A carbon forms one bond to an X atom plus three more bonds to three hydrogen atoms. If the hybridization to X has 81% p-character, what is the H-C-X bond angle in degrees to the nearest tenth of a degree? Hint: recall our discussion of Bent's rule and Coulson's directionality theorem. To determine the LaTeX: \lambdaλH value, consider the "conservation of p-character" rule, which states that the sum from i = 1 to 4 of LaTeX: \lambdaλi/(1 + LaTeX: \lambdaλi) = 3. Thus, LaTeX: \lambdaλH = 2 + 3/LaTeX: \lambdaλX.