One method of analyzing amino acids is the van slyke method. the characteristic aminogroups (nh2) in protein material are allowed to react with nitrous acid, hno2, to form n2 gas. from the volume of the gas, the amount of amino acid can be determined. a 0.0604‑g sample of a biological sample containing glycine, ch2(nh2)cooh, was analyzed by the van slyke method and yielded 3.70 ml of n2 collected over water at a pressure of 735 torr and 29˚c. what was the percentage of glycine in the sample?

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