Question

1. which of the following molecules has a trigonal pyramidal shape? a. water (h₂o) b. carbon dioxide (co₂) c. ammonia (nh₃) d. methane (ch₄)

Explanation:

Water ($H_2O$) has a bent - V - shaped molecular geometry due to two lone pairs on the oxygen atom. Carbon dioxide ($CO_2$) is linear as it has two double bonds and no lone pairs on the central carbon atom. Ammonia ($NH_3$) has a central nitrogen atom with three bonding pairs and one lone pair, resulting in a trigonal pyramidal shape. Methane ($CH_4$) has a tetrahedral shape with four bonding pairs and no lone pairs on the central carbon atom.

Answer:

c. Ammonia ($NH_3$)