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Representation of a Chemical Equation

Which of the ...

Question

Which of the following is the correct balanced chemical equation for the reaction of iron filings with steam?

3Fe_(s) + H₂O_(l) → 3Fe₃O_4(s) + 4H_2(g)

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3Fe_(s) + 4H₂O_(g) → Fe₃O_4(s) + 4H_2(g)

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Fe_(s) + H₂O_(l) → Fe₃O_4(s) + H_2(g)

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Fe_(s) + 2H₂O_(g) → Fe₃O_4(s) + 2H_2(g)

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Solution

The correct option is B
3Fe_(s) + 4H₂O_(g) → Fe₃O_4(s) + 4H_2(g)

In a balanced equation, the number of atoms of each element should be equal on both the sides. The physical state of a reactant or product is indicated by a symbol written in brackets.

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