“Value of Boltzmann constant for different gases will be different.” True or false?

Molecules of a gas behave like

What are the characteristics of the molecular model of an ideal gas according to the kinetic theory of gases?

What are the three fundamental states of matter? Explain them briefly.

What is an ideal gas?

Modern vacuum pumps can evacuate a vessel down to a pressure of $4.0 \times 10^{-15} \, atm$ at room temperature $(300 \, K)$. Taking $R = 8.0 \, J \cdot K^{-1} \cdot mol^{-1}$,$1 \, atm = 10^5 \, Pa$,and $N_A = 6 \times 10^{23} \, mol^{-1}$,the mean distance between molecules of gas in an evacuated vessel will be of the order of: