Benzene is a molecule with formula C6H6. If it contains no triple bonds, then how many total double bonds and rings does it contain? ()
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β-Phellandrene is a hydrocarbon component of eucalyptus oil whose molecular formula is C10H16. A molecule of β-phellandrene contains 2 π-bonds. How many rings are in β-phellandrene?()
A. 0
B. 2
C. 1
D. 3
E. 2
F. 4
G. 3
H. 5
I. 4 5.An acyclic hydrocarbon with the formula C20H34 has how many pi bonds?
J. 6.0
Which of the following statements about ethene, C2H4, is ()? ()
A. The H-C-H bond angles are approximately 109.5°.
B. All of the hydrogen atoms are in the same plane.
C. There is a total of five sigma bonds.
D. The carbon atoms are sp2 hybridized.
E. The H-C-H bond angles are approximately 120°.
Give the possibilities in structure for a compound with a formula of C6H10. ()
A. no rings, no double bonds, no triple bonds
B. one double bond, or one ring
C. two rings, two double bonds, one double bond + one ring, or one triple bond
D. three rings, three double bonds, two double bonds + one ring, one ring + two double bonds, one triple bond + one ring, or one double bond + one ring
E. benzene
写出英文名: 氟:______ ；氟甲烷: ______ methane
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