol)  undergoes combustion according to the following equation.  What pressure of carbon dioxide in atm is produced at 317 K in a 1.35 L flask.

   2 C₄H₁₀ (g) + 13 O₂ (g) → 8 CO₂ (g) + 10 H₂O (g)

1 points   

QUESTION 9

1. Which of the following will influence the speed at which a gas leaks out of a balloon?

   Temperature of the gas.

   Size of the individual gas molecules

   Mass of the indivisual gas molecules

 

QUESTION 10

1. An argon atom has a mass 10 times greater than a Helium atom. How many times faster is the helium atom's velocity?

 

QUESTION 11

1. What is the density (in g/L) of a sample of nitrogen gas that occupies a volume of 5.69L at a pressure of 3.93 atm and a temperature of 31.2^oC? 

 

QUESTION 12

1. A balloon contains 3.26L of helium at a temperature of 25.6^oC and a pressure of 1.03 atm.  What is the mass of helium in the balloon?

 

QUESTION 13

1. When measuring the volume and pressure of a real gas, are they expected to be larger or smaller than the values based on the ideal gas equation?  Choose all correct answers.

   A.	Pressure of the real gas will be smaller than predicted.
   B.	Pressure of the real gas will be greater than predicted.
   C.	Volume of the real gas will be greater than predicted.
   D.	Volume of the real gas will be smaller than predicted.

 

QUESTION 14

1. Under which of the following conditions is a gas expected to behave most like an ideal gas? Choose all that apply.

   A.	Higher Pressures
   B.	Lower Pressures
   C.	Higher Temperatures
   D.	Lower Temperatures

 

QUESTION 15

1. At a certain temperature the vapor pressure of water is 17  torr.  The pressure of the gas in a soda bottle (carbonated water) is measured to be 807 torr.  What is the pressure (in torr) of the carbon dioxide in the soda bottle?

QUESTION 16

1. A sample of gas contains 4.17 moles of oxygen, 1.93 moles of nitrogen, and 1.71 moles of carbon dioxide.  If the total pressure is 4.75 atm, what is the partial pressure of the oxygen in atm?