Chemistry
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Introduction to chemistry
Chemistry is a branch of science that deals with the analysis of material and the substances that comprise it. It also manages the properties of these substances and their reactions to form new substances. It is basically centered on particles and atoms …
Question

(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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