Step 1: State the chemical formula for each compound.
- a) Nitrogen gas: Nitrogen exists as a diatomic molecule.
N2
- b) Carbon (IV) oxide: Carbon with an oxidation state of +4, bonded to oxygen. This is commonly known as carbon dioxide.
CO2
- c) Ammonia: A common inorganic compound of nitrogen and hydrogen.
NH3
Step 2: Name the following organic compounds.
- i) CH3C(=O)OCH2CH3
This is an ester. The acid part is derived from ethanoic acid (2 carbons), and the alcohol part is derived from ethanol (2 carbons).
Ethylethanoate
- ii) CH3CH2C(=O)OCH2CH2CH3
This is an ester. The acid part is derived from propanoic acid (3 carbons), and the alcohol part is derived from propanol (3 carbons).
Propylpropanoate
- iii) CH3CH2CH2CH2OH
This is a primary alcohol with a 4-carbon chain and the hydroxyl group on the first carbon.
Butan−1−ol
Step 3: Draw the structural isomers of C5H10.
The formula C5H10 indicates that the compounds are either alkenes (containing one double bond) or cycloalkanes.
-
Alkenes:
- Pent-1-ene
CH2=CH−CH2−CH2−CH3
- Pent-2-ene (cis and trans isomers exist, but only the structural isomer is shown)
CH3−CH=CH−CH2−CH3
- 2-Methylbut-1-ene
CH2=C(CH3)−CH2−CH3
- 3-Methylbut-1-ene
CH2=CH−CH(CH3)−CH3
- 2-Methylbut-2-ene
CH3−C(CH3)=CH−CH3
-
Cycloalkanes:
6. Cyclopentane
CH2−CH2∣∣CH2CH2\/CH2
7. Methylcyclobutane
CH(CH3)−CH2∣∣CH2CH2
8. 1,1-Dimethylcyclopropane
CH2/\C(CH3)2−CH2
9. 1,2-Dimethylcyclopropane (cis and trans isomers exist, but only the structural isomer is shown)
CH(CH3)/\CH(CH3)−CH2
10. Ethylcyclopropane
CH2/\CH(CH2CH3)−CH2