Can you me with classification of elements, compounds and mixtures?

1) Air
2) Ammonia
3) Ethanol
4) Iodine

Answer:
Air is a mixture, mostly nitrogen 78%, oxygen 21%, and argon 1%, although those percents are rounded off. There is still room for CO2 and other gases. Ammonia is a compound, NH3. Ethanol is a compound, C2H5OH. Iodine is an element, and it comes in I2 molecules.
1.mixture
2.compound
3.compound
4.compound
1. mixture (combination of a lot of gases)
2. compound (rxn bet nitrogen and hydrogen)
3. cpd (like number 2, however, bet ethyl and alcohol)
4. element (simplest form)

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