Note that the triple point for CO 2 is above 1 atm, thus liquid CO 2 is not seen in the open on Earth's surface. We most commonly think of solutions as being liquid, but solid solutions also occur, such as the various metal alloys like steel, brass and bronze. In a solution the substance present in highest concentration is considered to be the solvent, while components in lesser amounts are considered to be solutes. If you dissolve a sugar cube in water you get a sugar solution, where water is the solvent, and sugar is the solute. Thus the concentration will be 6.135 x 10 -2 M Dilution problems.
All gases are completely soluble in each other.