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    Question

    At normal temperature and atmospheric pressure, ______

    has a density of 1.87 kg/mᶟ, which is 1.5 times heavier than air and exists as a liquid below the critical temperature of 31°C.
    A carbon dioxide Correct Answer Incorrect Answer
    B nitrogen Correct Answer Incorrect Answer
    C hydrogen Correct Answer Incorrect Answer
    D lithium Correct Answer Incorrect Answer

    Solution

    The correct answer is A

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