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For the reaction, SO2(g) + 1/2 O2(g) iff...

For the reaction, `SO_2(g) + 1/2 O_2(g) iff SO_3(g)`, the value of `K_c` is `1.7 xx 10^(12)` at 300K. Calculate the equilibrium constants for the following reactions at 300K :
`2SO_2(g) + O_2(g) iff 2SO_3(g)`
and `SO_3(g) iff SO_2(g) + 1/2O_2(g)`

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