Respuesta :
The correct answer is b. Law of Definite Composition.
Further Explanation
A) Law of Conservation of Mass
FALSE. This law describes the masses of substances before and after a reaction as constant. Atoms only rearrange in during chemical reactions. None is destroyed nor are any new atoms created. Therefore, the total mass of reactants must always be equal to the total mass of the products.
B) Law of Definite Composition
TRUE. Sometimes called the Law of Constant Composition, this law states that regardless of the source of a compound, its composition is the same. The mass percentages of the elements that make up a particular compound is constant. KCl, in the example, will always have 1 mol of potassium ions and 1 mole of chloride per mole of the potassium chloride regardless of whether it was from Chile or Poland.
C) Law of Multiple Proportion
FALSE. This law describes how an element combines with another element to form multiple compounds. The ratio at which they combine are in whole numbers.
D) Law of Conservation of Mass and Definite Composition
FALSE. The Law of Conservation of Mass pertains to what happens to masses of substances before and after a chemical reaction. This problem is about different sources of a compound and not about a specified chemical reaction.
E) Law of Conservation of Mass and Multiple Proportions
FALSE. The problem is about the mass percentage of compounds from different sources, not about the reaction of the compound nor other compounds formed by potassium and iodine.
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Keywords: Law of Definite Proportion, Law of Constant Composition
Laws gave ideas about conservation, composition, and proportions. The same percent by mass of the potassium in the sample indicates the law of definite composition. Thus, option b is correct.
What is the law of definite composition?
The law of definite composition states the constant composition of the chemical compound irrespective of the place they are. The ratio of the element in the compound does not vary because of the source and preparatory methods.
The sample of potassium chloride will have the same proportion of potassium in both Chile and Poland as it is a fixed ratio that does not depend on the source. It ensures the uniform preparation of the chemical compound.
Therefore, the sample will have the same proportion of potassium due to the law of definite composition.
Learn more about the law of definite composition here:
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