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- Multiple ChoicePlease save your changes before editing any questions.
At the same temperature and pressure, 1.0 liter
of CO(g) and 1.0 liter of CO2(g) have
different volumes and a different number
of molecules
equal masses and the same number of
molecules
equal volumes and the same number of
molecules
different masses and a different number of
molecules
- Multiple ChoicePlease save your changes before editing any questions.
A 220.0-mL sample of helium gas is in a
cylinder with a movable piston at 105 kPa and
275 K. The piston is pushed in until the sample
has a volume of 95.0 mL. The new temperature
of the gas is 310. K. What is the new pressure
of the sample?
51.1 kPa
216 kPa
243 kPa
274 kPa
- Multiple ChoicePlease save your changes before editing any questions.
A sample of gas confined in a cylinder with a
movable piston is kept at constant pressure. The
volume of the gas doubles when the
temperature of the gas is changed from
200. K to 400. K
200.°C to 400.°C
400. K to 200. K
400.°C to 200.°C
- Multiple ChoicePlease save your changes before editing any questions.
A rigid cylinder contains a sample of gas at
STP. What is the pressure of this gas after the
sample is heated to 410 K?
.5 atm
.7 atm
1.0 atm
1.5 atm
- Multiple ChoicePlease save your changes before editing any questions.
A flask contains a mixture of N2(g) and O2(g)
at STP. If the partial pressure exerted by the N2
(g) is 40.0 kPa, the partial pressure of the O2(g)
is
61.3 kPa
21.3 kPa
37.3 kPa
720 kPa
- Multiple ChoicePlease save your changes before editing any questions.
A mixture of gases has a total pressure of 200
kPa. The mixture contains 8 moles of nitrogen
gas and 2 moles of oxygen gas. What pressure
is exerted by the oxygen gas molecules?
400 kPa
20 kPa
200 kPa
40 kPa
- Multiple ChoicePlease save your changes before editing any questions.
A 300.-milliliter container that is filled with
100. milliliters of oxygen and 200. milliliters of
hydrogen has a total pressure of 75 kPa. What
is the partial pressure of the oxygen?
20 kPa
50 kPa
25 kPa
10 kPa
- Multiple ChoicePlease save your changes before editing any questions.
A sealed flask contains a mixture of 1.0 mole of
N2(g) and 2.0 moles of O2(g) at 25oC. If the
total pressure of this gas mixture is 6.0
atmospheres, what is the partial pressure of the
N2(g)?
6.0 atm
2.0 atm
3.0 atm
9.0 atm
- Multiple ChoicePlease save your changes before editing any questions.
Which liquid has the lowest vapor pressure at
65°C?
ethanoic acid
ethanol
propanone
water
- Multiple ChoicePlease save your changes before editing any questions.
In a closed system, as the temperature of a
liquid increases, the vapor pressure of the liquid
decreases
increases
remain the same
- Multiple ChoicePlease save your changes before editing any questions.
The vapor pressure of ethanol at its normal
boiling point is
80 kPa
273 kPa
100 kPa
101.3 kPa
- Multiple ChoicePlease save your changes before editing any questions.
When the temperature of a sample of water is
changed from 45 C to 70. C, the change in its
vapor pressure is
1.0 kPa
20 kPa
25 kPa
101.3 kPa
- Multiple ChoicePlease save your changes before editing any questions.
Which statement describes the particles of an
ideal gas based on the kinetic molecular theory?
The gas particles have collisions involving
a transfer of energy.
The gas particles are relatively far apart
The gas particles are in constant, nonlinear
motion.
The gas particles have attractive forces
between them.
- Multiple ChoicePlease save your changes before editing any questions.
A sample of a gas is contained in a closed rigid
cylinder. According to kinetic molecular
theory, what occurs when the gas inside the
cylinder is heated?
The number of gas molecules increases.
The average velocity of the gas
molecules increases.
The number of collisions between gas
molecules per unit time decreases.
The volume of the gas decreases.
- Multiple ChoicePlease save your changes before editing any questions.
Under which conditions of temperature and
pressure would helium behave most like an
ideal gas?
50 K and 20 kPa
50 K and 600 kPa
750 K and 20 kPa
750 K and 600 kPa
- Multiple ChoicePlease save your changes before editing any questions.
A real gas behaves least like an ideal gas under
the conditions of
high temperature and low pressure
low temperature and low pressure
low temperature and high pressure
high temperature and high pressure
- Multiple ChoicePlease save your changes before editing any questions.
Which of the following gases behaves most like
an ideal gas?
NH3(g)
O2(g)
CO2(g)
H2(g)