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Calculate the mass of (NH(4))(2)SO(4) in...

Calculate the mass of `(NH_(4))_(2)SO_(4)` in g which must be added to 500 mL of `0.2 M NH_(3)` to yield a solution of pH = 9.35 `K_(b)` for `NH_(3) = 4.7`.

A

5.248 g

B

7.92 g

C

6.973 g

D

9.25 g

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A
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