精品解析:2024年内蒙古赤峰市中考化学真题(解析版)
【淘宝搜索店铺:中小学教辅资源店微信:mlxt2022】化学可能用到的相对原子质量:一、选择题(每小题给出的选项中只有一个符合题意,请将该选项的序号在答题卡的对应位置上按要求涂黑。每小题2分,共28分)空气是地球上宝贵的自然资源,人类对空气的认识经历了漫长的研究和探索过程。完成下面小题。1.18世纪70年代,拉瓦锡通过定量实验证明了空气是混合物,其中约占空气体积的气体是A.B.C.D.2.随着科技的发展,空气中各成分的应用越来越广泛。下列用途主要利用物理性质的是A.氮气——充氮包装B.氧气——医疗急救C.稀有气体——激光技术D.二氧化碳——气体肥料3.如图是测定空气中氧气含量的改进实验装置(夹...
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