Question

The shape of tobacco mosaic virus (TMV) is cylindrical, having length 3000 Å and diameter 170 Å. If the specific volume of virus is 12.5 ml/g, the molecular mass of TMV is (N=6* 10²³)​

Answer 1

Answer:

Volume of single TMV virus =  

4

1

​  

πd  

2

l

=  

4

1

​  

×3.14×(1.70×10  

−6

)  

2

×(3×10  

−5

)

=6.8×10  

17

 cm  

3

 

Mass of single virus particle =6.8×10  

−17

×  

12.5

1

​  

 

=0.544×10  

−17

 gm

Molecular mass of TMV virus =N  

A

​  

×mass of one unit

6.23×10  

23

×0.544×10  

−17

 

=3.28×10  

6

 gm

Explanation: