Calculating Electron Count and Mass in a Charged System

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In a system of 1525 particles with a net charge of -5.456 x 10^-17, the presence of excess electrons indicates that there are 933 electrons in total after calculating 341 excess electrons. The mass of the system can be determined by first calculating the number of protons, then using the formula for total mass, which combines the mass of protons and electrons. The mass of an electron is 9.11 x 10^-31 kg, and the charge of an electron is 1.60 x 10^-19 C. The calculations involve simple arithmetic based on the known quantities of charge and mass.
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1. A system of 1525 particles, all of which are electrons or protons, has a net charge of -5.456 x 10^-17. a) how many electrons are in the system? b) what is the mass of the system



2. mass of electrons is 9.11 x 10^-31.
charge of electron is 1.60 x 10^-19



3. i have no clue, can someone help
 
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Since there is a net negative charge, there must be excess electrons. Use the magnitude of the excess charge to determine how many excess electrons there are. Now the remainder of the particles must be equally split between electrons and proton. You know how many of each. Simple arithmetic from there.
 
so do i divide the excess by the charge of an electon?
 
anybody help please
 
if they are equally split then that means the net force is zero.. which i don't think it is
 
ok, found that there are 341 extra electrons which makes the total electrons to be 933. now how do u find the mass?
 
Find the number of protons. Then total mass = no. of protons*Mp + no.of electrons*Me
 
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