The Henrys law constant for the solubility of \( \mathrm{N}_{2} \) gas in water at \( 298 \mathr...

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The Henrys law constant for the solubility of \( \mathrm{N}_{2} \) gas in water at \( 298 \mathrm{~K} \) is \( 1.0 \times 10^{5} \mathrm{~atm} \). The mole fraction of \( \mathrm{N}_{2} \) in air is 0.8 . The number of moles of \( \mathrm{N}_{2} \) from air dissolved in 10 moles of water at \( 298 \mathrm{~K} \) and \( 5 \mathrm{~atm} \) pressure is
(a) \( 4.0 \times 10^{-4} \)
(b) \( 4.0 \times 10^{-5} \)
(c) \( 5.0 \times 10^{-4} \)
(d) \( 4.0 \times 10^{-6} \)
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