Review 4 ESO Organic Chemistry

Write the formula of 

1. 2 ethyl 3 hidroxi 4 cyclopentenone 
2. 2 methyl 4 hidroxi 3 hexynoic acid 
3. 2 propyl 5 ethyl 3 hexanodiol
4. 2,4 ciclopentenodiol

Name

An organic branched compound with terminal C=O bonds has a Pm=86g/mol. It has 7% of H and a 55,8%C. Determine its empiric and mollecular formula. Draw its geometric fórmula or its s.d. formula.