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When 20g of CaCO3 is put into a 11.45...

When 20g of `CaCO_3` is put into a 11.45L flask and heated to `800^@C` , 35% of `CaCO_3` remains undissociated at equilibrium. Calculate the value of `K_p`.

A

`1.145 atm`

B

`0.145 atm`

C

`2.145 atm`

D

`3.145 atm`

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