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If the total product formed is 41 grams and one reactant was 16 grams what was the other reactant?

Answer and explanation

Correct answer: 25 grams

This is a direct application of conservation of mass, one of the basic laws of chemical combination. The total mass before the reaction must equal the total mass after the reaction when the reaction is considered in a closed system. Let the second reactant weigh x grams. Then x + 16 = 41. Solving gives x = 41 − 16 = 25 grams. Hence, option C is correct. Option A confuses the known reactant with the unknown one, option B states the total product rather than the missing quantity, and option D is the result of an incorrect subtraction. A quick check confirms the answer because 25 + 16 = 41 grams.

Related tags

ChemistryLaws-Of-Chemical-CombinationMass-ConservationLaws Of Chemical CombinationSome Basic Concepts Of ChemistryClass 11 Mcq

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