What is the mean free path for the molecules in an ideal gas when the pressure is 100 kPa and the temperature is 300 K given that the collision cross-section for the molecules of that gas is 2.0 × 10-20 m2?
The Boltzmann constant is 1.38 × 10-23 J/K, Avogadro's number is
6.02 × 1023 molecules/mole, and the ideal gas constant is R = 8.314 J/mol ? K =
0.0821 L ? atm/mol ? K.
A) 1.1 × 10-6 m
B) 2.1 × 10-6 m
C) 1.7 × 10-6 m
D) 5.3 × 10-6 m
E) 1.5 × 10-6 m
Answer: E
You might also like to view...
The star Vega has an absolute magnitude of about 4 and an apparent magnitude of about 0. Based on the definitions of absolute and apparent magnitude, we can conclude that ________
A) Vega's surface temperature is cooler than the Sun B) Vega is nearer than 10 parsecs from Earth C) Vega's luminosity is less than that of our Sun D) Vega has a parallax angle of 1/10 arcsecond
What is the size of a typical granule or convection cell seen in the photosphere?
A) 10,000 km B) 1,000 km C) 100 km D) 10 km E) 1 km
You run a 5000 watt clothes-dryer for 2 hours. How many kilowatt-hours of energy did you consume?
A) 2500 B) 2.5 C) 10 D) 0.4 E) Cannot be determined from the given information
The hot gas of the big bang seems to be cool at about 2.7 K because:
A) the expansion of the Universe has decreased the wavelengths of the radiation emitted by the big bang. B) the gas clouds that emitted the photons during the big bang had a temperature of 2.7 K. C) the expansion of the Universe has redshifted the wavelengths of the radiation emitted by the big bang about 1100 times longer. D) the gas clouds that emitted the photons during the big bang emitted blackbody radiation with a wavelength of 2.7 nm.