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At same temperature pressure 3 litres gas A and 9 litres gas B react. What is the simple ratio?

Answer and explanation

Correct answer: 1:3

The volume ratio of gas A to gas B is 3:9. Dividing both terms by 3 gives the simplest ratio, 1:3. At the same temperature and pressure, gas volumes are proportional to their number of moles, so this is the reaction volume ratio. 3:1 is the reversed ratio. Exam tip: simplify a ratio by dividing both terms by their highest common factor.

Related tags

Chemical CombinationGas Volume RatioGay-Lussac LawMole ConceptClass 11 ChemistryLaws Of Chemical CombinationSome Basic Concepts Of ChemistryChemistry

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