Give one example of a compound having a linear molecular structure that has an overall dipole moment (is polar) and one example that does not have an overall dipole moment (is nonpolar). Do the same for molecules that have trigonal planar and tetrahedral molecular structures.

Linear Polar: Hydrogen chloride (HCl) is an example of a linear polar compound due to the difference in electronegativities (H: 2.1, Cl: 3.0) forming an overall dipole. Linear Nonpolar: Carbon dioxide (CO2) is an example of a linear nonpolar compound, as the equal electronegativities of the oxygen atoms cause the dipoles to cancel each other out. Trigonal Planar Polar: Sulfur trioxide (SO3) is an example of a trigonal planar polar compound, with the difference in electronegativities between sulfur and oxygen creating an overall dipole moment. Trigonal Planar Nonpolar: Boron trifluoride (BF3) is an example of a trigonal planar nonpolar compound, as the dipoles cancel each other out due to the symmetry of the trigonal planar structure. Tetrahedral Polar: Ammonia (NH3) is an example of a tetrahedral polar compound, with the electronegativity difference between nitrogen and hydrogen resulting in an overall dipole moment. Tetrahedral Nonpolar: Methane (CH4) is an example of a tetrahedral nonpolar compound, as the molecule contains only nonpolar C-H bonds and the electronegativities of carbon and hydrogen are equal.