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【Daily Question】Chemical Analysis Edition, 2020.5.12

2020-05-12View Original

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This post was last edited by zjp on 2020-5-12 08:39. Multiple-choice question: In a 10-mL sample gas containing CO and N2, an excess of oxygen is added under standard conditions to cause complete combustion of the CO; as a result, the volume of the gas decreases by 2 mL. How many mL of CO is present in the sample gas? A. 2 mL B. 4 mL C. 6 mL B

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