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Which of the following statements is correct according to the law of conservation of mass?
Mass can be created but cannot be destroyed in a chemical reaction.
Mass can neither be created nor be destroyed in a chemical reaction.
Mass can be destroyed in a chemical reaction.
Mass can be created in a chemical reaction.
Mass can neither be created nor be destroyed in a chemical reaction.
According to the law of conservation of mass, mass can neither be created nor be destroyed in a chemical reaction. This means that the total mass of the reactants must equal the total mass of the products.
According to the law of conservation of mass, mass can neither be created nor be destroyed in a chemical reaction. This means that the total mass of the reactants must equal the total mass of the products.
If you burn a piece of wood in a closed container, the total weight of the wood and oxygen before burning equals the weight of the resulting ash, smoke, and gases trapped inside.
Mass in = Mass out (Conservation is key!)
Mass┬аof┬аReactants=Mass┬аof┬аProducts тАФ Law of Conservation of Mass
E=mc2 тАФ Mass-energy equivalence (relativistic consideration)
In any physical or chemical change, the total mass of isolated systems remains constant. Antoine Lavoisier formulated this fundamental law, which asserts that atoms are neither created nor destroyed during a chemical reaction, but are merely rearranged into different combinations.
Formulated by Antoine Lavoisier in 1789.
Forms the basis for balancing chemical equations.
Applies to all chemical reactions and physical changes under normal conditions.
Allows stoichiometric calculations in chemistry.
Helps in predicting the yield of products in chemical manufacturing.
Does not account for mass-energy conversions in nuclear reactions where mass defect occurs (╬Фm=c2╬ФEтАЛ).
Balancing chemical equations in industrial and laboratory processes
Stoichiometry and quantitative chemical analysis
Option B is the standard, universally accepted statement of the Law of Conservation of Mass.
Options A, C, and D violate the fundamental conservation laws of chemistry.
B is correct тАФ Mass can neither be created nor be destroyed in a chemical reaction.
Remember that while chemical reactions conserve total mass and atoms, nuclear reactions involve a conversion between mass and energy according to Einstein's equation E=mc2.
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