A Block of Dry Ice (Solid CO₂, Density = 1

question 129

Multiple Choice

A block of dry ice (solid CO₂, density = 1.56 g/mL) of dimensions 25.0 cm × 25.0 cm × 25.0 cm is left to sublime (i.e., to pass from the solid phase to the gas phase) in a closed chamber of dimensions 4.00 m × 5.00 m × 3.00 m. Once the sublimation is complete, what is the partial pressure of carbon dioxide in the chamber at 25°C? (R = 0.08206 L • atm/K • mol, 1 atm = 760 mmHg)

• A) 172 mmHg
• B) 107 mmHg
• C) 0.225 mmHg
• D) 0.172 mmHg
• E) 14.4 mmHg

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