You should put a picture or finish the question
Answer: The density of the liquid is 
Explanation:
Density is defined as the mass contained per unit volume.
Given : Mass of the unknown liquid = 938 grams
Volume of the unknown liquid =
Putting in the values we get:
Thus the density of the liquid is
and the liquid is dimethyl sulfoxide.
CO2 will be the first to boil because it will be the first to warm up because it is the closest temperature to 0