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If the limiting slope of density vs. pressure plot for air at \( 0^{\circ} \mathrm{C} \) is \( 1.27 \times 10^{-5} \mathrm{~kg} \mathrm{~m}^{-3} \mathrm{~Pa}^{-1} \), the molar mass of air would be:
(A) \( 14.42 \times 10^{-3} \mathrm{~kg} \mathrm{~mol}^{-1} \)
(B) \( 23.89 \times 10^{-3} \mathrm{~kg} \mathrm{~mol}^{-1} \)
(C) \( 28.82 \times 10^{-3} \mathrm{~kg} \mathrm{~mol}^{-1} \)
(D) \( 32.89 \times 10^{-3} \mathrm{~kg} \mathrm{~mol}^{-1} \)
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