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the mass of an electron is approximately 9.109X10^-28 Find the mass of 257,000,000 electrons

Answer :

Since3122015
[tex]257,000,000*9.109*10^{-28}\\2,341,013,000*10^{-28}\\0.0000000000000000002341013\\\\2.341013*10^{-19}[/tex]

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