Answer Happy

A sample of hydrogen gas occupies a volume of 8.93 L at 55.0°C and 0.920 atm. If it is desired to increase the volume of the gas sample to 11.6 L, while decreasing its pressure to 0.615 atm, the temperature of the gas sample at the new volume and pressure must be °C.
A sample of hydrogen gas occupies a volume of 7.83 L at 61.0°C and 395 torr. - If the volume of the gas sample is decreased to 6.09 L, while its temperature is decreased to - 3.0°C, the resulting gas pressure will be torr.