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The mass of an electron is 9.11xx10^(-31...

The mass of an electron is `9.11xx10^(-31)kg.` How many electrons would make 1kg?

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Here, mass of an electron `=9.11xx10^(-31)kg,` total mass = 1kg
`:. "Number of electrons = ""total mass"/("mass of each electron")`
`=1/(9.11xx10^(-31)) = 1.1xx10^(30)`
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