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2 g of brass containing Cu and Zn only r...

2 g of brass containing Cu and Zn only reacts with 3M `HNO_(3)` solution. Following are the reactions taking place `Cu(s) + HNO_(3) (aq) to Cu^(2+) (aq) +NO_(2)(g) + H_(2)O(I)`
`Zn(s) + H^(+)(aq) + NO_(3)^(-)(aq) to NH_(4)^(+) + Zn^(2+)(aq) + H_(2)O(l)`
The liberated `NO_(2)(g)` was found to be 1.04 L at `25^(@)`C and 1 atm `[Cu=63.5 , Zn=65.4]`
The percentage by mass of Cu in brass was

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The correct Answer is:
`Cu = 90%, Zn = 10%, 9.558` mL
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