Organic Chemistry I Answer all, and show any work: Write a condensed structural for each compound given here.

Organic Chemistry I

Answer all, and show any work: 

1. Write a condensed structural for each compound given here.

2. Write bond line formulas for all of the constitutional isomers with the molecular formula C4H8

3. Write two resonance structures for the formate ion HCO2- ?(note: the hydrogen and oxygen atoms are bonded to the carbon)

4. Explain what these structures predict for the carbon-oxygen bond lengths of the formate ion?