Air consists of about 78.6% nitrogen,20.9% oxygen,0.04% carbon dioxide,and 0.5% water.At sea level, (760 mmHg)what is the PCO₂? A) 597 mm Hg B) 159 mm Hg C) 0.3 mm Hg D) 3.7 mm Hg

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Quizplus · Accepted Answer

The partial pressure of CO2 in air can be calculated using its percentage composition and the total pressure. Given that CO2 makes up 0.04% of air and the total pressure at sea level is 760 mmHg, the partial pressure of CO2 (PCO2) is calculated as 0.04% of 760 mmHg, which is 0.3 mmHg.

Air Consists of About 78