（13）化学反应中的有关计算—2021-2022学年化学鲁教版（五四制）八年级全一册同步课
※题型：单选题※知识点：单选题※试题难度：中等<br>碳在氧气中完全燃烧,下列叙述正确的是( )<br>A.11g碳和11g氧气反应生成22g二氧化碳<br>B.3g碳和8g氧气反应生成11g二氧化碳<br>C.12g碳和11g氧气反应生成22g二氧化碳<br>D.8g碳和14g氧气反应生成22g二氧化碳<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/d21d1dec07224db1baaf6f7e54b0e48a/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br>略<br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列有关“<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/5/90AA1FDF37006A21EB184B323DD05CD4.png"><br>”的质量关系,不正确的是( )<br>A.若56gCO参加反应,则消耗<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/5/43916A0CBDACF639905BC5CD89370C97.png"><br>的质量一定是32g<br>B.若16g<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/5/43916A0CBDACF639905BC5CD89370C97.png"><br>参加反应,则生成<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/5/7002435560602C62060BA723DC55D86C.png"><br>的质量一定是44g<br>C.若有10g<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/5/7002435560602C62060BA723DC55D86C.png"><br>生成,则消耗的CO和<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/5/43916A0CBDACF639905BC5CD89370C97.png"><br>的质量总和一定是10g<br>D.若5gCO与2g<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/5/43916A0CBDACF639905BC5CD89370C97.png"><br>混合点燃,则生成的<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/5/7002435560602C62060BA723DC55D86C.png"><br>的质量一定是7g<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/7b21c950860a4b5b991529636b33c886/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/0c3b706394c346da9dae7aae8052f67b/C3EF4FCEFA342B3FE643518DAFEB5644.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>用3000t含氧化铁80%的赤铁矿,理论上可以炼出含铁96%的生铁的质量是【提示:反应的化学方程式为<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/19/C07F71ABFAE941C7B2488D1092F38763.png"><br>】( )<br>A.1166t B.1750t C.l810t D.1944t<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/788968b975a9464aa17748c7e1813dda/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/30fce97a7bbf4690b74a8295f2fe93e6/E6CC9B02D22B82F6E65DC2C42D265D46.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>某热电厂在冬季每天燃烧1000t含硫1%的煤,则冬季(100天)共向空气中排放二氧化硫的质量为( )<br>A.1000t B.2000t C.3000t D.4000t<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/66a6062ff7514cd8bfcafbb6c782c5e8/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/28a176abc9a941e2897c14fdbdd3826a/943C2E758FBB80420DFCE0E9475B8FAA.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>现有化学反应:<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/7/ECFABC329348BCF1F5647B7205199169.png"><br>,若将<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/7/2CA72034B324E25970D490AB9B8A53FA.png"><br>X和<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/7/8E60AF44B944D93A2DC05D2D8FA4B49B.png"><br>Y在一定条件下充分反应,生成物Z的质量( )<br>A.等于<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/7/21D2D8B894E64ADD5A188DD7218B81D4.png"><br>B.小于<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/7/21D2D8B894E64ADD5A188DD7218B81D4.png"><br>C.大于<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/7/21D2D8B894E64ADD5A188DD7218B81D4.png"><br>D.不大于<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/7/21D2D8B894E64ADD5A188DD7218B81D4.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/921db876204b4999ae4afafcc33c48e9/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/436e3dc38f3e4a86a316345857edb907/9F41F5EE22A7F737E45B409060A4262F.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>相同质量的下列物质完全分解后,产生氧气最多的是( )<br>A.过氧化氢 B.水 C.高锰酸钾 D.氧化汞<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/45eae55cc216446f920f0181b8db08b9/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/4234621610bc44d399ee0119c1e2ae12/641B037199E091ED7BBC0BCF1DEC8905.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>你认为下列说法正确的是( )<br>A.18g氢气和18g氧气反应,生成36g水<br>B.16g<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/26/CDE08DE09A11174D3A8CC4A13B43D038.png"><br>完全燃烧生成16g<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/26/3AB34B1B8224706C6E4369A324ED490A.png"><br>C.12g碳在50g氧气中充分燃烧,生成二氧化碳的质量为62g<br>D.利用化学方程式计算的依据是反应前后反应物和生成物的质量关系<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/61898d1d06fb4e049ffd4bfa2a98b2d3/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/f9e532da9e9b48ab906e264e34da472e/53D719976119C1EDDF63BD41FBAD2753.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>若氢气、氧气混合气体共20克,点燃后还有2克的气体剩余,则原混合气体中氢气和氧气的质量比( )<br>A.1:4 B.1:9 C.4:1或1:9 D.1:4或1:9<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/b266d5352fca41fc883acc560ddbfd4d/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/6127b07cce46485cb1f207e193b64c71/9AC46D66517EBE28953959EED470145F.png"><br><br>※题型：计算题※知识点：计算题※试题难度：中等<br>刘老师在批改作业时,看到一位同学这样的解题过程:求电解<br>3.6g<br>水可生成多少克氧气?<br>解:设可生成氧气的质量为<br>x<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/7/19/5345D9F3C1785799E759A05B6B450610.png"><br>请你指出其中的错误,并帮他改正过来。<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/53afac6a71d5447ab08e848bfa41e2e8/46DAE15132DED86360A3689B322D1625.png"><br>解析<br>略<br>※题型：计算题※知识点：计算题※试题难度：较易<br>某实验室中需要<br>1.6g<br>氧气进行实验。若用电解水的方法制取这些氧气,需要消耗多少克水?同时可生成多少克氢气?<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/2e589c51db3c4234a823e904350f400e/45C5E9E3C4F03E2B9BE9B4076586A0C0.png"><br>解析<br>略<br>※题型：计算题※知识点：计算题※试题难度：较易<br>一定质量的碳酸钙高温煅烧一段时间后生成二氧化碳<br>22g<br>,测得剩余固体中碳元素的质量分数为<br>6%<br>。计算<br>:<br>1.根据化学方程式计算,参加反应的碳酸钙的质量。____________<br>2.剩余固体的质量。____________<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/90098521f7264259a3ffd97fafaae016/E5FF99B291ACB8462C20A41B22DC32E7.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/46a15f0564994d99934f00adff8274d0/B44356368496417AD07FC6E9F933D521.png"><br><br>
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