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A pure compound contains 12 percent A and 88 percent B. What is the simple mass ratio A:B?

Answer and explanation

Correct answer: 3:22

The percentages represent the relative masses of A and B, so A:B = 12:88. Dividing both terms by 4 gives 3:22. The ratio 22:3 is obtained by reversing the order, so it is incorrect. Exam tip: write the percentages as a ratio and reduce both terms by their greatest common factor.

Related tags

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

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