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Grade: 10
        How many moles of electron weighs one kilogram?

a. 6.023 × 1023
b. 1/9.108× 1031
c. 6.023/9.108× 1054
d. 1/(9.108 ×6.023)× 108
5 years ago

Answers : (1)

Kevin Nash
askIITians Faculty
332 Points
							Sol. Mass of an electron
 = 9.108 × 10-31 kg
∵ 9.108 × 10-31 kg = 1.0 electron
∴   1 kg = 1/〖9.108 ×10〗^(-31)  electrons
= 〖10〗^31/9.108  ×  1/〖6.023 ×10〗^23 
= 1/(9.108 ×6.023)× 108 mole of electrons.

						
5 years ago
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