A gas occupies a volume of $250ml$ at $745mm$ $Hg$ and ${25}^{o}C$. What additional pressure is required to reduce the gas volume to $200mL$ at the same temperature?

Q. A gas occupies a volume of $250mL$ at $745mm$ $Hg$ and ${25}^{o}C$. What additional pressure is required to reduce the gas volume to $200mL$ at the same temperature?

Q. A gas occupies a volume of $250$ ml at $745$ mm Hg and ${25}^{\circ }$C. What additional pressure is required to reduce the gas volume to $200$ ml at the same time?

Q. A gas occupies a volume of $250c{m}^3$ at $745torr$ and ${25}^{\circ }C$. What additional pressure is required to reduce the gas volume to $200c{m}^3$ at the same temperature?

Q. At a constant temperature a gas occupies a volume of $200ml$ at a pressure of $0.720$ bar. It is subjected to an external pressure of $0.900$ bar. What is the resulting volume of the gas?

Q. At ${25}^{o}C$ and $760mm$ of $Hg$ pressure, a gas occupies $600mL$ volume. What will be its pressure at a height where temperature is ${10}^{o}C$ and volume of the gas is $640mL$?