Three flasks, each containing a gas sample, are set up as shown below. Assuming no temperature change, determine the final pressure inside the system after all stopcocks are opened. Assume that the connecting tube has negligble volume. A = Ne(g) V= 4.01 L P=0.705 atm B = N2(g) V-2.30 L P = 1.07 atm C = CH4(g) V= 5.99 L P= 3.04 atm Final pressure = atm
The molecules of a pure gas are distributed evenly throughout the container.
Gases are much less dense than liquids or solids
Molecules in a gas mixture can form layers according to their densities
Gases can be compressed, even to the point of liquefaction
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Question 21 pts
Which example is the greatest pressure?
1.00 atm
101 kPa
760 mm Hg (= 760 torr)
All of the above pressures are equal.
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Question 31 pts
Which example is the greatest pressure?
850 mm Hg (= 850 torr)
1.5 atm
All of the above pressures are equal.
96 kPa
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Question 41 pts
Assuming all other variables are held constant, a graph of which of the following will NOT yield a straight line?
P vs. V
V vs. T
P vs. T
V vs. n
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Question 51 pts
A sealed vessel contains 0.250molof oxygen gas. Whichof the following will result in a decrease in the pressure of the oxygen gas?
increasing the number of moles of oxygen
increasing the temperature of the vessel
increasing the volume of the vessel
adding some helium to the vessel
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Question 61 pts
According to Charlesâslaw, which change will cause the pressure of a gas to double? Pressure and amount of gas are constant.
The temperature decreases from 650 K to 325 K.
The temperature of the sample decreases from�88 °C to 44 °C.
The temperature of the sample increases from�22 °C to 44 °C.
The temperature of the sample increases from�250 K to 500 K.
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Question 71 pts
Which set of units forP,V, andTcan be used for combined gas law calculations?
torr, L, and Kelvins
tm, g/L, and Kelvins
atm, mL, and degrees Celsius
inches of mercury, g/mL, and degrees Celsius
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Question 81 pts
The vapor pressure of a gas is
the atmospheric pressure at which the boiling point is determined.
the pressure at a Kelvin temperature exactly two times the boiling point.
impossible to determine experimentally without knowing the temperature and volume.
the pressure above a gas sample when evaporation and condensation are balanced.
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Question 91 pts
In a chemistry experiment where CO2is collected over water, the atmospheric pressure is 755 mm. The partial pressure of water at the temperature in the lab is 24.2 mm. What is the pressure of the CO2?
779 mm
731 mm
More information is needed to answer this question
755 mm
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Question 101 pts
Which statement is NOT true according to the kinetic molecular theory of gases?
Molecules undergo elastic collisions
Molecules move in straight-line paths.
Molecules of different gases have different�kinetic energies at the same temperature
Molecules occupy a negligible volume.
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Question 111 pts
Which statement is NOT true according to the ideal gas law?
At constant P & T, V must increase when n increases.
At constant V & T, P must decrease when n decreases.
At constant V & n, P must increase when T increases.
At constant P & n, V must decrease when T increases