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The pressure of sodium vapour in a 1.0 L...

The pressure of sodium vapour in a 1.0 L container is 10 torr at `1000^(@)C`. How many atoms are in the container?

A

`9.7xx10^(17)`

B

`7.6xx10^(19)`

C

`4.2xx10^(17)`

D

`9.7xx10^(19)`

Text Solution

Verified by Experts

The correct Answer is:
B
`PV=nRT`
`n=(1xx10)/(76xx0.0821xx1273)=1.26xx10^(-3)`
No. of Na atoms= `1.26xx10^(-3)xx6.02xx10^(23)=7.6xx10^(19)`
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