Question

Number of oxygen molecules in 1.12 litre of oxygen at S.T.P. is​

Answer 1

Answer:

Terms involved in the problem are volume of gas at S.T.P. and number of molecules. The standard relation connecting the above two terms is:

22.4litresofanygasatS.T.P.

contain

6.023×10

23

molecules

22.4litresofanyhydrogenatS.T.P

contain

6.023×10

23

molecules

1.12litresofhydrogenatS.T.P.

contain

xmolecules

⇒x=

22.4

1.12×6.023×10

23

=3.0115×10

22

molecules

Therefore,thenumberofmoleculespresentin1.12litresofhydrogenatS.T.P.is3.0115×10

22

molecules