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In a compound mass ratio A:B is 2:5. If A is 6 grams how much is B?

Answer and explanation

Correct answer: 15 grams

The mass ratio A:B is 2:5. If 2 parts of A have a mass of 6 g, then 1 part = 3 g. Therefore, the mass of 5 parts of B is 5 × 3 = 15 g. For example, 12 g would give the ratio 6:12 = 1:2, not 2:5. Exam tip: multiply both terms of a ratio by the same factor.

Related tags

ChemistryChemical CombinationMass RatioStoichiometryBasic ConceptsLaws Of Chemical CombinationSome Basic Concepts Of ChemistryClass 11 Mcq

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