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Molecular Speeds - Vrms, Vavg, Vmps

Number of mol...

Question

Number of molecules and atom in 54 gm H2O

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Solution

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

No. of molecules = 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 x10^{23

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