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The ionic mobility for some ions in wate...

The ionic mobility for some ions in water at 298 K is given as following
`{:("ions" , "ionic mobility"),(K^(+) , 7.616x10^(-4)),(Ca^(+2), 12.33xx10x^(-4)),(Br^(-) , 8.09xx10^(-4)),(SO_(45)^(-2), 16.58xx10^(-4)):}`
The equivalent conductance of `CaSO_(4)` at infinite dilution is

A

279

B

`28.51xx10^(-4)`

C

`31.82xx10^(-4)`

D

306

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