The following experiment is performed with an unknown
liquid. The liquid is added to a graduated cylinder with
a mass of 54.6789 grams. After 20.00 mL of the liquid is
added to the cylinder (at 298 K), the mass is 74.6215
grams. Is the liquid water? How do you know? If it is not
water, what could it be?
The experiment is repeated
with a second liquid, after 21.3 mL of this liquid (at 20
°C) is added the mass of the cylinder is 72.7364 grams.
Is the second liquid ethanol? How do you know? If it is
not ethanol, what could it be?