Question

Arrange the following in the increasing order of number of molecules. a) 22g CO2 b) 2.24L NH3 at STP c) 1 mol NO2​

Answer 1

Answer:

For a molecule,

molecular weight in grams = Avogadro's number(N  

A

​

)=6.023×10  

23

 

(A) 1g CO  

2

​

 

44 gram of  CO  

2

​

 =N  

A

​

 molecules

∴  1  gram  of  CO  

2

​

  contains  

44

1

​

×N  

A

​

 molecules

(B) 1g N  

2

​

 

28 gram of   N  

2

​

=N  

A

​

 molecules

∴1 gram of  N  

2

​

 contains  

28

1

​

×N  

A

​

 molecules

(C) 1g H  

2

​

 

2 gram of H  

2

​

 contains N  

A

​

molecules

∴ 1  gram of H  

2

​

 contains    

2

1

​

×N  

A

​

 molecules

(D) 1g  CH  

4

​

 

16 gram of CH  

4

​

 =N  

A

​

 molecules

∴ 1 gram of   CH  

4

​

 =N  

A

​

/16

Maximum number of molecules are found in 1 gram hydrogen.

Explanation: