chemistry
posted by Erin 12 .
What is the partial pressure of CO2 (torr)in exhaled breathe at 37 degree C. if the partial pressure of O2 is 116 (torr) and that of Nitrogen is 569 (torr). Assume atmospheric pressure is 1 atm. kindly help me with this problem

pN2 + pO2 + pCO2 = Ptotal = 760 torr.
Substitute and solve for pCO2.