Nitrogen from a gaseous phase is to be diffused into pure iron at 700C. If the surface concentration is maintained at 0.16 wt% N what will be the concentration (in weight percent) 3.9 mm from the surface after 5.9h? The diffusion coefficient for nitrogen in iron at 700C is 46 * 10-10 m/s erfiz) erfr) erf(z) Z Z Z 0.00 0.0000 0.55 0.5633 13 0.9340 0.025 0.0282 0.60 0.6039 1.4 0.9523 0.05 0.0564 0.65 0.6420 15 0.9661 0.10 0.1125 0.70 0.6778 1.6 0.9763 0.15 0.1680 0.75 0.7112 1.7 0.9838 0.20 0.2227 0.80 0.7421 1.8 0.9891 025 0.2763 0.85 0.7707 1.9 0.9928 0.30 0.3286 0.90 0.7970 20 0.9953 0.35 0.3794 0.95 0.8209 22 N 0.40 0.9981 0.9993 0.4284 10 0.8427 24 0.45 0.4755 11 0.8802 2.6 0.9998 0.50 0.5205 12 0.9103 2.8 0.9999