4.21 under biochemical standard conditions, aerobic respiration produces approximately 38 molecules of atp per molecule of glucose that is completely oxidized. (a) what is the percentage effi ciency of aerobic respiration under biochemical standard conditions? (b) th e following conditions are more likely to be observed in a living cell: pco2 = 53 mbar, po2 = 132 mbar, [glucose] = 5.6 × 10−2 mol dm−3, [atp] = [adp] = [pi] = 1.0 × 10−4 mol dm−3, ph = 7.4, t = 310 k. assuming that activities can be replaced by the numerical values of molar concentrations, calculate the effi

Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next