Could you please explain how to tell the strength of an acid from looking at its structure? (For neutral acids, remove H+ and evaluate stability of the remaining anion (= conjugate base), taking into consideration electronegativity of atoms holding the negative charge, and number of resonance structures. - GS).

Could you just remind us the difference between the molecular geometry versus the shape? (For molecular geometry, you consider both bonds and lone electron pairs. Next, you remove the lone pairs, do not move any atoms, and that will be the shape. - GS).

Could you explain how to determine the hybridization state of a molecule? (Hybridization state of ATOMS is determined by the geometry around them, which leads to different participation of p-orbitals in the formation of sigma-bonds. - GS).

I was wondering if you can have two sigma bonds or if you can only have multiple pi bonds? (There can not be more than one sigma-bond or more than two pi-bonds between the same pair of atoms because of the space conflict. - GS).