A P. answered 03/11/20
Chemical engineer with 15+ years of chemistry teaching experience
Ptot = PA + PB + PC
PC can be found with PV = nRT, 45C=318K
PC*7.75L = 0.190mol * 0.0821 Latm/molK * 318K; solve for PC = 0.64 atm
Ptot = 0.295 atm + 0.776 atm + 0.64 atm = 1.71 atm