A mixture of gases contains 0.75 mol of N 2 , 0.25 mol of O 2 , and 0.25 mol of He. a. What is the partial pressure of each gas (in atm and in torr) in a 25 L cylinder at 350 K? b. What is the total...

A mixture of gases contains 0.75 mol of N 2 , 0.25 mol of O 2 , and 0.25 mol of He. a. What is the partial pressure of each gas (in atm and in torr) in a 25 L cylinder at 350 K? b. What is the total pressure? A mixture of gases contains 0.75 mol of N 2 , 0.25 mol of O 2 , and 0.25 mol of He. a. What is the partial pressure of each gas (in atm and in torr) in a 25 L cylinder at 250 K? b. What is the total pressure?