Why is the H–N–H angle in NH3 smaller than the H–C–H bond angle in CH4? Why is the H–N–H angle in NH4 + identical to the H–C–H bond angle in CH4?

Formamide, HC(O)NH2, is prepared at high pressures from carbon monoxide and ammonia, and serves as an industrial solvent (the parentheses around the O indicate that it is bonded only to the carbon atom and that the carbon atom is also bonded to the H and the N atoms). Two resonance forms (one with formal charges) can be written for formamide. Write both resonance structures, and predict the bond angles about the carbon and nitrogen atoms for each resonance form. Are they the same? Describe how the experimental determination of the HNH bond angle could be used to indicate which resonance form is more important.

True or false The F – N – F bond angle in NF3 is smaller than the H – N – H bond angle in NH3.

In the following molecule, what is the C-C=C bond angle for carbon A and the H-C=C bond angle for carbon A?

In the following molecule, what is the H-C-C bond angle for carbon b and  what is the O=C-O bond angle for carbon c?

Acrylamide, H2 C=CHC(=0)NH2 , is a known neurotoxin and possible carcinogen. It was a shock to all consumers of potato chips and french fries a few years ago when it was found to occur in those products. H C -N -H C H a Identify all bond angles. O The bond angles around N are approximately 120°. All other angles are 109°. O The bond angles around N are approximately 90°. All other angles are 120°. O The bond angles around N are approximately 109°. All other angles are also 109°. O The bond angles around N are approximately 120°. All other angles are also 120°.

What are the angles a and b in the actual molecule of which this is a Lewis structure? H H C H a H C ^ b C a = 11° b=0° H -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. X 3

What is the FE–S– O bond angle in SOF4?

Which of the following has the smallest ideal bond angle? CHO2 HCN PF3 H2S O All have the same bond angle

Which of the following is false. the bond angle in water is smaller than in ammonia because the atomic radius of oxygen is bigger than the one of nitrogen. the bond angle in water is smaller than in ammonia because the O-H bond is shorter than the N-H bond. the bond angle in water is smaller than in ammonia because of the bigger number of lone pairs on the central atom.