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If A and B ratio in a compound is 1:4 then how much B is needed for 5 grams A?

Answer and explanation

Correct answer: 20 grams

The given ratio is A : B = 1 : 4. If 1 part of A is 5 g, then 4 parts of B = 4 × 5 = 20 g. Therefore, the correct answer is 20 g. Taking 25 g of B would make the ratio 1:5, not the given 1:4. Exam tip: Find the value of one ratio part first, then multiply it by the required number of parts.

Related tags

Chemical CombinationStoichiometric RatioMass RatioChemical CompositionClass 11 ChemistryLaws Of Chemical CombinationSome Basic Concepts Of ChemistryChemistry

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