Using the phase diagram for CO2, what phase is carbon dioxide in at -20°C
and 1 atm pressure?
O
A. It is in the solid phase.
O
B. It is at its boiling point.
O
c. It is in the liquid phase.
D. It is in the gas phase.

2b2t

explanation:

2b2t

qualitative observation deals with data that can be observed with our senses: sight, smell, touch, taste, and hearing. they do not involve measurements or numbers. for instance, colors, shapes, and textures of objects are all qualitative observations.