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NCERT Class XI Chemistry States of Matter Solutions

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Question : 10
Total: 23
34.05 mL of phosphorus vapours weigh 0.0625 g at 546°C and 0.1 bar pressure. What is the molar mass of phosphorus?
Solution:  
Molar mass of phosphorus, M
m = Mass of phosphorus
M =
mRT
PV
 =
0.0625×0.083×819
(0.1)×(34.05∕1000)
 = 1247.74 g/mol
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