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vindhya Grade: 12
        
no. of molecules and atoms in 54gm of H2O
one year ago

Answers : (9)

Avinash
askIITians Faculty
1246 Points
										No. of moles = wt/GMwt =54/18 = 3

No. of atoms or moleules = 3 x Avagadro no. =3 mol x 6.022 x 1023mol-1 =18.066 x 1023 mol-1
one year ago
vindhya
50 Points
										
will the no. of atoms and no. of molecules be same?
please tell me Avinash sir
one year ago
Avinash
askIITians Faculty
1246 Points
										
Yes,no. of atoms and no.of molecules be same since it contains avagadro no of molecules or avagadro no of atoms that mutliplied with no. of moles. so the count will be equal
one year ago
Prajwal Kavad
603 Points
										
no AVINASH sir is wrong , no of molecules are 3xNa and no, of atoms are 9xNa sir there seems to be some problem with you basics
one year ago
vindhya
50 Points
										
avinash sir, please tell me, is prajwal kavad correct?
one year ago
vindhya
50 Points
										
please tell me prajwal kavad, why is it that no. of atoms are 9 x Na ?
kindly explain your answer, if you don't mind.
one year ago
Avinash
askIITians Faculty
1246 Points
										Yes prajwal kavad is right. I’m giving answer for tri atoms and the giving the second reply instead in the thought process of calculation for mono atom.

Vindhya, jst multiply (2 hydrogen atom + 1 oxygen atom) x total no. of molecules

No. of moles = wt/GMwt =54/18 = 3

No. of moleules = 3 x Avagadro no. =3 mol x 6.022 x 1023mol-1=18.066 x 1023

No. of atoms = 3 x18.066 x 1023 = 54.198 x1023
one year ago
vindhya
50 Points
										
thanks a lot to prajwal kavad  for correction and of course Avinash sir  
for a good explanation.
one year ago
Prajwal Kavad
603 Points
										
my pleasure
one year ago
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