Question

The density of mercury is 13.6gm/ cm3 determine the mass of 5L of mercury in kilogram

Answer 1

Answer:

Avogadro's number (N  

A

​  

)=6.023×10  

23

 

Atomic weight of Hg=200

∵ In 1 gm of Hg number of atoms present

=  

2×10  

2

 

6.023×10  

23

 

​  

 

=3.012×10  

21

 

∵ Densiry of mexcury =13.6g∣c.c

∴ mass of 3.012×10  

21

 atoms =  

3.012×10  

21

 

1

​  

 

volumes of 1 atoms of Hg

3.012×10  

21

×13.6g∣c.c

1

​  

=  

3012×10  

21

×136

10  

3

×10

​  

 

⇒  

3012×136cc

10  

−17

 

​  

=  

409632cc

10  

−17

 

​  

 

=2.44×10  

23

c.c

Since each mercury atoms occuples a cube of edge length equals to its diameter.

Diameter of one Hg atom =(2.44×10  

−23

)  

1/3

cm

=(2.44×10  

−24

)  

1/3

cm

=2.905×10  

−8

cm

Explanation:

Answer 2

Answer:

The mass of 5 lit.

Mercury in kilogram. For 1 cm³ of Mercury will be 13.6 gram. = 68 kilogram.