D Question 14 A collection of argon, helium and nitrogen are in a tank with a pressure of 2.3 atm. If the partial pressure of argon and helium are both 0.70 atm, what is the partial pressure of nitrogen? 0.70 atm 2.3 atm 1.6 atm 0.77 atm 0.90 atm Question 15 Assuming Q14 was done correctly, what is the mole fraction of nitrogen in the gas mixture? 0.61 0.75 0.50 1 pts 1 pts