Welcome to the Quiz!
This quiz contains 19 questions from a mix of 1 subtopics.
Calculate the number of moles of oxygen molecules there are in a volume of 500 cm3 at a temperature of 25.0°C and a pressure of 100 kPa.
Give your answer to 3 significant figures
R = 8.31 J K-1 mol-1
mol
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Calculate the volume, in dm3, occupied by 0.500 mol of hydrogen at a pressure of 120 kPa and a temperature of 22°C.
Give your answer to 3 significant figures.
R = 8.31 J K-1 mol-1
dm3
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A flask of volume 4.00 dm3 contained 3.5 g of carbon dioxide.
Calculate the pressure, in kPa, exerted by the gas at a temperature of 120°C.
Give your answer to 3 significant figures.
R = 8.31 J K-1 mol-1
Mr of CO2 = 44.0
kPa
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A flask of volume 2.75 dm3 was found to contain 5.70 g of a gas. The pressure in the flask was 180 kPa and the temperature was 20°C.
Calculate the relative molecular mass of the gas.
Give your answer to 3 significant figures.
R = 8.31 J K-1 mol-1
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Which equations describe an ideal gas?
(Select all that apply.).
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Which of the following unit conversions can be achieved by multiplying by 1,000?
dm3 to m3
°C to K
cm3 to m3
kPa to Pa
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Which of the following unit conversions can be achieved by multiplying by 1,000?
K to °C
m3 to cm3
pa to kPa
m3 to dm3
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Which assumptions are correct for particles of an ideal gas?
(Select all that apply).
their volume is negligible
their collisions are inelastic
no intermolecular forces exist between particles
their kinetic energy is unrelated to temperature
their motion is predictable
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What type of motion do particles in a liquid exhibit?
random motion while still close together
no motion
rapid, random motion
vibration about fixed positions
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Which state of matter has low density and high compressibility?
liquid
plasma
gas
solid
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According to the kinetic theory, what does the temperature of a gas relate to?
average kinetic energy of particles
total kinetic energy of particles
average potential energy of particles
total potential energy of particles
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Which of the following is NOT an assumption of the kinetic theory of gases?
the volume of gas particles is negligible compared to empty space
collisions between particles are elastic
gas particles move rapidly and randomly
there are strong intermolecular attractions between particles
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Which of the following gases come closest to behaving as an ideal gas?
helium
carbon dioxide
nitrogen
oxygen
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In the ideal gas equation (pV = nRT), what does the variable 'n' represent?
temperature
volume
moles of gas
pressure
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When using the ideal gas equation, what unit should temperature be expressed in?
kelvin (K)
celsius (°C)
fahrenheit (°F)
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Under which conditions do real gases deviate most from ideal gas behavior?
low pressure and high temperature
low pressure and low temperature
high pressure and low temperature
high pressure and high temperature
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Which of the following is NOT a property of solids?
particles can move around freely
high density
difficult to compress
particles vibrate about fixed positions
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What is the term for a hypothetical gas that obeys all the assumptions of the kinetic theory?
gas
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Explain two reasons why real gases deviate from ideal gas behavior, particularly under extreme conditions of high pressure and low temperature.
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