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Epidermoid cysts are a relatively common occurrence for many people. Several people refer to epidermoid cysts as sebaceous cysts, but this is a common mistake. According to the Mayo Clinic, real sebaceous cysts are uncommon and originate from the sebaceous glands that lubricate hair and skin. Usually painless, epidermoid cysts do not often require …
The hybrid orbitals used by N in the NH3 molecule are predicted by first writing the Lewis structure, then using the VSEPR model to determine the electron-domain geometry, and then specifying the hybrid orbitals that correspond to that geometry. Notice that this is essentially the same procedure as that used to determine molecular structure (Figure 9.5), except the final focus is on the orbitals used to make two-electron bonds and to hold nonbonding pairs.