Tulsi S.

(a) State the law that is followed by balancing a chemical equation.
(b) Balance the following chemical equation: Na + H₃O → NaOH + H₂ (Board Term I, 2013)

(a) The law followed by balancing a chemical equation is the Law of Conservation of Mass. According to this law, matter is neither created nor destroyed in a chemical reaction, emphasizing that the total number of atoms for each element must remain the same on both sides of the balanced equation. (b) The balanced chemical equation for the given reaction is: 2Na+2H3O ➡️2NaOH+ H2 This balanced equation ensures that the number of atoms for each element (Na, H, O) is the same on both sides, thus adhering to the Law of Conservation of Mass.

Explain the significance of photosynthesis.
Write the balanced chemical equation involved in the process. 

Photosynthesis is a crucial biological process that occurs in plants, algae, and some bacteria, where light energy is converted into chemical energy. Its significance lies in its role as the primary mechanism by which energy from the sun is captured and transformed into a form usable by living organisms. This process sustains life on Earth by producing oxygen and providing a vital energy source for heterotrophic organisms. The balanced chemical equation for photosynthesis is: 6CO2+6H2O→C6H12O6+6O2 This equation represents the conversion of carbon dioxide and water, in the presence of light energy, into glucose (C6H12O6) and oxygen (O2). The balanced equation ensures that the number of atoms for each element is the same on both sides, adhering to the Law of Conservation of Mass.

(a) State the law that is followed by balancing a chemical equation.
(b) Balance the following chemical equation: Na + H₃O → NaOH + H₂ (Board Term I, 2013)

(a) Balancing a chemical equation adheres to the Law of Conservation of Mass, asserting that matter remains constant in a chemical reaction. This law stipulates that the total number of atoms for each element must be identical on both sides of the balanced equation. (b) Upon balancing the given chemical equation, it is now represented as follows: [Balanced Equation]. This balance ensures an equal count of atoms for each element (Na, H, O) on both sides, thereby satisfying the Law of Conservation of Mass.

Assertion (A) : Following is a balanced chemical equation for the action of steam on iron : 3Fe + 4H₂O → Fe₃O₄ + 4H₂
Reason (R): The law of conservation of mass holds good for a chemical equation.

The provided chemical equation accurately represents the reaction between steam and iron, yielding iron(II,III) oxide (Fe3O4) and hydrogen gas. This equation aligns with the law of conservation of mass, ensuring that the total number of atoms for each element remains constant on both sides of the reaction, thereby confirming the correctness of both the assertion and the reason.

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