题干

为了节省石油资源和有效地减少汽车尾气对环境的污染,我国正在逐步推广使用在汽油中加入适量乙醇作为汽车燃料(车用乙醇汽油).乙醇的化学式是C2H5OH,在物质分类中属于____化合物(填“无机”或“有机”),乙醇中碳元素和氢元素的质量比是____ ,乙醇燃烧时生成二氧化碳和水,写出该反应的化学方程式____

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有机物,4:1,C2H5OH+3O2 2CO2+3H2O

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