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The values of Lambdam^@ for NH4Cl, NaOH ...

The values of `Lambda_m^@` for `NH_4Cl`, NaOH and NaCl are 120.6, 248.2 and 136.4 `ohm^-1 cm^2 mol^-1` respectively. Calculate `Lambda_m^@` for `NH_4OH`.

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