Assertion (A) : Following is a balanced chemical equation for the action of steam on iron : 3Fe + 4H2O → Fe3O4;+ 4H2Reason (R): The law of conservation of mass holds good for a chemical equation.

Both assertion(A) and reason(R) are correct and assertion is the correct explanation for reason.

Iron metal(Reactive Metal)displaces hydrogen from water leading to the formation of iron(III) oxide(solid precipitates) and the liberation of hydrogen gas, the reaction takes place for a long duration.
The formation of iron oxide from iron and water is called the rusting of iron.
The brown color layer that forms on the iron is iron oxide.

The law of conservation of mass states that in a chemical reaction mass is neither created nor destroyed holds true for this equation.

 

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Both (A) and (R) are true and (R) is the correct explanation of the assertion. 

Explanation for assertion:-

When iron reacts with steam the products that are formed are Iron (II, III) oxide and hydrogen gas.Here the number of moles of atoms on both sides (reactant and product) is the same.Therefore, the chemical equation is balanced.Thus the assertion is true.

Explanation for reason:-

Law of conservation of mass states that mass can neither be created nor be destroyed, it can only be transformed from one form to another in a chemical reaction.Thus for a chemical equation to obey the law of conservation of mass, it has to be balanced.Here in the reaction, the number of moles of atoms on both sides (reactant and product) is the same.

Therefore, the mass of the reactants is the same as the mass of the products.

Thus law of conservation of mass holds good for a chemical equation.

Thus the reason is also true and is the correct explanation for the assertion.

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Explanation for assertion:-

 

When iron reacts with steam the products that are formed are Iron (II, III) oxide and hydrogen gas.

The complete reaction

Here the number of moles of atoms on both sides (reactant and product) is the same.

Therefore, the chemical equation is balanced.

Thus the assertion is true.

Explanation for reason:-

 

Law of conservation of mass states that mass can neither be created nor be destroyed, it can only be transformed from one form to another in a chemical reaction.

Thus for a chemical equation to obey the law of conservation of mass, it has to be balanced.

Here in the reaction, the number of moles of atoms on both sides (reactant and product) is th

e same.

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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. read less

Yes, both the assertion and the reason are correct. The given chemical equation describes the reaction of steam with iron to produce iron(II,III) oxide (Fe3O4) and hydrogen gas. This equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed in a chemical reaction, ensuring that the number of atoms of each element on both sides of the equation remains balanced. read less