Topical Questions These questions are keyed to the major topics in the chapter. Usually...

Topical Questions

These questions are keyed to the major topics in the chapter. Usually a question that is answered at the back of this book is paired with a similar one that is not.

A sample of the atmosphere at a total pressure of 740. mm Hg is analyzed to give these partial pressures: P(N₂) = 575 mm Hg; P(Ar) = 6.9 mm Hg; P(CO₂) = 0.2 mm Hg; P(H₂O) = 4.0 mm Hg. No other gases except O₂ have appreciable partial pressures.

(a) What is the partial pressure of O₂?

(b) What is the mole fraction of each gas?

(c) What is the composition of this sample in percentage by volume? Compare your results with those of Table 10.1.

Table 10.1