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If 1 volume nitrogen and 3 volumes hydrogen combine what is the ratio?

Answer and explanation

Correct answer: 1:3

The direct answer is option A: 1:3. A ratio compares quantities in the same order in which they are stated. Here the first quantity is nitrogen, with 1 volume, and the second is hydrogen, with 3 volumes. Step 1: write nitrogen volume = 1. Step 2: write hydrogen volume = 3. Step 3: form nitrogen : hydrogen = 1:3. Option A is therefore correct. Option B, 3:1, reverses the order and would mean hydrogen:nitrogen rather than nitrogen:hydrogen. Option C, 1:1, incorrectly says the volumes are equal. Option D, 2:3, changes the given nitrogen amount without any reason. This question asks for the stated volume ratio, not a balanced chemical equation or the volume of product formed. Memory cue: keep the names in the question order, then attach their numbers.

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ChemistryLawsCombination

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