A system of 1470 particles, each of which is either an electron or a proton has a net charge of -5.456 x 10^-17 C. (a) How many electrons are in this system? (b) What is the mass of this system?

a

b

Explanation:

From the question we are told that

   The total number of particles is  n =  1470 particles

    The  the total amount of charge on the particles is  

Generally this total number of particles can be mathematically represented as

Where   represent the number of proton and electron respectively

=>    

Also the total charge of these particles can be mathematically represented as

Here e is the charge on a single electron or proton with value  

The  negative sign is due to the fact the electrons are negative signed

Thus  

Generally the mass of the system is mathematically represented as

Here  

So