Exercise II on Finding Total Pressure

Assume a 38 liter gas vessel at 35°C contains oxygen at a pressure of 4.5 atmosphere. If all the gas is transferred to a second vessel having a volume of 55 liters, at the same temperature.

Questions:
  1. What would be the pressure of oxygen gas in the second vessel?
  2. How many grams of oxygen were there?
For more details, please contact me here.