a 2.50-l volume of hydrogen has a pressure of 0.113 atm at 21 °c i (a) what is the pressure if the gasis warmed to 100 °c at constant volume (b) what is the pressure if the volume is increased to 7.00-l at constant temperature (c) what is the temperature if the volume is decreased to 1.30-l at constant pressure (d) if the amount of gas is doubled, what volume would be needed to maintain the pressure at ,113 atm and the temperature at 21 °c