Quiz - \[02\] Exam 2
Question 1 5 / 5 points
How many moles of H2 would be contained in 4.0 L of the gas at 202.6 kPa and 127°C?
Question options:
89.6 mol
→0.24 mol
6.38 mol
0.77 mol
Question 2 5 / 5 points
The graph of several pressure-volume readings on a contained gas at constant temperature would be
Question options:
a vertical line.
a horizontal line.
a straight line.
→a curved line.
Question 3 5 / 5 points
Among the gases listed, which would have the fastest rate of effusion?
Question options:
NH3
NO2
→CH4
SO2
Question 4 0 / 5 points
Death Valley in California is 86 m below sea level. Will the partial pressure of oxygen in Death Valley be the same, lower or higher than the partial pressure of oxygen at sea level?
Question options:
×higher (wrong)
the same
impossible to tell without additional information
lower
Question 5 0 / 5 points
A temperature of –25°C is equivalent to:
Question options:
25 K.
248 K.
→298 K.
–25 K.
Question 6 5 / 5 points
The volume (in L) that would be occupied by 5.00 mol of O2 at STP is
Question options:
0.411 L.
22.4 L.
41.6 L.
→112 L.
Question 7 5 / 5 points
If the Kelvin temperature of a gas is tripled and the volume if doubled, the new pressure will be ___.
Question options:
1/6 the original pressure
5 times the original pressure
2/3 the original pressure
→3/2 the original pressure
Question 8 5 / 5 points
The graph of a relationship between variables that is directly proportional is a straight line.
Question options:
→True
False
Question 9 5 / 5 points
Which of the following best describes the relationship of pressure and volume indicated by Boyle's Law?
Question options:
direct
→inverse
positively related
cannot be described without numbers to solve with
Question 10 5 / 5 points
If the temperature of a gas in a closed container increases
Question options:
→the pressure of the gas increases.
the pressure of the gas decreases.
the molecules collide with the walls of the container less frequently.
the average kinetic energy of the molecules decreases.
Question 11 5 / 5 points
Which of the following will increase the pressure of a gas in a closed container?
I. part of the gas is removed
II. the container size is decreased
III. temperature is increased
Question options:
I and II only
→II and III only
I and III only
I, II, and II
Question 12 5 / 5 points
Absolute zero is
Question options:
–273.15°C.
the lowest possible temperature.
the temperature at which the average kinetic energy of particles would theoretically be zero.
→all of the above
Question 13 5 / 5 points
If a sample of oxygen occupies a volume of 2.15 L at a pressure of 58.0 kPa and a temperature of 25°C, what volume would this sample occupy at 101.3 kPa and 0°C?
Question options:
3.44 L
→1.13 L
1.35 L
4.10 L
Question 14 5 / 5 points
Doubling the number of particles of gas in an inflated tire will double the pressure of the gas in the tire.
Question options:
→True
False
Question 15 5 / 5 points
At constant pressure, the volume of a fixed mass of gas and its Kelvin temperature are said to be
Question options:
inversely related.
→directly related.
constant.
unrelated.
Question 16 0 / 5 points
At constant volume, if the Kelvin temperature of a gas is doubled, the pressure of the gas is halved.
Question options:
True
→False
Question 17 5 / 5 points
A sample of H2 is collected over water such that the combined hydrogen–water vapor sample is held at a pressure of 1 standard atmosphere. What is the partial pressure of the H2 if that of the water vapor is 2.5 kPa?
Question options:
→98.8 kPa
101.3 kPa
103.8 kPa
2.5 kPa
Question 18 5 / 5 points
What is the mass, in grams, of 0.125 L of CO2 at STP?
Question options:
→0.246 g
2.80 g
4.11 g
181 g
Question 19 5 / 5 points
Which of the following would double the pressure on a contained gas at constant temperature?
Question options:
doubling the volume of the container
halving the number of particles in the container
→doubling the number of particles in the container
none of the above
Question 20 5 / 5 points
The temperature of 6.24 L of a gas is increased from 25.0°C to 55.0°C at constant pressure. The new volume of the gas is
Question options:
5.67 L.
→6.87 L.
13.7 L.
2.84 L.