Question

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Answer 1

3) a.

4) A balanced chemical equation is one which contains an equal number of atoms of each element on both the sides of the equation.

Answer 2

Decoposition reaction :-

A decomposition reaction is a type of chemical reaction in which a compound is broken down into simpler components. It is the opposite of chemical synthesis, in which elements or relatively simple compounds combine to produce one that is more complex.

If you are referring to the chemical reaction below, the products are hydrogen gas and and iron(III) chloride.

Fe (s) +2HCl (aq) → FeCl2 (aq) + H2 (g)

In terms of physical observations, there will be a period of rapid bubbling as the hydrogen gas escapes and a thin layer of iron(III) chloride may form.