Which of the following statements is correct about the reaction is given below?
1. | Total mass of iron and oxygen in reactants = total mass of iron and oxygen in product therefore it follows law of conservation of mass |
2. | Total mass of reactants = total mass of product, therefore, law of multiple proportions is followed |
3. | Amount of Fe2O3 can be increased by taking any one of the reactants (iron or oxygen) in excess. |
4. | Amount of Fe2O3 produced will decrease if the amount of any one of the reactants (iron or oxygen) is taken in excess. |
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