Final answer:
Upon analyzing the molecular geometry of H2O, NH3, CH4, and CO2, it becomes evident that none of these molecules have the same electron set arrangement as the others.
Step-by-step explanation:
The question asks which one of the molecules H2O, NH3, CH4, and CO2 has the same electron set arrangement. To determine this, we need to consider the molecular geometry of each molecule.
Water (H2O) has a bent shape with two bonding pairs and two lone pairs, ammonia (NH3) has a trigonal pyramidal shape with three bonding pairs and one lone pair, methane (CH4) has a tetrahedral shape with four bonding pairs, and carbon dioxide (CO2) has a linear shape with two bonding pairs and no lone pairs. Based on this analysis, none of these molecules share the same electron set arrangement.