What is the dipole moment of CH4 and CCl4? What is the dipole moment of CH3OCH3 and CH3NH2? Which has a higher dipole moment, cis-CHCl=CHCl or trans-CHF=CHF, is trans usually smaller?

Give the number of lone pairs around the central atom and the molecular geometry of the H20 molecule. 1 lone pair, bent 3 lone pairs, bent 3 lone pairs, linear 2 lone pairs, bent O lone pairs, linear

Indicate the hybridization of each of the carbon atoms in the structure below.

Does a phosphorus-carbon bond have a significant dipole moment?

How many "central" atoms are part of ethylene glycol, a component of antifreeze? What are teh molecular geometries of each central atom? Is the molecule polar or non-polar? Why?

CH3OCH3 and CH3C(O)CH3 have similar formulas and molar masses, but their dipole moments are quite different. Predict which compound has the higher boiling point and explain why.

Identify the compound with the smallest dipole moment in the gas phase. OHF OCHBr3 0 H2 O BrF O Nal

Which of the four has the smallest angle between the H–C–H bonds?

What are the angles a and b in the actual molecule of which this is a Lewis structure? H H H C H a a = C b = ⁰ C H Note for advanced students: give the ideal angles, and don't worry about small differences from the ideal that might be caused by the fact that different electron groups may have slightly different sizes. H X

1. The capsicum molecule is shown below, and one tetrahedral center has been identified. Re-draw or download the structure and use arrows to identify three other centers that have a different molecular geometry. Label each one with its molecular geometry. You must choose centers that all have different molecular geometry from each other, and you may NOT use another tetrahedral center.