The air we breathe is a mixture of gases. What is air? A. A liquid B. A gas C. A solid D. A powder 相关知识点: 试题来源: 解析 B。我们呼吸的空气是气体的混合物。选项 A 液体错误;选项 C 固体错误;选项 D 粉末错误。反馈 收藏 ...
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A liquid is a type of matter with specific properties that make it less rigid than asolidbut more rigid than agas. A liquid can flow and does not have a specific shape like a solid. Instead, a liquid conforms to the shape of the container in which it is held. Although this is similar...
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The Fractional Distillation of Liquid Air An air separation unit is often called an oxygen or nitrogen generator, since its purpose is to extract one or both of these elements from the air. In the distillation process, the air is first passed through a filter that absorbs all the water vapor...
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Which of these has the highest vapor pressure in a sealed container at a temperature cool enough to produce a liquid? (a) CH_3CH_2OH (b) NCl_3 (c) H_2 (d) N_2 (e) CH_3OH. Which is denser at the same temperature and pressure: dry air or air saturated with ...
In its liquid state,natural gastakes up 1/600th of the space, meaning that natural gas is shrunk 600 times, making it much easier to ship and store when pipeline transport is not feasible. As world energy consumption increases, experts anticipate that the LNG trade will grow in importance....