Question

Hemoglobin is the protein that transports O₂ through the blood from the lungs to the rest of the body. In doing so, each molecule of hemoglobin combines with four molecules of O₂. If 1.34 g of hemoglobin combines with 2.10 mL of O₂ at 37°C and 726 torr, what is the molar mass of hemoglobin?

_____×10___ g/mol

(Enter your answer in scientific notation.)

Answer 1

no of mol of O2 = PV/RT

                 = ((726/760)*2.1*10^-3/(0.0821*310.15))

                 = 7.88*10^-5 mol

no of mol of hemoglobin = 7.88*10^-5*1/4 = 1.97*10^-5 mol

molarmass of hemoglobin = w/n

                   = 1.34/(1.97*10^-5)

                   = 6.8*10^4 g/mol