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a) In the methan molecule `CH_4` , there exists 8 valence electrons and 4 single bonds, hence, the atoms in `CH_4` share 2 electrons per bond.
In water molecule `H_2O` , each oxygen atom shares 1 electron with the hydrogen atom.
In the ammonia molecule `NH_3` , the 3 hydrogen atoms, that each have 1 electron in the outer shell, share the electron with nitrogen formin 3 covalent bonds.
The `HCl` molecule contains only one bond and it is a polar molecule.
The `CO_2` molecule has two double bonds between the carbon and oxygen atoms.
b) The oxygen atom contains one double bond (each bond represents a pair of shared electrons)
The `CO_2` molecule contains 2 double bonds `O=C=O` .
The ethene molecule `C_2H_4` contains one double bond between carbon atoms.
Posted by sciencesolve on October 31, 2013 at 11:37 AM (Answer #1)
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