13. Formic acid (HCOOH) has a . What is the in a solution that is initially 0.10 M formic acid? (A) (B) (C) (D) (E) none of these

17. Which one of the following statements about solid Cu (face-centered cubic unit cell) is incorrect? (A) The solid has a cubic closest-packed structure. (B) The number of atoms surrounding each Cu atom is 12. (C) There are two atoms per unit cell. (D) The length of a face diagonal is four times the Cu radius. (E) none of these.