亚洲激情+欧美激情,无码任你躁久久久久久,我的极品美女老婆,性欧美牲交在线视频,亚洲av高清在线一区二区三区

電子課本網(wǎng) › 第64頁

第64頁

信息發(fā)布者：
B
C
C 
C
D
$\text {CO}_{2}＋4\text {H}_{2}\xlongequal[ ]{ }\text {CH}_{4}＋2\text {H}_{2}\text {O}_{}$
分子是由原子構(gòu)成(合理即可)
$\text {2H}_2\text {O}\xlongequal[\ \ \ \ \ \ ]{通電}2\text {H}_2↑+\text {O}_2↑$
$\text {2KMnO}_4\xlongequal[\ \ \ \ \ \ ]{△}\text {K}_2\text {MnO}_4+\text {MnO}_2+\text {O}_2↑$
$\text {2Cu+O}_2\xlongequal[\ \ \ \ \ \ ]{△}2\text {CuO}$
$\text {2H}_2\text {O}_2\xlongequal[\ \ \ \ \ \ ]{\text {MnO}_2}2\text {H}_2\text {O}+\text {O}_2↑$
? $\text {CO}_2+\text {Ca(OH)}_2\xlongequal[\ \ \ \ \ \ ]{\ \ \ \ \ \ }\text {CaCO}_3↓+\text {H}_2\text {O}$
$\text {CaCO}_3+2\text {HCl}\xlongequal[\ \ \ \ \ \ ]{\ \ \ \ \ \ }\text {CaCl}_2+\text {H}_2\text {O}+\text {CO}_2↑$
$\text {2KClO}_3\xlongequal[△ ]{\text {MnO}_2}\text {2KCl+3O}_2↑$
$4\text {Al}+3\text {O}_2\xlongequal[\ \ \ \ \ \ ]{}2\text {Al}_2\text {O}_3$
上一頁 下一頁