d
(\(1\)) \(4 u\) of \(\mathrm{He}=\frac{4 u}{4 u}=1 \mathrm{He}\) atom

(\(2\)) \(4 \mathrm{~g}\) of Helium \(=\frac{4 \mathrm{~g}}{4 \mathrm{~g}}\) mole \(=1 \mathrm{~mole}=\mathrm{NA}_{\mathrm{Ae}}\) atom

(\(3\)) \(2.2710982 \text { of He at STP } \)\( =\frac{2.271}{22.710982} \text { mole } \)

\( =0.1 \mathrm{~mole} \)

\( =0.1 \mathrm{~N}_{\mathrm{A}} \mathrm{He} \text { atom }\)

(\(4\)) \(4 \mathrm{~mol}\) of \(\mathrm{He}=4 \mathrm{~N} \mathrm{Ne}\) atoms