精品解析:2022年甘肃省金昌市中考化学真题(解析版)
【中小学教辅资源店微信:mlxt2022】金昌市2022年初中毕业及高中阶段教育招生考试化学试卷考生注意:本试卷满分为100分,考试时间为120分钟。所有试题均在答题卡上作答,否则无效。可能用到的相对原子质量:H-1 C-12 O-16 C1-35.5 Ca-40一、选择题(本题包括25小题,每小题所列的四个选项,只有一个选项符合题目要求。1~10小题,每题1分,11~25小题,每题2分,共40分)1.空气中含量最多的气体是A.氮气B.氧气C.二氧化碳D.水蒸气【答案】A【解析】【详解】空气的成分按体积计算,大约是:氮气占78%、氧气占21%、稀有气体占0.94%、二氧化碳占0.03%、其它气...
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