题目:
下列反应的离子方程式中,书写正确的是( )
A.金属钠投入到蒸馏水中:Na+H2O=Na++OH-+H2↑
B.Fe跟稀盐酸反应:2Fe+6H+=2Fe3++3H2↑
C.铝粉投入到NaOH溶液中:2Al+2OH-=2AlO2-+H2↑
D.铜跟稀硝酸反应:3Cu+2NO3-+8H+=3Cu2++2NO↑+4H2O
答案:
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