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In which law is the total mass on the reactant side equal to the total mass on the product side?

Answer and explanation

Correct answer: Law of conservation of mass

The governing concept is the law of conservation of mass. In an ordinary chemical reaction carried out in a closed system, matter is neither created nor destroyed; atoms are only rearranged into new substances. Consequently, the total mass of all reactants equals the total mass of all products. For example, if 10 g of reactants form products, the products together must have a mass of 10 g, apart from measurement or experimental losses. Thus option A is correct. The law of definite proportions says that a pure compound has a fixed element-by-element mass ratio. The law of multiple proportions compares two compounds made from the same elements, while reciprocal proportions concerns combining ratios among elements. None of those directly states equality of total mass.

Related tags

Conservation Of MassChemical LawsReactants And ProductsLaws Of Chemical CombinationSome Basic Concepts Of ChemistryChemistryClass 11 Mcq

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