Question

In a gaseous mixture at 4 atm pressure, 25% of molecules are Nitrogen, 40% of molecules are carbon dioxide and the rest are oxygen. The partial pressure of oxygen in the mixture is:

• A. 1.40 atm
• B. 1.6 atm
• C. 1 atm
• D. 0.9 atm

Answer 1

Answer: (A)

1.40 atm

total pressure $=4atm$

nitrogen $=25\%$

$C{o}_2=40\%$

oxygen $=35$

(portal pressure )$O_2=$ total pressure $\times$(mole tractra)$O_2$

=$4\times \frac{35}{100}$

=$\frac{7}{5}$

=$1.40atm$