_ m ^ for NH ₄ Cl , NaOH and NaCl are 130,248 and 126.5 ⁻¹ ~cm ² ~mol ⁻¹ respectively. The _ m ^ of NH ₄ OH will be

Step-by-step solution

_ m ( NH ₄ OH ) ^ = _ m ( NH ₄ Cl ) ^ + _ m ( NaOH ) ^ - _ m ( NaCl ) ^ =130+248-126.5=251.5 ⁻¹ ~cm ² ~mol ⁻¹