If a sample of neon gas at $75^{\circ}C$ is cooled such that its volume decreases by $15\%$,to what temperature (in $^{\circ}C$) should it be heated so that its pressure becomes double?

Two separate bulbs contain ideal gases $A$ and $B$. The density of gas $A$ is twice that of gas $B$. The molecular mass of $A$ is half that of gas $B$. The two gases are at the same temperature. The ratio of the pressure of $A$ to that of gas $B$ is

$A$ bubble of air is underwater at temperature $15^\circ C$ and the pressure $1.5 \ bar$. If the bubble rises to the surface where the temperature is $25^\circ C$ and the pressure is $1.0 \ bar$,what will happen to the volume of the bubble?

If $500 \ cm^3$ of hydrogen gas is at a pressure of $760 \ mm$ and a temperature of $300 \ K$,what is the number of moles?

Which of the following equations does $NOT$ represent Charles's law for a given mass of gas at constant pressure?

Which of the following expressions at constant pressure represents Charles's law?