在25℃时,电池Pb(Hg)(a1)|Pb(NO3)2(aq)|Pb(Hg)(a2)中a1a2,则其电动势E ()A、0B、0C、=0D、无法比较
在25℃时,电池Pb(Hg)(a1)|Pb(NO3)2(aq)|Pb(Hg)(a2)中a1>a2,则其电动势E ()
- A、<0
- B、>0
- C、=0
- D、无法比较
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