（15）质量守恒定律—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：较易<br>在催化剂并加热的条件下,氨气和氧气能发生化学反应,其反应的化学方程式为<img src="https://picture2.zhihuicn.com/testImage/2/2015/9/10/EC6BCB97140080AF1088AFF893A02482.png"><br>,则X的化学式是( )<br>A.<img src="https://picture2.zhihuicn.com/testImage/2/2015/9/10/FFADA5F19AA4D4614F9C6B59C27E9FFB.png"><br>B.<img src="https://picture2.zhihuicn.com/testImage/2/2015/9/10/4CBBD5841EDF0C30176C944BE9CBDD93.png"><br>C.<img src="https://picture2.zhihuicn.com/testImage/2/2015/9/10/DFF4AB3F63B2FA098048171D8652A30B.png"><br>D.<img src="https://picture2.zhihuicn.com/testImage/2/2015/9/10/C767696CB25FABAD622C476A2887E32E.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2015/438e865fbef0450381186df14828a384/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2015/665c14d66eb14edb81fa1472c5ca6768/34D2A1D5A5FC43F03866851883DB9575.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br><img src="https://picture2.zhihuicn.com/testImage/2/2021/7/23/6974E38CB2FF623D3608A8ED4A13F360.png"><br>(高氯酸铵)可用作火箭推进剂,当它发生分解反应时,不可能生成的物质是( )<br>A.<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/23/3AB34B1B8224706C6E4369A324ED490A.png"><br>B.<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/23/23884E77D0362C4DB78B4D7304596665.png"><br>C.HCl<br>D.<img src="https://picture2.zhihuicn.com/testImage/2/2021/7/23/2D6BB1E99EC9712F9ABE69638AB4339D.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/b28be20ea2e54e57b88cb76eed445e95/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/06ea494314b8432b93d2f658209b1f2c/7D77F405A6847E3C53026BD5E25FF543.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列说法中正确的是( )<br>A.根据质量守恒定律,1L氢气和1L氧气反应能生成2L水<br>B.只有固体、液体间的反应遵循质量守恒定律,如果有气体参加,就不遵循了<br>C.镁条在空气中燃烧,生成物的总质量比原来镁条的质量大<br>D.水结冰后质量没有改变,由此说明化学变化遵循质量守恒定律<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2020/51c21ce8e4ca4d7887c8f2ef1161670c/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2020/7dc09319d2894d1f98387726f3daea8e/F702656EF5FBB498D4179E9EA0ED7B44.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>在一定条件下,一密闭容器内发生某反应,测得反应前后各物质的质量如表所示。下列说法不正确的是( )<br><tbody><br>物质<br>a<br>b<br>c<br>d<br>反应前的质量/g<br>40<br>5<br>16<br>15<br>反应后的质量/g<br>x<br>5<br>30<br>26<br></tbody><br>A.b可能是催化剂<br>B.<br>x<br>的值等于15<br>C.该反应是分解反应<br>D.参加反应的c与d的质量比为15:13<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/c7a385cedf25443089e8dd563350dcf6/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/e47a216ce2a443d6b1c092bb810f72e9/21BF53B1ED77480C448EB5BB8BEB9164.png"><br><br>
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