This full solution covers the following key subjects: trigonal, molecule, both, clo, described. This expansive textbook survival guide covers 49 chapters, and 5471 solutions. This textbook survival guide was created for the textbook: Chemistry: The Central Science, edition: 12. The answer to “Molecular Shapes; the VSEPR Model (Sections)(a) Methane (CH4) and the perchlorate ion (ClO4-) are both described as tetrahedral. What does this indicate about their bond angles? (b) The NH3 molecule is trigonal pyramidal, while BF3 is trigonal planar. Which of these molecules is flat?” is broken down into a number of easy to follow steps, and 44 words. The full step-by-step solution to problem: 12E from chapter: 9 was answered by Sieva Kozinsky, our top Chemistry solution expert on 04/03/17, 07:58AM. Since the solution to 12E from 9 chapter was answered, more than 258 students have viewed the full step-by-step answer. Chemistry: The Central Science was written by Sieva Kozinsky and is associated to the ISBN: 9780321696724.