Question

3. Write a chemical equations to show a reaction between a metal and air
4.What are hormones?
5. What do you understand by the term combustion? in one sentence ​

Answer 1

Answer:

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Explanation:

3.Metal+Oxygen-Metaloxide

4.Hormones are chemical messengers that are secreted directly into the blood, which carries them to organs and tissues of the body to exert their functions. There are many types of hormones that act on different aspects of bodily functions and processes. Some of these include: Development and growth.

5.Combustion, a chemical reaction between substances, usually including oxygen and usually accompanied by the generation of heat and light in the form of flame.

Answer 2

3. Ca+2H2O -> Ca(OH)2 + H2

4. The chemicals which regulates our body and helps in our daily metabolic activities. They are known as harmones

5. The burning of a material in presence of oxygen is known Combustion