1.

(i) Calculate the numberof electronswhichwilltogetherweigh onegram (ii)Calculatethemass andchargeof onemoleof electron .

Answer»

Solution :Massof 1 ELECTRON= 9.11`xx 10^(10)kg`
`9.11 xx 10^(28) kg`
CHARGEOF 1electron= 1.602`xx 10^(19) C`
1 mole=6.02`xx 10^(23)`
(i) 9.11 `xx10^(31) kg `electron= 1 electron
`(0.001 kg xx 1)/(9.11 xx 10^(31) kg) = (0.001 xx 10^(4))/(9.11 xx 10^(27))`
(ii)Charge of 1 moleelectron
`=1.602 xx 10^(19)c xx 6.022xx 10^(23)`
`=96470 C ` charge= 9.647`xx 10^(4)` C
mass of 1 moleelectron
`=5.486xx 10^(7)kg =5.486 xx 10^(4) gamma `


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