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For the reaction A(g) = B (g) at 495 K, ...

For the reaction `A(g) = B (g) at 495 K, Delta _(r ) G ^(@)=- 9. 478 kJ mol ^(-1).`
If we start the reaction in a closed container at 495 K with 22 millimoles of A, the amount of B in the equilibrium mixture is `"_____________"` millimoles. (Round off to the Nearest Integer).
`[R = 8.314] mol ^(-1) K ^(-1), ln 10= 2.303]`

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