A) +6
B) - 7
C) +2
D) - 2
Correct Answer: A
Solution :
\[\overset{*\,\,}{\mathop{{{K}_{2}}C{{r}_{2}}{{O}_{7}}}}\,\] \[2+2x-2\times 7=0\]; \[2x-14+2=0\] \[2x=12\]; \[x=\frac{12}{2}=+6\].You need to login to perform this action.
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