If 28.1 g of chromium is produced then the mass of aluminium oxide is produced is 27.5 g.
Cr2O3 + 2Al→2Cr + Al2O3
Through law of conservaion of mass
41.0 + 14.6 = 28.1 + x
55.6 = 28.1 + x
x = 27.5g
What is law of conservation of mass?
Since Antoine Lavoisier discovered that mass is neither created nor destroyed in chemical reactions, the Law of Conservation of Mass has been in existence. Alternatively said, the mass of any one element at the start of a reaction will match the mass of that element at the conclusion of the reaction.
The overall mass in any closed system will remain constant over time if we take into account all reactants and products in a chemical reaction. The discovery made by Lavoisier revolutionized science and set the stage for modern chemistry.
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