Mean Free Path

The mean free path of molecules of a certain gas at STP is $1500d$, where $d$is the diameter of the gas molecules. While maintaining the standard pressure, the mean free path of the molecules at $373 K$ is approximately:

In a gas at STP, if $n$ is the number density of the molecules and $r$ is the radius of the molecule, then the mean free path of the molecule is inversely proportional to

Why do gases conduct electricity at low pressure?

On any planet, the presence of atmosphere implies ($C_{rms}=$ root mean square velocity of molecules and $V_e=$ escape velocity)

 The rms speed of gas molecules is given by

 A car is moving with an initial velocity of 30 m/s and it touches its destiny at 80 m/s. Calculate its average velocity. 

What is the formula for average velocity?

How do you find average velocity from two points?

The collision frequency of nitrogen molecule in a cylinder containing at $2.0 \mathrm{atm}$ pressure and temperature $17°\mathrm{C}$ is approximately: (Take radius of a nitrogen molecule is $1.0 \mathrm{Å}$)

The root mean square velocity,${\mathrm{v}}_{\mathrm{rms}}$, the average velocity ${\mathrm{v}}_{\mathrm{av}}$ and the most probable velocity, ${\mathrm{v}}_{\mathrm{mp}}$ of the molecules of the gas are in the order.

The mean free path and RMS velocity of a nitrogen molecule at a temperature $17 °\mathrm{C}$ are $1.2\times {10}^{-7}$ $\mathrm{m}$ and $5\times {10}^2 \mathrm{m} {\mathrm{s}}^{-1}$, respectively. The mean time between two successive collisions will be $x\times {10}^{-11} \mathrm{s}$, what is the value of $x$.

The mean free path of molecules of a gas (radius ‘$r$’) is inversely proportional to $r^2$.

The mean free path $\left(\mathrm{\lambda }\right)$ of a gas sample is given by:

If the temperature and pressure of a gas is doubled the mean free path of the gas molecules

For a molecule of an ideal gas, the number density is $2\sqrt{2}\times {10}^8 {\mathrm{cm}}^{-3}$ and the mean free path is $\frac{{10}^{-2}}{\pi } \mathrm{cm}$. The diameter of the gas molecule is

The mean free path of molecules of a gas (radius $\text{'}r\text{'}$) is inversely proportional to

If temperature of a gas in closed container is doubled, then mean free path of gas molecules will be

Find $\mathrm{r}.\mathrm{m}.\mathrm{s}.$ velocity of three molecules having velocities $10\mathrm{km}/\mathrm{s}, 20\mathrm{km}/\mathrm{s}, 30\mathrm{km}/\mathrm{s}.$, $$

Define the following 

Root mean square velocity for the gas molecules.

Define the following 

Mean square velocity