5. Gaseous substances A and B react with the formation of a gaseous product C. Express CR and CC in terms of the equilibrium amount of substance C, equal to x, if the starting substances A and B are taken in stoichiometric quantities at a total pressure of the equilibrium system P and temperature T, K. Calculate CR and CC at 300 K if P=7.5 104 Pa, x=0.45. Calculate the equilibrium amount of substance C under the given conditions. Take the data in Table. 3.

Table 3. Reaction equations (by options)
No. vari-
anta Reaction equation
5 2A 1/2V=2C

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