Question

how many electrons are required to get 1C of negative charge

Answer 1

Q=N*e
1C= 6.25*10^18electrons

Answer 2

GIVEN ,
          Q = I C 
      We have a formula for finding this , which is,

                                                     Q = n × e 
In this ,
              n =  no of electrons 
              e = charge of 1 Electron,which is equal to 1.6 × $10^{-19}$

   SO ,
                        1 = n × 1.6 × $10^{-19}$
                        1 ÷ 1.6 × $10^{-19}$ = n 
                                   
                                         = 6.25 × $10^{18}$  electrons