Bundle: Introductory Chemistry: A Foundation, Loose-leaf Version, 9th + OWLv2 with MindTap Reader, 1 term (6 months) Printed Access Card
9th Edition
ISBN: 9780357000922
Author: Steven S. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Chapter 2, Problem 3ALQ
When a marble is dropped into a beaker of water, it sinks to the bottom. Which of the following is the best explanation?
- The surface area of the marble is not large enough for the marble to be held up by the surface tension of the water.
Explain each choice. That is, for choices you did not pick, explain why you feel they are wrong, and justify the choice you did pick.
Expert Solution & Answer
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Students have asked these similar questions
Oil
Ethanol
and
Water
Water
A student combines equal volumes of ethanol and water in a beaker and stirs the mixture. The student repeats this process but with equal volumes of oil and water in a different beaker. The student observes the contents
of the beakers after they are mixed, as shown in the diagram. Which TWO of the following statements are consistent with the student's observations?
Ethanol molecules and water molecules are both polar, so they mix well with each other.
Ethanol molecules are nonpolar and water molecules are polar, so they mix well with each other.
Oil molecules and water molecules are both polar, so they do not mix well with each other.
D
Oil molecules are nonpolar and water molecules are polar, so they do not mix well with each other.
You weigh a dry flask, and place a chunk of solid into it, then weigh it again.
You then fill the flask to the top with water and weigh the full flask.
Finally, you take the solid out, fill the flask to the top with water and weigh it once more.
Mass of flask in (g) 58.97
Mass of flask plus solid (g) 135.91
Mass of flask plus solid and water (g) 146.69
Mass of flask filled with water (g) 84.77
Density of water at the measured water temperature (g/cc) 0.992
Calculate the following:
The mass of the solid in (g)
1. A solution is prepared by taking a clean and dry 50.0 ml
volumetric flask. You are tasked to prepare a saline solution with
your table salt placed in a watch glass. You measured the
following in the laboratory.
147 g
Mass of volumetric flask
Mass of watch glass glass + salt
Mass of watch glass after adding
salt to the volumetric flask
30.0 g
23.5 g
Some water is added to the flask. The solution is stirred until all
salt is dissolved. The filled flask of the saline solution is then
weighed again.
Mass of filled flask 202 g
What are the mole fractions of sodium chloride and water?
Chapter 2 Solutions
Bundle: Introductory Chemistry: A Foundation, Loose-leaf Version, 9th + OWLv2 with MindTap Reader, 1 term (6 months) Printed Access Card
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