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A 50.0 g piece of CO2(s) (i.e. “dry ice”) is sealed inside a 0.250 L container...

A 50.0 g piece of CO2(s) (i.e. “dry ice”) is sealed inside a 0.250 L container held at 20°C. Based on the phase diagram of CO2 (Figure 11.42 in the textbook), what state(s) of matter are present inside the container?

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