The fraction of molecular volume to the actual volume occupied by oxygen gas at STP is: (Take the diameter of an oxygen molecule to be 3 Å).

1 4×10-42 5×10-43 3×10-44 1×10-4

Subtopic:  Ideal Gas Equation |
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Molar volume is the volume occupied by 1 mol of any (ideal) gas at standard temperature and pressure (STP: 1 atmospheric pressure, 0 °C) is:

(1) 0

(2) 22.4 Liters

(3) 11.2 Liters

(4) 1 Liter

Subtopic:  Ideal Gas Equation |
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The figure shows a plot of PV/T versus for 1.00×10-3 kg of oxygen gas at two different temperatures.

Then relation between T1 and T2 is:

1. T1=T22. T1<T23. T1>T24. T1T2

Subtopic:  Ideal Gas Equation |
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The figure shows a plot of PV/T versus for 1.00×10-3 kg of oxygen gas at two different temperatures.

The value of PV/T where the curves meet on the y-axis is:

1. 0.06 J K-12. 0.36 J K-13. 0.16 J K-14. 0.26 J K-1

Subtopic:  Ideal Gas Equation |
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An oxygen cylinder of volume 30 litres has an initial gauge pressure of 15 atm and a temperature of 27 °C. After some oxygen is withdrawn from the cylinder, the gauge pressure drops to 11 atm, and its temperature drops to 17 °C. The mass of oxygen taken out of the cylinder is: R=8.31 mol-1K-1, molecular mass of O2=32 u

(1) 0.14 kg

(2) 0.16 kg

(3) 0.18 kg

(4) 0.21 kg

Subtopic:  Ideal Gas Equation |
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An air bubble of volume 1.0 cm3 rises from the bottom of a lake 40 m deep at a temperature of 12 °C. To what volume does it grow when it reaches the surface, which is at a temperature of 35 °C?

1 5.3 cm32 4.0 cm33 3.7 cm34 4.9 cm3

Subtopic:  Ideal Gas Equation |
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What is the total number of air molecules (inclusive of oxygen, nitrogen, water vapor, and other constituents) in a room of capacity 25.0 m3 at a temperature of 27 °C and 1 atm pressure?

1. 6.1×1023 molecules2. 6.1×1026 molecules3. 7.1×1023 molecules4. 7.1×1026 molecules

Subtopic:  Ideal Gas Equation |
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What is the average thermal energy of a helium atom at room temperature (27 °C)?

1. 11.21×10-20 J2. 3.09×10-16 J3. 6.21×10-21 J4. 5.97×10-19 J

Subtopic:  Law of Equipartition of Energy |
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At what temperature is the root mean square speed of an atom in an argon gas cylinder equal to the RMS speed of a helium gas atom at – 20 °C? (atomic mass of Ar = 39.9 u & of He = 4.0 u).

1 1.01×103 K2 3.15×103 K3 1.91×103 K4 2.52×103 K

Subtopic:  Types of Velocities |
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From a certain apparatus, the diffusion rate of hydrogen has an average value of 
28.7 cm3 s-1. The diffusion of another gas under the same conditions is measured to have an average rate of 7.2 cm3 s-1. The unknown gas is:
1 Oxygen2 Nitrogen3 Helium4 None of these
Subtopic:  Types of Velocities |
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