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एक लीटर NaOH विलयन में, 40 ग्राम NaOH उपास्थि हो तो गणना कीजिए-
NaOH का मोल प्रभाज,

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NaOH के मोल प्रभाज की गणना -
`1000cm^(3)` विलयन का द्रव्यमान `=1.038xx1000=1038` ग्राम
`NaOH` का द्रव्यमान =40 ग्राम
जल का द्रव्यमान `=1038 -40 =998 ` ग्राम
नोह के मोलो की संख्या `n_(A)=40/40=1`
जल के मोलो की संख्या `n_(B)=(998)/(18)=55.4`
NaOH का मोल प्रभाज
`X_(A)=(n_(A))/(n_(A)+n_(B))=(1)/(1+55.4)=0.018.`

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