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हाइड्रोक्लोरिक अम्ल के `500 mL 0.357` मोलर जलीय विलयन बनाने के लिए आवश्यक हाइड्रोक्लोरिक अम्ल के द्रव्यमान की गणना करे। (हाड्रोक्लोरिक अम्ल का मोलर द्रव्यमान `=36.5 g mol^(-1)`)

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मान ले की हाइड्रोक्लोरिक अम्ल की आवयशक मात्रा `w g` है।
हाइड्रोक्लोरिक अम्ल `(HCl)` का मोलर द्रव्यमान `=36.5 g mol^(-1)`
`:. HCl` के मोलो की संख्या `=(w)/(365)mol`
विलयन का आयतन `=500mL=0.5L`
अब, विलयन की मोलरता `(M)=(w//36.5)/(0.5)`
या `0.357=(w//36.5)/(0.5)`
या `w=(0.357xx36.5xx0.5)g`
`=6.515g`

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