The average oxygen content of arterial blood is approximately `0.25 g` of `O_2` per litre. Assuming a body temperature of `37^(@)C`, how many moles of oxygen are transported by each litre of arterial blood and how many millilitres?

Options

A. `7.8 xx 10^(-3)` and 200 mL
B. `6.8 xx 10^(-3)` and 200 mL
C. `7.8 xx 10^(-3)` and 100 mL
D. `6.8 xx 10^(-5)` and 100 mL

Answer

A

Explanation

The number of moles of oxygen per litre of blood is `(1 "mol" O_(2))/(32 g O_(2)) xx 0.25 g O_(2) = 7.8 xx 10^(-3) mol O_(2)`
`therefore` the volume of oxygen is `V = (nRT)/(p) = (7.8 xx 10^(-3) xx 0.0821 xx 310)/(1) = 0.2 L = 200 mL O_(2)`