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| 1. |
How many moles are there in 1kg of electron |
| Answer» The mass of an electron is {tex}9.1 \\times 10^{-31}{/tex} kgTherefore number of electrons in 1kg = {tex}1\\over 9.1\\times 10^{-31 }{/tex}electrons = {tex}1.09 \\times 10^{30 }{/tex}Electron Number of particles in 1 mole =\xa0{tex}6.023 \\times 10^{23}{/tex} (Avagadro’s constant)So , Number of moles ={tex} number \\ of \\ electrons\\over Avagadro’s \\ constant {/tex}= {tex}{1.09 \\times 10^{30}\\over 6.023 \\times 10^{23}} = {1.8 \\times 10^6}{/tex} electrons | |