(a) A sample of tetrachloroethylene, a liquid used in dry cleaningthat is being phased out because of its potential to cause cancer,has a mass of 40.55 g and a volume of 25.0 mL at 25 °C. Whatis its density at this temperature? Will tetrachloroethylene floaton water? (Materials that are less dense than water will float.)(b) Carbon dioxide (CO2) is a gas at room temperature andpressure. However, carbon dioxide can be put under pressure tobecome a “supercritical fluid” that is a much safer dry-cleaningagent than tetrachloroethylene. At a certain pressure, the densityof supercritical CO2 is 0.469 g/cm3. What is the mass of a25.0-mL sample of supercritical CO2 at this pressure?
(a) A sample of tetrachloroethylene, a liquid used in dry cleaning
that is being phased out because of its potential to cause cancer,
has a mass of 40.55 g and a volume of 25.0 mL at 25 °C. What
is its density at this temperature? Will tetrachloroethylene float
on water? (Materials that are less dense than water will float.)
(b) Carbon dioxide (CO2) is a gas at room temperature and
pressure. However, carbon dioxide can be put under pressure to
become a “supercritical fluid” that is a much safer dry-cleaning
agent than tetrachloroethylene. At a certain pressure, the density
of supercritical CO2 is 0.469 g/cm3. What is the mass of a
25.0-mL sample of supercritical CO2 at this pressure?
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