To carry out metabolism, oxygen is taken up by hemoglobin (Hb) to form oxyhemoglobin (HbO₂) according to the simplified equation:

Hb(aq) +O₂(aq) --> HBO₂(aq)

where the second-order rate constant is 2.1 X 10⁶ M⁻¹ s⁻¹ at 37°C. (The reaction is first order in Hb and 02.) For an average adult, the concentrations of Hb and O₂, in the blood at the lungs are 8.0 x10⁶ M and 1.5 x 10M, respectively.
a) Calculate the rate of formation of HbO₂.