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Fixed 3 grams carbon combines with 4 grams and 8 grams oxygen in different compounds. What is the ratio?

Answer and explanation

Correct answer: 1:2

The mass of carbon is fixed at 3 g in both compounds, so compare the masses of oxygen: \(4:8=1:2\). Therefore, the correct ratio is 1:2. The ratio 2:1 is simply the reverse order. Exam tip: when one element has a fixed mass, reduce the masses of the other element to the simplest whole-number ratio.

Related tags

ChemistryChemical CombinationLaw Of Multiple ProportionsMass RatioClass 11Laws Of Chemical CombinationSome Basic Concepts Of ChemistryClass 11 Mcq

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