Answer:
PN2 = 191.3kPa
Step-by-step explanation:
Ptotal = PO2 + PCO2 + PN2 + Pothers = 245.0kPA
Work backwards to find PN2
245.0kPA - PO2 - PCO2 - Pothers = PN2
245.0kPA - 51.3kPa - 0.10kPa - 2.3kPa = PN2
245.0 - 51.3 = 193.7
193.7 - .10 = 193.6
193.6 - 2.3 = 191.3