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What is the approximate value of the H−C−H bond angles in methane, CH4?

What is the molecular geometry at the nitrogen atom in the following compound?

Which of the following compounds has a net dipole moment of zero?

Bonus question Which of the following best explains if H2O is a suitable reagent to protonate the compound shown below?

When forming molecular orbitals from atomic orbitals, what is the order of increasing C-H bond strength for the following set?

What are the formal charges on boron and oxygen in the following structure?

Identify the expected product for the following reaction.

Bonus question For the following acid-base reaction, predict which side of the equilibrium is favored. 

For the following reaction, identify the Lewis acid and the Lewis base.

Bonus question For the structure shown in the box below identify corresponding correct resonance structures.