Question

It is necessary to balance chemical equation in order to satisfy the law of:

Conservation of motion

Conservation of momentum

Conservation of energy

Conservation of mass

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Answer 1

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In every chemical equation, the amount of each substance that is element, is always conserved. According to law of conservation of mass and Dalton's atomic theory, the mass and electric charge remains conserved or constant.

• So, To make a balanced equation, we need to add some stoichiometric coefficients in order to satisfy law of conservation of mass. Option (D)

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Whenever there is an chemical reaction due to chemical change, a series of steps are involved which are represented by Chemical equation. It can be written in two ways:

• Word equation
• Symbol equation (Balanced & Unbalanced chemical equation).

And rules for writing chemical equation:

1. The left hand side substances are known a reactants and the right hand side substances are known as products.
2. They are added in each side with a (+) sign.
3. The arrow ($\longrightarrow$) is put between the reactants and products which shows its direction.

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Answer 2

Answer:

According to law of conservation of mass, the mass of products in a reaction must be equal to mass of reactants so the balancing of equations is done to obey this law.

Explanation: