3. When processing data on nitrogen adsorption on the adsorbent at 77 K using a graph corresponding to the linear BET equation, it was found that the slope of the straight line is 1900, and the segment cut off along the ordinate axis is 15 units. Adsorption is expressed in m3 of nitrogen per 1 kg of adsorbent at n.o.s. Calculate the specific surface area of this adsorbent, assuming that the area occupied by 1 nitrogen molecule is 0.19 nm2.

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