Forum

Forums
JEE
Physics
Number of molecules...
 
Notifications
Clear all

Number of molecules in a volume of 4 cm^3 of a perfect monoatomic gas at some temperature T and at a pressure of 2 cm of mercury is close to?

 
Physics
Last Post by nikhil04 4 years ago
1 Posts
2 Users
0 Likes
782 Views
0
19/09/2020 3:24 pm
Topic starter
aditi07 
(@aditi07)
Famed Member
1359 Posts
1130 3 2

Number of molecules in a volume of 4 cm3 of a perfect monoatomic gas at some temperature T and at a pressure of 2 cm of mercury is close to? (Given, mean kinetic energy of a molecule (at T) is 4 × 10-14 erg, g = 980 cm2, density of mercury = 13.6 g/cm3).

(1) 5.8 × 1016

(2) 4.0 × 1016

(3) 4.0 × 1018

(4) 5.8 × 1018

Add a comment
Topic Tags
jee jee main 2020
1 Answer
0
19/09/2020 3:27 pm
nikhil04 
(@nikhil04)
Noble Member
1353 Posts
0 1129 0

(3) 4.0 × 1018

Explanation:

N = PV/KT

U = 3/2 KT

∴ N = 3PV/2U = 3.99 x 1018

Add a comment
Forum Jump:
  Previous Topic
Next Topic  
Related Topics
Topic Tags:  jee (1543) , jee main 2020 (199) ,
Share:

How Can We Help?

    Home

    About Us

    Contact Us

    Privacy Policy

    Term of Use

    Copyright © 2020 Eanshub

    All Rights Reserved