Solution usually consist of two parts. The part that dissolves, or the , and the part that does the dissolving, or the 

i need mutiple choices

space exploration has led to the development and technological improvement of many everyday items. (if this answer is wrong i will find the right answer) : )

frequency, z, and the collision density, z, in carbon dioxide (co2), r 180 pm at 30 °c and 120 kpa