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A pure compound contains 42 percent A and 58 percent B. What is the simple mass ratio A:B?

Answer and explanation

Correct answer: 21:29

The mass percentages of A and B are 42 and 58 respectively, so their mass ratio is 42:58. Dividing both terms by 2 gives the simplest ratio, 21:29. Although 42:58 represents the same ratio, it is not in its simplest form. Exam tip: write the percentages as a ratio and reduce it using the highest common factor.

Related tags

ChemistryChemical Combination LawsMass RatioPercentage CompositionClass 11Laws Of Chemical CombinationSome Basic Concepts Of ChemistryClass 11 Mcq

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