Two gases $A$ and $B$ are released from the two ends of a tunnel of length $100 \ m$. $A$ travels $40 \ m$ before meeting the gas $B$ in the tunnel. If the molecular weight of $B$ is $18$, what is the molecular weight of $A$ (in $.5$)?

At constant volume,for a fixed number of moles of a gas,the pressure of the gas increases with an increase in temperature due to:

The Kelvin temperature of an ideal gas is proportional to:

If the kinetic energy in $J$, of $CH_4$ (molar mass $= 16 \ g \ mol^{-1}$) at $T(K)$ is $X$, the kinetic energy in $J$, of $O_2$ (molar mass $= 32 \ g \ mol^{-1}$) at the same temperature is

The diffusion coefficient of an ideal gas is proportional to its mean free path and mean speed. The absolute temperature of an ideal gas is increased $4$ times and its pressure is increased $2$ times. As a result,the diffusion coefficient of this gas increases $x$ times. The value of $x$ is

According to the kinetic theory of gases,the energy per mole of a gas is equal to: