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In the equilibirum mixture br CaCO3(...

In the equilibirum mixture br `CaCO_3(s) ⇋ CaO(s) + CO_2(g)`. Pressure of `CO_2(g)` at 27°C is 2 atm. What will be the pressure of `CO_2(g)` when 2 moles of `CO_2` are added into equilíbirum mixture?

A

6 atm

B

5 atm

C

4 atm

D

2 atm

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