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When 20 g of CaCO(3) were put into 10 li...

When `20 g` of `CaCO_(3)` were put into `10 litre` flask and heated to `800^(@)C`, `35%` of `CaCO_(3)` remained unreacted at equilibrium. `K_(p)` for decomposition of `CaCO_(3)` is :

A

`1.145 atm`

B

`0.145 atm`

C

`2.145 atm`

D

`3.145 atm`

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