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Question

Find the value of y.

3Fe+yH2OFe3O4+4H2


A

1

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B

2

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C

3

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D

4

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Solution

The correct option is D

4


Keeping in mind that a balanced chemical equation has equal number of atoms of each element equal on both sides, let us balance the equation given.

Since there are 8 atoms of hydrogen on the products side, filling a 4 in place of y balances the given equation because it also balances the number of atoms of iron and oxygen atoms on both sides.

i.e., 3Fe+4H2OFe3O4+4H2

y = 4.


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