How can we understand that chemical equations and reactions?

1.	How can we understand that chemical equations and reactions?
Answer» Chemical reactions are the processes in which new substances with new properties are formed. Example - When magnesium ribbon is heated, it burns in air to form a white powder called magnesium oxide.2Mg + O2\xa02MgODuring a chemical reaction, atoms of one element do not change into those of another element. Only a rearrangement of atoms takes place in a chemical reaction. In a chemical reaction, reactants are transformed into products. The substances which take place in a chemical reaction are called reactants. The new substances produced as a result of chemical reaction are called products.\xa0The method of representing a chemical reaction with the help of symbols and formulae of substances involved in it is called a chemical equation.Example: Zinc metal reacts with dilute sulphuric acid to form zinc sulphate and hydrogen gas. This equation is written as: Zn + H2SO4\xa0ZnSO4 + H2

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