Solution: A gas mixture contains 75.2% nitrogen and 24.8% krypton by mass.What is the partial pressure of krypton in the mixture if the total pressure is 776 mm Hg ?

Problem

A gas mixture contains 75.2% nitrogen and 24.8% krypton by mass.

What is the partial pressure of krypton in the mixture if the total pressure is 776 mm Hg ?

Solution
  • Convert this following mass percent to moles to find the mole fraction of N2 and Kr. 
  • Then use provided total pressure to determine the partial pressure of each gas by multiplying the mole fraction of gas to the total P of solution:

  • Assume that the % mass given were mass in grams, then convert it to moles

MM of N2: N - 14.01 (2) = 28.02 g/mol

MM of Kr: 83.80 g/mol

Solution BlurView Complete Written Solution