已知浓硝酸是一种易挥发的强酸,见光易分解,其分解的反应方程式为:4HNO3 △ . 2H2O+4NO2↑+X↑.根据

2025年04月07日 03:34
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网友(1):

(1)硝酸是一种易挥发的强酸,见光易分解,表明硝酸具有酸性、不稳定性、见光易分解;
(2)水H2O中氢、氧元素的质量比=(1×2):16=1:8;
(3)由反应4HNO3

  △  
 
2H2O+4NO2↑+X↑,反应前4HNO3中含H、N、O原子个数分别为4、4、12,而反应后2H2O、4NO2中共含有H、N、O原子个数分别为4、4、10,根据反应前后原子种类、个数不变,可判断X分子由2个O原子构成,则物质X的化学式为O2
(4)反应物为一氧化碳和一氧化氮,生成物为氮气和二氧化碳,再配平,条件是催化剂;
化学方程式为:4CO+2NO2
 催化剂 
 
4CO2+N2
故答案为:(1)见光容易分解(或酸性、不稳定性);
(2)1:8;
(3)O2
(4)2CO+2NO
 催化剂 
 
2CO2+N2

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