143. Solving a chemistry problem

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6.28. Below are the results of measuring the adsorption of gaseous krypton (at 77.5 K) on the catalyst:
P, Pa 13.22 23.99 49.13 75.70 91.22
A * 103, m3 / kg 1.27 1.5 1.76 1.9 1.98
A values for krypton are given under normal conditions. Determine the constants of the BET equation and the specific surface area of the catalyst, assuming that one krypton atom occupies an area
0.195 nm2, Ps = 342.6 Pa, the krypton density is 3.74 kg / m3.

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