wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

How many moles of electron weighs one kilogram?


A

6.023×1023 moles

No worries! We‘ve got your back. Try BYJU‘S free classes today!
B

19.108×6.023×108 moles

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C

6.0239.108×1054 moles

No worries! We‘ve got your back. Try BYJU‘S free classes today!
D

19.108×0.023×1031 moles

No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B

19.108×6.023×108 moles


Explanation for the correct option:

Option (B):
Step 1: Calculation of one mole of the electron:
The number of electrons present in one mole of a substance =6.023×1023electrons (Avogadro number,NA )

Also the mass of one electron i=9.108×1031kg
Therefore,

The mass of one mole of electrons can be given as= the mass of one electron ×× number of electrons in one mole
mass of one mole of electrons =(9.108×1031)×(6.022×1023) kg

Step 2: Calculation of moles of electron weighing in one kilogram:
We are asked to find the number of electrons present in one kilogram.
We have already calculated,

mass of one mole of electrons =(9.108×1031)×(6.022×1023) kg
(9.108×1031)×(6.022×1023) kg contains = 1 mole of electrons
1 kg will contain = 1(9.108×1031)×(6.022×1023) moles of electrons.
Or, 1 kg will contain = 19.108×6.022×108 moles of electrons.
Thus, the number of moles of electrons weighing in one kilogram= 19.108×6.022×108 moles of electrons

Thus, option B is the correct option.


flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Mole Concept
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon