Arrange the states of matter (solid,liquid,and gas) in increasing order of their energy.

When the pressure of $1 \ mol$ of ammonia gas changes from $1 \ atm$ to $0.5 \ atm$ at constant temperature,the number of molecules will:

At $T \ K$ and pressure $P$,the diffusion rate of an ideal gas is $120 \ mL \ min^{-1}$. What is the time taken (in sec.) for $3000 \ mL$ of this gas for diffusion at same temperature and pressure?

$40 \ mL$ of hydrogen diffuses through a fine hole in $25 \ min$. How much time (in $min$) will $20 \ mL$ of oxygen take to diffuse under the same conditions?

Air at sea level is dense. This is a practical application of

At a certain temperature and pressure,helium diffuses $n$ times faster than methane. Find the value of $n$.