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Answers
Answer:
1. *oxygen* is called as vital life
2. Nitrogen is *lighter* than air
3. *Nitrogen* is used as a fertilizer
4. Dry ice is used as a *cooling agent*
5. the process of conversion of iron hydrated form of oxides is called *oxygen*
Explanation:
1. Oxygen helps organisms grow, reproduce, and turn food into energy.
2.The molecular weight of a gas is typically equal to its density. Because air has an average molecular weight of roughly 29 g/mol, any gas with a higher molecular weight will be denser than air.
3. Nitrogen is critical to plant growth and reproduction.
4. Dry ice is used for refrigeration of food because: It does not melt into a liquid when heated instead, it sublimes into its gaseous state. Due to its extreme cooling effect, it is used as a cooling agent.
5. Slow oxidation of iron in presence of air and moisture with formation of hydrated iron oxide is called rusting.
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