The volume of a gas becomes four times if:

An air bubble of volume $2.9 \ cm^3$ rises from the bottom of a swimming pool $5 \ m$ deep. At the bottom of the pool,the water temperature is $17^{\circ} C$. The volume of the bubble when it reaches the surface,where the water temperature is $27^{\circ} C$,is . . . . . . $cm^3$. ($g = 10 \ m/s^2$,density of water $\rho = 10^3 \ kg/m^3$,and $1 \ atm = 10^5 \ Pa$)

What is the universal gas constant? Write its value and unit.

What is Boltzmann's constant?

$A$ gas of certain mass filled in a closed cylinder at a pressure of $3.23 \ kPa$ has a temperature of $50^{\circ} C$. The gas is now heated until its absolute temperature is doubled. The modified pressure is . . . . . . $Pa$.

Molar volume is the volume occupied by $1 \; mol$ of any (ideal) gas at standard temperature and pressure ($STP$: $1 \; atm$ pressure,$0^{\circ} C$). Show that it is $22.4 \; L$.