（17）利用化学方程式的简单计算—2021-2022学年化学人教版九年级上册同步课时作业
※题型：单选题※知识点：单选题※试题难度：中等<br>化学实验中常常出现“1+1=2”或“1+1≠2”的有趣现象。下列符合“1+1=2”的事实是( )<br>A.常温下,1L水与1L酒精混合后的体积等于2L<br>B.在点燃的条件下,1g木炭在1g氧气中完全燃烧后生成2g二氧化碳<br>C.在点燃的条件下,1g硫粉在1g氧气中完全燃烧后生成2g二氧化硫<br>D.在点燃的条件下,1g红磷在1g氧气中完全燃烧后生成2g五氧化二磷<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/6af97293df884d99a349738f41ba9181/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br>略<br>※题型：单选题※知识点：单选题※试题难度：较易<br>点燃1g氢气,使其充分燃烧,则生成水的质量为( )<br>A.2g B.8g C.9g D.10g<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2019/dc7bf6bdd7df4fc4a5e766f455d58060/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2019/fc7f958d865f45469da5774aa661c607/9CE8487DE5D7F350DCE48054ADEB7476.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>相同质量的<img src="https://picture2.zhihuicn.com/testImage/2/2019/8/22/F03A4D6C231442FF5269F62F6200D7CE.png"><br>、<img src="https://picture2.zhihuicn.com/testImage/2/2019/8/22/0B326EB7403609569D06BE6DE17BB14A.png"><br>和<img src="https://picture2.zhihuicn.com/testImage/2/2019/8/22/3256B99D406CF944736F3DF394A52EF1.png"><br>完全燃烧需要氧气的质量( )<br>A.<img src="https://picture2.zhihuicn.com/testImage/2/2019/8/22/3256B99D406CF944736F3DF394A52EF1.png"><br>最多,<img src="https://picture2.zhihuicn.com/testImage/2/2019/8/22/F03A4D6C231442FF5269F62F6200D7CE.png"><br>最少<br>B.<img src="https://picture2.zhihuicn.com/testImage/2/2019/8/22/F03A4D6C231442FF5269F62F6200D7CE.png"><br>最多,<img src="https://picture2.zhihuicn.com/testImage/2/2019/8/22/0B326EB7403609569D06BE6DE17BB14A.png"><br>最少<br>C.<img src="https://picture2.zhihuicn.com/testImage/2/2019/8/22/F03A4D6C231442FF5269F62F6200D7CE.png"><br>最多,<img src="https://picture2.zhihuicn.com/testImage/2/2019/8/22/3256B99D406CF944736F3DF394A52EF1.png"><br>最少<br>D.<img src="https://picture2.zhihuicn.com/testImage/2/2019/8/22/0B326EB7403609569D06BE6DE17BB14A.png"><br>最多,<img src="https://picture2.zhihuicn.com/testImage/2/2019/8/22/3256B99D406CF944736F3DF394A52EF1.png"><br>最少<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2019/73c72cd71b3143d9ad614c4e60e1a5ae/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2019/c32241f177db46bcbe441a14e7988c39/A111844B2A90C2F7397721296D09289B.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>工业炼铁可利用一氧化碳与氧化铁反应。若要生产含铁97%的生铁231t,需含氧化铁80%的赤铁矿石的质量最接近( )<br>A.224t B.280t C.320t D.400t<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2020/976df9fc982743a58870ecae90b4ae46/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2020/86dda618733a4730a8211696e9b9dde7/EB2452ECFC5CB12F4E5E544FA0BD195F.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>工业上,煅烧石灰石(主要成分是<img src="https://picture2.zhihuicn.com/testImage/2/2020/11/6/C33BDE800D867632B103C25FB2DA0A2F.png"><br>)可制得生石灰(CaO)和二氧化碳。现有氧化钙和碳酸钙的固体混合物156g,高温煅烧至完全反应,得到固体质量112g,则原固体混合物中钙元素的质量为( )<br>A.40g B.60g C.80g D.56g<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2020/efcb519681e54da5be1cf09e2ab60fd4/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2020/95dddd249c344154beb239f251764311/AEC2A3CDF7C61B20D92765B4810C0AF5.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>某过氧化氢和水的混合物中,氢元素与氧元素的质量比为<img src="https://picture2.zhihuicn.com/testImage/2/2020/7/7/D8584D218DB709786F6CFAE194F800C6.png"><br>,<img src="https://picture2.zhihuicn.com/testImage/2/2020/7/7/0798219DFC0F346A0FFAC1D523E7EEF6.png"><br>克这样的混合物加入少量二氧化锰完全分解后产生氧气的质量是( )<br>A.<img src="https://picture2.zhihuicn.com/testImage/2/2020/7/7/87931AD11F16A098452755513B68F251.png"><br>B.<img src="https://picture2.zhihuicn.com/testImage/2/2020/7/7/DCCDAE72C35821AF25426CD440426159.png"><br>C.<img src="https://picture2.zhihuicn.com/testImage/2/2020/7/7/77F6F40CFD9D7DB192CA0026CB51914E.png"><br>D.<img src="https://picture2.zhihuicn.com/testImage/2/2020/7/7/2F06D8AC10C93EA3B2587C91CFB1ED48.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2020/49f51984c2f143359a01b527379f3326/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2020/8c6cd290f7b6483682bd5ebbf575f60e/5A10CE1A790AE8B43A3385E5703696D7.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>电解水时常在水中加入少量的硫酸以增加水的导电性。若用含水92%的稀硫酸25g,通电进行电解,一段时间后稀硫酸中含水为90%,则发生电解的水的质量为( )<br>A.2g B.4g C.5g D.2.5g<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2020/69d4822ce22b490089dd2527cd877e8b/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2020/d9f513d16f874fc19511e23631218afd/4382698FCB40BF943222F39E1F138AF4.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>实验室用氯酸钾和二氧化锰的混合物制取氧气,某次实验中固体的质量变化如下<br><img src="https://picture2.zhihuicn.com/testImage/2/2020/10/9/022BDBD33D75F69DA0CC44472C75005D.png"><br>试计算<br>1.生成氧气的质量是多少?_______2.生成的氯化钾是多少?_______3.参加反应的氯酸钾质量是多少?_______<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2020/842d0d19017d4a629a92e3ce0d1bb9c6/E1C0557B5FD8C0F35305F42307991C8D.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2020/ad8d4cad9bf14f388e326c2ad143b78f/ECDB7E9D127AB05B83DFE9B35976972A.png"><br><br>
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