Chapter 9, Problem 7P

ILW In the ammonia (NH₃) molecule of Fig. 9-40, three hydrogen (H) atoms form an equilateral triangle, with the center of the triangle at distance d = 9.40 × 10⁻¹¹ m from each hydrogen atom. The nitrogen (N) atom is at the apex of a pyramid, with the three hydrogen atoms forming the base. The nitrogen-to-hydrogen atomic mass ratio is 13.9, and the nitrogen-to-hydrogen distance is L = 10.14 × 10⁻¹¹ m. What are the (a) x and (b) y coordinates of the molecule’s center of mass?

Figure 9-40 Problem 7.