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Volume of \( \mathrm{N}_{2} \) at NTP required to form a mono layer on the surface of iron catalyst is \( 8.15 \mathrm{ml} / \mathrm{gram} \) of the
\( \mathrm{P} \) adsorbent. What will be the surface area of the

W adsorbent per gm if each nitrogen molecule occupies \( 16 \times 10^{-22} \mathrm{~m}^{2} \).
(1) \( 16 \times 10^{-16} \mathrm{~cm}^{2} \)
(2) \( 0.35 \mathrm{~m}^{2} / \mathrm{g} \)
(3) \( 39 \mathrm{~m}^{2} / \mathrm{g} \)
(4) \( 22400 \mathrm{~cm}^{2} \)
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