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Analysis of many gaseous compounds of ph...

Analysis of many gaseous compounds of phosphorus shows that 1 litre of any gas at NTP never contains less than 1.384 g of phosphorus Again one litr eof phosphorus regarding approximate atomic mass. Molecular mass and atomicity of phosphorus from the above results?

Text Solution

Verified by Experts

One gram mole of any gas occupies volume at NTP=22.4 litre.
One gram mole of any gas does not contain less than
`1.384xx22.4=31g` of phosphorus.
So, according to Cannizzaro's concept, the approximate atomic mass of phosphorous should be 31.
Mass of one gram mole of phosphorus vapour
`=5.536xx22.4=124`
Atomicity of phosphorus `=("Mol.mass")/("At.mass")`
`=(124)/(31)=4`
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Knowledge Check

  • A compound contains 10^(-2)% of phosphorus. If atomic mass of phosphorus is 31 , the molar mass of the compound having one phosphorus atom per molecule is:

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