Question

A coin is made up of Al and weighs 0.75 g. It has a square
shape and its diagonal measures 17 mm. It is electrically
neutral and contains equal amounts of positive and
negative charges. The magnitude of these charges is​

Answer 1

Answer:

Explanation:

Mass of the coin =0.75g

Atomic mass of aluminium 26.98g

Number of Al atoms in the coin,

N=  

26.98

6.02×10  

23

 

​  

×0.75=1.67×10  

22

 

As charge number (z) Al is 13, each atom of Al contain 13s protons and 13 electrons. Magnitude of positive and negative charges is one paise coin

=NZe=1.67×10  

22  ×13×1.6×10  ^−19

C=3.47×10  

4

C