A system at equilibrium contains I2(g) at a pressure of 0.21 atm and I(g) at a pressure of 0.23 atm. The system is then compressed to half its volume. Find the pressure of each gas when the system returns to equilibrium.

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you get 2.3=1.21*\frac{a}2 or 4.6=1.21a or a=3.802 (b)

explanation: