广东省揭阳市揭西县2018届九年级下学期期中考试化学试卷
※题型：单选题※知识点：单选题※试题难度：容易<br>以下标志不会出现在化学实验室的是( )<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/6/8EA29E92AB299CFB5457A00AEEB2F10F.png"><br>A.易燃液体 B.腐蚀品 C.有毒品 D.禁止吸烟<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/8d0225a83f1940dba1aec214f245c5e6/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/37d7bf62ba4549ebaf08b2d76fd36c2f/679F91E43E0C8F46D0B22A2031E5E8A7.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>从化学的角度分析以下生活案例,不合理的是( )<br>A.在室内烧炭取暖时,放置一盆水可防止一氧化碳中毒<br>B.油锅着火,可用锅盖盖灭<br>C.将木材架空进行燃烧,可增大与氧气的接触面积<br>D.进入人群密集的地方或地窖内都要注意通风换气<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2020/9574f19659004a5cba057cadd91f46e7/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2020/f10f122620064ad8ace0e2ba5cf68734/530731F8CEB410804B0DD8317C403FFC.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>构成物质的微粒有分子、原子和离子,有关三种粒子的说法,错误的是( )<br>A.同种原子可以构成不同的分子<br>B.原子就是最小的粒子<br>C.原子可以通过得到或失去电子变为离<br>D.分子、原子和离子都在不断地运动<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2020/4af8a00b3094452c8586dc76cda885ca/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2020/58a5a2c0a2ba4966a9966eeea878fd3d/7976C28C384FD9EC7F7685C0A41CCC02.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>以下实验操作正确的是( )<br>A.<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/6/6D88EC0CB3A5226373FE275BAE3E2811.png"><br>溶解氯化钠<br>B.<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/6/4A2FD8BAEFCCF533EABC1271603D2F3C.png"><br>处理废液<br>C.<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/6/EDD25BB9D1C3A42CA2A43B257BAD33BD.png"><br>保存氢气<br>D.<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/6/EF6D2885078A26E8F8151372A47A718A.png"><br>取用液体<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/658b7eb78dfc45cda27e7581c1f30eb4/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/6110d5b622ca4ceea3a67cde7e137b84/BE7DBA3BDB2A42EAC2EAADEF60733BD9.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>下列物质的归类错误的是( )<br>A.氧化钠、氧化铝—金属氧化物<br>B.自来水、石油、蒸馏水—混合物<br>C.生铁、钢、青铜—合金<br>D.<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/6/BDF900345AF09A3015F45B2669FF3895.png"><br>、CO、C—还原剂<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/cfec519aa7dd4a54b5fb99c804ff59d2/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/3228db9a40754eeca2c8983b506b2505/EEBAF89F4AE52AD0567B79A112524035.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>推理分析是学习化学的一种方法,以下推理分析正确的是( )<br>A.降温能使KNO<sub>3</sub>不饱和溶液变饱和,所以不饱和溶液通过降温一定能变为饱和溶液<br>B.含氢的物质燃烧能生成H<sub>2</sub>O,所以燃烧能生成H<sub>2</sub>O的物质一定含氢元素<br>C.在同一化合物中金属元素显正价,所以非金属元素一定全都显负价<br>D.化学反应常常伴随着热量变化--有热量释放的变化一定是化学反应<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2018/606e4075a6a94029a6191e5cc69c6857/76900E09FAB5EBA344B8EA84E844FF07.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>下列区别两种不同物质的方法错误的是( )<br>A.用观察颜色深浅区别硫酸铜溶液的浓与稀<br>B.用蒸发的方法区别蒸馏水与食盐水<br>C.用燃着的木条区别氮气与<img src="https://picture2.zhihuicn.com/testImage/2/2020/5/15/7002435560602C62060BA723DC55D86C.png"><br>D.用石蕊溶液区别CO与<img src="https://picture2.zhihuicn.com/testImage/2/2020/5/15/7002435560602C62060BA723DC55D86C.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2020/220bfecaba284a85b05f6891c108842a/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2020/cab45dc1afed411aa052e36b4c6f3d95/80A2A9DCD8BFC372C65246A4F81FDAC3.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>下列关于“物质---用途---性质”的说法不正确的是( )<br>A.金刚石----玻璃刀----硬度大<br>B.稀有气体---电光源----通电时能发出不同颜色的光<br>C.铜----铜质火锅----优良的导电性<br>D.干冰----人工降雨----升华时吸收大量的热<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2020/94c83556ffb947c2aace788bd2b44d31/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2020/28279b54d3334420896c2395cc02a5db/70875C20FA093A040D1A9CD6A04B478C.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>以下实验不能取得成功或分析错误的是( )<br><tbody><br>A<br>B<br>C<br>D<br><img src="https://picture2.zhihuicn.com/testImage/2/2018/7/25/259128980224E91DD6D9562413B52755.png"><br><img src="https://picture2.zhihuicn.com/testImage/2/2018/7/25/5ADD07F1C6AFB068A824EBE81BFAF156.png"><br><img src="https://picture2.zhihuicn.com/testImage/2/2018/7/25/839133C891AEE9F0BF03CEE9FCCB6D12.png"><br><img src="https://picture2.zhihuicn.com/testImage/2/2018/7/25/EF36D4D99F36E877B372567DC3C41321.png"><br>制取氢气<br>说明石蜡含碳元素<br>说明石墨具有导电性<br>推测蛋壳中可能有碳酸钙<br></tbody><br>A.A B.B C.C D.D<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2018/aab4331f768a4cdf9e6e1c2524690b61/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2018/9dd122e18bf54ff19336d9823a8657fc/B8F524CC78DA009F2872A04F34676445.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>工业上用下列反应制取金属Hg:<img src="https://picture2.zhihuicn.com/testImage/2/2020/5/15/517DFE19A5B1CF7E74AE0B7010EE6883.png"><br>,该反应中X的化学式( )<br>A.S<br>B.CaS<br>C.<img src="https://picture2.zhihuicn.com/testImage/2/2020/5/15/F6CFD688F488964D4928A265FEAE48CC.png"><br>D.<img src="https://picture2.zhihuicn.com/testImage/2/2020/5/15/CE09F66E404C36FDAA51FCEC7E2D55BE.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2020/a64bb266103d4d8694ccd0c221689ee5/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2020/546816bc4d7e4af48488fcdbc787e6a6/86D4114467DC133CDF5E9B9D71DD9DAE.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>下图为碘在元素周期表中的相关信息及原子结构示意图,判断下列说法正确的是( )<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/6/17E0DCC08CC1AF3B500D4A528E519296.png"><br>A.x=8<br>B.碘离子的核外电子数为53<br>C.碘的相对原子质量为126.9<br>D.碘原子的符号可用<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/6/7436A5C2F3EFDA5C667C0493A68782A6.png"><br>表示<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/164cef98861041c98bb0c2ff32dcea65/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/3ded744294e14c518d5bd01b208d92e0/3B31F6B3D34A6E1F481CE51F25A714E2.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列除杂质(括号内为杂质)的方法错误的是( )<br>A.<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/6/3AB34B1B8224706C6E4369A324ED490A.png"><br>(CO)通过灼热的氧化铜<br>B.<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/6/63116A891207AED4C20441DF9C31E3A7.png"><br>溶液<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/6/D5585DD89CC73674074AC6C8A053F7E5.png"><br>加适量Mg、过滤<br>C.CuO(C)在空气中充分灼烧<br>D.<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/6/D240B317CC76FB83C54D22F76E6C97EA.png"><br>高温煅烧<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/a936e79c0b5146f1827693f12a30aee7/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/bd95e0b988584a6f8e07b774be2eddcb/011A980C13403E245A32E2B823BC5C6D.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较难<br>下图为三种物质的溶解度曲线,以下说法正确的是( )<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/6/62F2A1EA2046AF0EFAF2F29173517606.png"><br>A.<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/6/D6ABB2428D0A114FFECCB9D56E06507E.png"><br>的溶解度随温度的升高而不断增大<br>B.<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/6/97DE7627ECA82C404E1EFD3560FA9B7B.png"><br>时,KCl溶液的溶质质量分数都小于20%<br>C.将<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/6/32950889DA083F8FEB4B456B77CE675B.png"><br>的三种物质的饱和溶液降温至<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/6/97DE7627ECA82C404E1EFD3560FA9B7B.png"><br>,所得溶液溶质质量分数的大小关系为<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/6/05E26A25D4133F8D79B7573D7A4E5E45.png"><br>D.在<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/6/4180F5E50657C019753A36073FA2E283.png"><br>范围内,<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/6/D6ABB2428D0A114FFECCB9D56E06507E.png"><br>的饱和溶液中含有少量KCl,应通过蒸发结晶来提纯<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/6/D6ABB2428D0A114FFECCB9D56E06507E.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/06c4476ec73049618e598e4de34f450a/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/89bfedbab13c4892ae812f156f4e73ec/A591DEF54B9BF52F993D585B4DE5FAE7.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列对应曲线正确的是( )<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/6/C838DB3E6EB87A6C2FE1EE865EB56115.png"><br>A.在水中不断加入氯化钠<br>B.某温度下,将饱和的硝酸钾溶液恒温蒸发溶剂<br>C.加热氯酸钾和二氧化锰<br>D.等质量、等质量分数的双氧水完全分解<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/a1ed7b12a5da4568a5a76b38adb2cda3/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/96e685c000b14af28b8070bc81f8223c/E744BF01407D5F2030D6274C7D5150F8.png"><br><br>※题型：填空题※知识点：填空题※试题难度：较易<br>写出下列对应的化学符号:<br>1.2个钠离子.2.标出氧化铝中铝的化合价.3.植物光合作用吸收的气体.4.海洋中最多的物质.<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2020/c59ae90c94d14476a43bee7adb8b91d2/C21351BECA44A5FC5ED97B19E5DAF2E8.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2020/8f34010d88c4492b9f21209267d0af65/920157534A52FF1078EC26153E0DDF5E.png"><br><br>※题型：问答题※知识点：问答题※试题难度：中等<br>按要求回答以下问题<br>1.煤的燃烧不会直接导致的环境问题是______(填字母).A.酸雨 B.温室效应增强 C.臭氧层破坏 D.可吸入颗粒物增多2.将如下三种物质(A.食盐B.花生油C.泥沙)分别加入水中,能形成溶液的是_____(填字母),再分别加入洗洁精振荡,能出现乳化现象的是________(填字母)。3.煤炉越扇越旺,说明燃料充分燃烧的条件之一是____________________________<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/a0894d592a7644e08b25ab5436fb1010/55752F9D7DE0E2EA7DF33F2AF6D24485.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/0ce026d6bcdc497cb4bc485dc89bb41f/A9BCB5C1EA821B0E8979FA1A7305248F.png"><br><br>※题型：问答题※知识点：问答题※试题难度：较易<br>微观示意图可以形象的表示物质发生的微观变化<br>1.请在下图第一、三方框中把硫化氢在氧气中燃烧(<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/6/42EC1FB14A46CFC60838C641BB56AA0F.png"><br>)的微观示意图补画完整。______________<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/6/78D1DAD1F3B44734DE5AA851080B563C.png"><br>2.在上述化学反应中,化合价不发生改变的元素是_________(填符号)<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/37c5dfa03f394781aa6595db9ecf8d0d/FC43EA37434CEDDAFA31FE00BCBD1201.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/95367537e2c7478faf19e8182cf11ca8/9C29C92641520650F229D1988C886EB4.png"><br><br>※题型：填空题※知识点：填空题※试题难度：中等<br>根据下图回答问题<br><img src="https://picture2.zhihuicn.com/testImage/2/2020/5/15/24A4F051DC0C1CE56E06AB1A57527519.png"><br>1.小孩血铅超标中的“铅”指的是(填原子、元素或单质),有人认为图一中小孩的疑虑是没有必要的,你的解释是. 2.观察图二火灾场景,提出一条合理的逃生建议.3.图三净水器宣称“净化的水不会再产生水垢”,该广告是否科学并做简要分析。<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2020/9ea34f5241724bfb8174fc8c9b23aff2/66C39F0ABCBD85744BF61A1BF1F2726B.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2020/1f7ba528c6584a3cbbc5f804522ab0e4/07277310E60F3B895F66D6FCC288A0DF.png"><br><br>※题型：实验题※知识点：实验题※试题难度：中等<br>实验室中有一桶含<br><img src="https://picture2.zhihuicn.com/testImage/2/2020/5/15/FD42603B597B8C470CC7B191E356F4D2.png"><br>和<br><img src="https://picture2.zhihuicn.com/testImage/2/2020/5/15/5B8A0DA17C2201985CAAC04144C22122.png"><br>的废液。他们想从中回收铜并制取<br>“还原铁粉”<br>主要步骤如图所示。<br>查阅资料<br>:<br><img src="https://picture2.zhihuicn.com/testImage/2/2020/5/15/DC814028E8588F2C51FF60A71DCD124D.png"><br><img src="https://picture2.zhihuicn.com/testImage/2/2020/5/15/367CF299F8174D2EEDBEA80B797E4FFC.png"><br><img src="https://picture2.zhihuicn.com/testImage/2/2020/5/15/43D18565E1635A4766B5537D4BCCA4B7.png"><br>1.金属X为,步骤I加入过量的金属X后发生了个化学反应。2.金属A中的成分有,步骤III可采用最简单的方法为。3.在此流程中一定需要用到过滤操作的步骤是(填Ⅰ~Ⅲ)。4.<img src="https://picture2.zhihuicn.com/testImage/2/2020/5/15/B8EF93E0C6A151B731666187AB1B56FC.png"><br>沉淀隔绝空气进行“焙烧”后,加入焦炭才能制得铁粉,写出加入焦炭后发生反应的化学方程式。<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2020/262a3bfb43c249fa85367546a332413b/02CB0016A8C0F2E28FD2860C55ED4EB7.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2020/22e5fdaadf05434383dc592a3e8d3627/7AD6F65399F2ACAC640DF616E57D5B50.png"><br><br>※题型：实验题※知识点：实验题※试题难度：中等<br>下图是实验室制取气体的仪器,按要求回答问题:<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/3/6/88627803A86882FDC0B488738E9208CA.png"><br>1.仪器G的名称是________,可用于加热固体制取<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/6/43916A0CBDACF639905BC5CD89370C97.png"><br>的发生装置为______(填字母),该装置中发生反应的化学方程式为_________________.<br>2.若用37.5%的过氧化氢溶液制取<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/6/43916A0CBDACF639905BC5CD89370C97.png"><br>,最好选用DG组合成发生装置,理由是_________,若要将上述溶液稀释成60g、5%的溶液,则需要原溶液的质量为_______g.3.下图J装置可用于实验室制取<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/6/7002435560602C62060BA723DC55D86C.png"><br>,检验该装置气密性的方法:从长玻璃管口加入一定量的水,然后用弹簧夹夹紧胶皮管,将左侧长玻璃管向上提起一段后静置,若观察到______________,则气密性良好。该装置在操作上具有的优点是_________________,若从B~H中选择__________(填字母)进行组合,也能具有同样的优点。<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/6/671037EB5472724D770CF77ED78E4F21.png"><br> 4.上图I装置的Y型试管内装有制取<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/6/7002435560602C62060BA723DC55D86C.png"><br>的药品,反应的化学方程式为________,可通过______________________的操作来制得<img src="https://picture2.zhihuicn.com/testImage/2/2021/3/6/7002435560602C62060BA723DC55D86C.png"><br>,该装置______(填“有”或“没有”)J装置的操作优点。<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/98840eda701641ebb1360daeef4c5403/3A075D639F0F503230FEDA7C239022E4.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/4ec06bd64aed4f19b483ba741fe6db36/07778A614333D66B6FAA97343657EEB1.png"><br><br>※题型：实验题※知识点：实验题※试题难度：中等<br>某同学进行下图实验<br>充分反应后<br>将试管<br>①②<br>内的物质倒入同一烧杯中混合,再次充分反应后过滤<br>结果得到滤渣<br>A<br>和无色滤液<br>B<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/3/6/55F9287E66314433C09F22EEEB7DB76D.png"><br>(1)<br>试管<br>①<br>中反应的化学方程式为:<br>_____________________<br>。试管<br>②<br>中观察到的现象是:有红色固体析出,溶液<br>________________<br>(2)<br>无色滤液<br>B<br>中含有的溶质为<br>___________<br>(<br>填化学式<br>)<br>(3)<br>设计实验探究滤渣<br>A<br>的成分<br>(提出问题)滤渣<br>A<br>的成分是什么?<br>(查阅资料)银、铜、铁、铝四种金属中,只有铝能与氢氧化钠溶液反应,反应方程式为:<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/3/6/383C01928E3EC37510B706D8D523424C.png"><br>(提出猜想)滤渣<br>A<br>的成分为:<br>猜想<br>一<br>:银、铜<br>猜想二:银、铜、铁<br>猜想三:银、铜、铁、<br>______.<br>(分析思考)猜想<br>一<br>______(<br>填<br>“<br>是<br>”<br>或<br>“<br>否<br>”)<br>合理,理由是<br>__________________<br>(进行实验)区两份滤渣<br>A<br>样品进行以下实验,请填写下列空白。<br><tbody><br>样品<br>加入试剂<br>实验现象<br>第一份样品<br>足量稀盐酸<br>产生气泡,固体部分溶解,溶液变为<br>___________<br>第二份样品<br>足量氢氧化钠溶液<br>现象<br>b<br></tbody><br>(做出判断)<br>①<br>如果现象<br>b<br>为<br>“<br>产生气泡,固体部分溶解<br>”<br>,则猜想<br>_____<br>成立;<br>②<br>如果现象<br>b<br>为<br>“______________________”<br>,则猜想<br>_____<br>成立;<br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/2a4d45a4bba848feabbe2dc5564b8e5d/222D784A29B440864B8F65EFF3ACC013.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/26baf3817b45428abfd870e840923a18/1D0BC1E6434C22FA265C7D1ED7C5FAB2.png"><br><br>※题型：计算题※知识点：计算题※试题难度：中等<br>下列标签为哈药集团生产的<br>“<br>新盖中盖牌<br>”<br>高钙片的部分文字,请回答:<br><img src="https://picture2.zhihuicn.com/testImage/2/2020/5/15/7E8A31D05AFE72D7D7C678F74D36B232.png"><br>1.碳酸钙是由______种元素组成;2.碳酸钙中钙元素的质量分数为______;3.若要补钙1g,则要服用钙片片。4.每片高钙片中碳酸钙的质量分数为_______;<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2020/cce5ce187e364d31b086869727266b18/F42BF1566D0AF7FD0067C988E4C8F566.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2020/9e053fbc6cc249f8a47c8f5d88348509/B7D1F4EB84EBE51222B14757F69A7680.png"><br><br>
页:
[1]