• 2022-06-11
    Most chemical reactions of an organic compound involve only a few of its numerous atoms; the remainder stay unchanged.
    A: majority
    B: distribution
    C: rest
    D: stability
  • C

    内容

    • 0

      In organic compounds, single bond is σ bond, only one of double bond and three bond is σ bond, the rest is π bond.

    • 1

      Although the atoms buried in the interior of a protein have no direct contact with the ligand, they provide an essential scaffold that gives the surface its contours and chemical properties.

    • 2

      The structure of this 27-carbon compound suggests a complex biosynthetic pathway, but all of its carbon atoms are provided by a single precursor—_______. A: formic acid B: acetate C: propionate D: pyruvate

    • 3

      The changes of chemical reactions include:

    • 4

      In organic compounds, single bond is σ bond, only one of double bond and three bond is σ bond, the rest is π bond. A: 正确 B: 错误