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The following process has been used to o...

The following process has been used to obtain iodine from oil-field drines in California.
`NaI+AgNO_(3) rarr AgI+NaNO_(3)` …(1)
`2AgI+Fe rarr FeI_(2)+2Ag …(2)`
`2FeI_(2)+3Cl_(2) rarr 2FeCl_(3)+2I_(2)` …(3)
How many grams of `AgNO_(3)` are required in the first step for every `254 kg I_(2)` produced in the third step?

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The correct Answer is:
340 Kg
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