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【单选题】
反应 2MnO 4 - (aq)+5S 2- (aq)+16H + = 2Mn 2+ (aq) +5S(s) +8H 2 O(l),在标准状态下电池电动势为2.00V,当某浓度是电池电动势为2.73,该反应的△ r G m 为A.
5*2.00F
B.
-5*2.00F
C.
10*2.73F
D.
-10*2.73F
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A.
is assigned
B.
will be assigned
C.
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D.
has been assigned
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A.
had been unemployed
B.
was unemployed
C.
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D.
has unemployed
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A.
will be
B.
be
C.
has been
D.
is
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A.
because of
B.
because
C.
since
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as
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