Grade 12Physical Chemistry
no. of molecules and atoms in 54gm of H2O
no. of molecules and atoms in 54gm of H2O
9 Answers
Avinash
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
No. of atoms or moleules = 3 x Avagadro no. =3 mol x 6.022 x 1023mol-1 =18.066 x 1023 mol-1
vindhya
will the no. of atoms and no. of molecules be same?
please tell me Avinash sir
Avinash
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
Prajwal Kavad
Approved Tutor Answer11 Years agono 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
vindhya
avinash sir, please tell me, is prajwal kavad correct?
vindhya
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.
Avinash
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
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
vindhya
thanks a lot to prajwal kavad for correction and of course Avinash sir
for a good explanation.
Prajwal Kavad
my pleasure
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