Answer:
(i) Number of atoms s=
Number of moles
\[\times
6.023\times {{10}^{23}}\]
\[=52\times
6.023\times {{10}^{23}}\]
\[=3.13\times
{{10}^{25}}\]
(ii) 4 amu He has
one atom.
\[\therefore
\] 52 amu He will have 13 atoms.
(iii) Number
of atoms
\[=\frac{\text{mass}}{\text{Atomic}\,\text{mass}}\times
6.023\times {{10}^{23}}\]
\[=\frac{52}{4}\times
6.023\times {{10}^{23}}\]
\[=7.83\times
{{10}^{24}}\]
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