Question

A sealed vessel, containing nitrogen dioxide and carbon dioxide if the partial pressure of carbon dioxide in 795 psi?

Answer 1

Missing question: A sealed vessel, containing nitrogen dioxide and carbon dioxide gases has a total pressure of 2558 psi. 

total pressure = partial pressure of nitrogen dioxide + partial pressure of carbon dioxide.
p(total) = 2558 psi; total pressure.
p(CO₂) = 795 psi; partial pressure of carbon dioxide.
p(NO₂) = p(total) - p(CO₂); partial pressure of nitrogen dioxide
p(NO₂) = 2558 psi - 795 psi.
p(NO₂) = 1763 psi(pound-force per square inch).
p(NO₂) = 121.55 bar.