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Need help with these please: 1). At a certain temperature the equilbrium constant is 309 for...

Need help with these please:

1). At a certain temperature the equilbrium constant is 309 for

H2(g) + I2(g) ↔ 2HI(g)

Calculate the the equilbrium constant for

0.5H2(g) + 0.5I2(g) ↔ HI(g)

2). Phosgene is formed from carbon monoxide and chlorine. At 597 oC, Kc is approximately 17.2 M-1 or L/mol. Calculate Kp (in atm-1) at this temperature.

CO(g) + Cl2(g) ↔ COCl2(g)

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