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A Dumas bulb was filled with 0.4524 g of...

A Dumas bulb was filled with `0.4524` g of vapour at `136^(@)C` and 758 mm of pressure. Calculate moleclar weight of the vapour if the capacity of the bulb is 127 mL.

Text Solution

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Volume of vapor at `NTP = ( 758 xx 127 xx 273)/(409 xx 760)= 84.57 mL.`
Mole of vapour `= (84.57)/(22400).`
`therefore ` molecular weight `= 0.4524 xx (22400)/(84.57)= 119.8.`
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