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plz help to get the answer of the attcehd pic.

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albi | Student, Grade 10 | eNotes Newbie

Posted October 31, 2013 at 10:40 AM via web

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plz help to get the answer of the attcehd pic.

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sciencesolve | Teacher | (Level 3) Educator Emeritus

Posted October 31, 2013 at 11:37 AM (Answer #1)

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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)

`O=O`

The `CO_2` molecule contains 2 double bonds `O=C=O` .

The ethene molecule `C_2H_4` contains one double bond between carbon atoms.

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