Chemistry (OER)
19th Edition
ISBN: 9781947172623
Author: OpenStax
Publisher: OpenStax College
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Textbook Question
Chapter 3, Problem 46E
What does it mean when we say that a 200-mL sample and a 400-mL sample of a solution of salt have the same molarity? In what ways are the two samples identical? In what ways are these two samples different?
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In the normal hydrogen electrode, the balance potential difference in the interface is 0 and the current flow across the electrode when the interface potential difference is +5 mV. Explain briefly. Is the overvoltage 5 mV?
In the normal hydrogen electrode, the balance potential difference in the interface is 0 mV, the maximum potential is 5 mV. Explain briefly.
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(b) Atoms are said to be electrically neutral. Explain.
(c)
Distinguish
between the following:
(i) Atomic number and mass number.
(ii) Mass number and relative atomic mass.
2. An isotope Q, has 18 neutrons a mass number of 34.
(a) (i) Draw the atomic structure of Q.
(ii) Write its electron arrangement
(b) To which period and group does Q belong? Explain your answer.
(c) How does Q form its ion? Explain.
3. (a) Determine the relative atomic mass of the following elements =
compositions occur in the proportions given.
(i) Neon
20
21
22.
Ne (90.92%), 10Ne (0.26%), and 10Ne (8.82%)
(ii) Argon
36
38
40
18 Ar (0.34%), 18 Ar (0.06%) and 18 Ar (99.6%)
Chapter 3 Solutions
Chemistry (OER)
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Solutions: Crash Course Chemistry #27; Author: Crash Course;https://www.youtube.com/watch?v=9h2f1Bjr0p4;License: Standard YouTube License, CC-BY