Cholesterol (C27H46O) has the following structure: In such shorthand structures, each point where lines meet represents a carbon atom and most H atoms are not shown. All carbon atoms will have the octet rule satisfied.
Indicate which carbon atoms use sp2 hybrid orbitals.

Indicate which carbon atoms use sp3 hybrid orbitals.

Are all carbon atoms in the same plane, as implied by the structure? Explain your reasoning.

Two nitro no2 groups are chemically bonded to a patch of surface. they can't move to another location on the surface, but they can rotate (see sketch at right). it turns out that the amount of rotational kinetic energy each no2 group can have is required to be a multiple of ε, where =ε×1.010−24 j. in other words, each no2 group could have ε of rotational kinetic energy, or 2ε, or 3ε, and so forth — but it cannot have just any old amount of rotational kinetic energy. suppose the total rotational kinetic energy in this system is initially known to be 32ε. then, some heat is removed from the system, and the total rotational kinetic energy falls to 18ε. calculate the change in entropy. round your answer to 3 significant digits, and be sure it has the correct unit symbol.

Explanation for basic character?

Balance the following reaction. as2s3 + 9o2 → 2as2o3 + so2