...反应的文字表达式和反应的符号表达式(1)硫在空气中燃烧:___百度知...
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发布时间：2024-10-22 06:45
共2个回答
热心网友
时间：4分钟前
硫在空气中燃烧有刺激性气味气体生成，反应的文字表达式：硫+氧气=点燃=二氧化硫。化学方程表示：S+O₂=点燃=SO₂。
通常单质硫是黄色的晶体，又称作硫磺。硫单质的同素异形体有很多种，有斜方硫、单斜硫和弹性硫等。硫元素在自然界中通常以硫化物、硫酸盐或单质的形式存在。硫单质难溶于水，微溶于乙醇，易溶于二硫化碳。
硫是人体内蛋白质的重要组成元素，对人的生命活动具有重要意义。硫主要用于肥料、火药、润滑剂、杀虫剂和抗真菌剂生产。
扩展资料：
硫不溶于水但溶于二硫化碳。导热性和导电性都差。性松脆，不溶于水。无定形硫主要有弹性硫，是由熔态硫迅速倾倒在冰水中所得。不稳定，可转变为晶状硫。晶状硫能溶于有机溶剂如二硫化碳（而弹性硫只能部分溶解）、四氯化碳、甲苯和苯。
除0价外常见化合价有3种，为-2(硫化氢)、+4(亚硫酸钠)和+6(硫酸)价；而+2价(甲醛次硫酸氢钠)则并不常见。第一电离能10.360电子伏特。结晶形硫不溶于水，稍溶于乙醇和乙醚，溶于二硫化碳、四氯化碳、甲苯和苯。可转变为晶状硫（正交硫），正交硫是室温下唯一稳定的硫的存在形式。原子半径：88pm。
参考资料来源：百度百科-硫
热心网友
时间：3分钟前
（1）硫在空气中燃烧有刺激性气味气体生成，反应的文字表达式和化学方程式为硫+氧气点燃二氧化硫和S+O2 点燃 . SO2．
（2）碳在空气中燃烧生成的气体能使澄清的石灰水变浑浊，反应的文字表达式和化学方程式为碳+氧气点燃二氧化碳和C+O2 点燃 . CO2．
（3）铁在氧气中燃烧生成四氧化三铁，反应的文字表达式和化学方程式为铁+氧气点燃四氧化三铁和3Fe+2O2 点燃 . Fe3O4．
（4）镁在空气中燃烧生成氧化镁，反应的文字表达式和化学方程式为镁+氧气点燃氧化镁和2Mg+O2 点燃 . 2MgO．
（5）铜片加热氧化铜，反应的文字表达式和化学方程式为铜+氧气加热氧化铜和2Cu+O2 △ . 2CuO．
故答案为：（1）硫+氧气本回答被提问者采纳已赞过已踩过你对这个回答的评价是？评论收起推荐律师服务：若未解决您的问题，请您详细描述您的问题，通过百度律临进行免费专业咨询 ._1uevpeq{zoom:1;background-color:#fff;border:0;margin-bottom:10px;padding:30px 0 20px 42px;position:relative}._1uevpeq.ec-1841{padding:20px 0}._1uevpeq.ec-2246{padding:20px 0 10px}.ec-1841 .y7we4hu{font-size:16px;margin-bottom:-5px}.y7we4hu{color:#7a8f9a;height:25px;line-height:25px;overflow:hidden;position:relative}.y7we4hu h2{margin:0;padding:0}.y7we4hu:after{clear:both;content:" ";display:block;height:0;visibility:hidden}a.tycfu7u{color:#666;float:right;font-size:12px;margin-left:8px;text-decoration:none}.hhhv6ex{color:#666;font-size:13px;line-height:normal;line-height:20px;margin-top:10px}.vnsdjzp{margin-top:15px;position:relative}.vnsdjzp h3{font-weight:400;padding:0}.vnsdjzp a{text-decoration:none}.vnsdjzp em{color:#d81419;font-style:normal}.ec-2246 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