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Chemistry
Chemistry
Problem
In acidic solution,
C
r
2
O
7
2
−
\mathrm{Cr_2O_7^{2-}}
C
r
2
O
7
2
−
reacts with
F
e
2
+
\mathrm{Fe^{2+}}
F
e
2
+
to produce
C
r
3
+
\mathrm{Cr^{3+}}
C
r
3
+
and
F
e
3
+
\mathrm{Fe^{3+}}
F
e
3
+
. What is the coefficient of
F
e
2
+
\mathrm{Fe^{2+}}
F
e
2
+
when the overall equation is balanced using the smallest whole-number coefficients? a)
4
4
4
b)
6
6
6
c)
3
3
3
d)
5
5
5
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