What is the partial pressure of the helium gas? Express your answer in millimeters of mercury.

1 Answer
Jul 7, 2017

Answer:

#P_"He" = 203# #"mm Hg"#

Explanation:

According to Dalton's law of partial pressures, the total pressure of the gaseous mixture is equal to the sum of the partial pressures of the gaseous components.

Therefore,

#P_"total" = P_ ("CO"_2) + P_ "Ar" + P_ ("O"_2) + P_ "He"#

#745# #"mm Hg"# #= 133# #"mm Hg"# #+ 214# #"mm Hg"# #+ 195# #"mm Hg"# #+ P_ "He"#

#P_ "He" = color(red)(203# #color(red)("mm Hg"#