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34.95 ml of phosphorus vapour weighs 0.0...

`34.95` ml of phosphorus vapour weighs `0.0625g ` at 0.1 bar pressure. What is the molar mass of phosphorus ?

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Verified by Experts

`PV=nRT`
`0.1"bar" xx(34.*05)/(10000L)=(0*0625)/(M) xx0*083xx819K`
`M=(0*0625xx0*083xx819Kxx1000)/(34*05xx0*1)=(4248*5625)/(3*405)=1247*7 "mol"^(-1)`
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