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Iron(III) oxide is insoluble in water but dissolves readily in strong acid, e.g. hydrochloric and sulfuric acids. It also dissolves well in solutions of chelating agents such as EDTA and oxalic acid.
Answer:
The coefficients are: 1, 2, 1, 2
Explanation:
To know which option is correct, we shall balance the equation. This can be obtained as follow:
SnO₂ + H₂ —> Sn + H₂O
There are 2 atoms of O on the left side and 1 atom on the right side. It can be balance by writing 2 before H₂O as shown below:
SnO₂ + H₂ —> Sn + 2H₂O
There are 2 atoms of H on the left side and a total of 4 atoms on the right side. It can be balance by writing 2 before H₂ as shown below:
SnO₂ + 2H₂ —> Sn + 2H₂O
Now the equation is balanced.
The coefficients are: 1, 2, 1, 2
Thus, none of the options are correct.