赚现金
下列化学方程式书写正确的是
N a O H + H 2 S O 4 = N a 2 S O 4 + H 2 O
F e + 2 N a C l = 2 N a + F e C l 2
6 H C l + F e 2 O 3 = 3 H 2 O + 2 F e C l 3
3 K C l + A l N O 3 3 = 3 K N O 3 + A l C l 3
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