2.2 Exercise 27

In the problems in this section, assume all gases are ideal.

Dry air consists of approximately $78 \% \text{nitrogen} , 21 \% \text{oxygen} , \text{and} 1 \% \text{argon}$ by mole, with trace amounts of other gases. A tank of compressed dry air has a volume of 1.76 cubic feet at a gauge pressure of 2200 pounds per square inch and a temperature of 293 K. How much oxygen does it contain in moles?