Answer true or false.
(a) Conformations have the same molecular formula and the same connectivity but differ in the threedimensional arrangement of their atoms in space.
(b) In all conformations of ethane, propane, butane, and higher alkanes, all C-C-C and H-C-H bond angles are approximately 109.5°.
(c) In a cyclohexane ring, if an axial bond is above the plane of the ring on a particular carbon, axial bonds on the two adjacent carbons are below the plane of the ring.
(d) In a cyclohexane ring, if an equatorial bond is above the plane of the ring on a particular carbon, equatorial bonds on the two adjacent carbons are below the plane of the ring.
(e) The more stable chair conformation of a cyclohexane ring has more substituent groups in equatorial positions.
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