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Chapter 1: Q55 E (page 66)
Consider the results of the archery contest shown in this figure.
(a) Which archer is most precise?
(b) Which archer is most accurate?
(c) Who is both least precise and least accurate?
(a) Archer X
(b) Archer W
(c) Archer Y
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A 500-mL bottle of water at room temperature and a 2-L bottle of water at the same temperature were placed in a refrigerator. After 30 minutes, the 500-mL bottle of water had cooled to the temperature of the refrigerator. An hour later, the 2-L of water had cooled to the same temperature. When asked which sample of water lost the most heat, one student replied that both bottles lost the same amount of heat because they started at the same temperature and finished at the same temperature. A second student thought that the 2-L bottle of water lost more heat because there was more water. A third student believed that the 500-mL bottle of water lost more heat because it cooled more quickly. A fourth student thought that it was not possible to tell because we do not know the initial temperature and the final temperature of the water. Indicate which of these answers is correct and describe the error in each of the other answers.
Which produces more heat?
\({\bf{Os}}\left( {\bf{s}} \right) \to {\bf{2}}{{\bf{O}}_{\bf{2}}}\left( {\bf{g}} \right) \to {\bf{Os}}{{\bf{O}}_{\bf{4}}}\left( {\bf{s}} \right)\)
or
\({\bf{Os}}\left( {\bf{s}} \right) \to {\bf{2}}{{\bf{O}}_{\bf{2}}}\left( {\bf{g}} \right) \to {\bf{Os}}{{\bf{O}}_{\bf{4}}}\left( {\bf{g}} \right)\)
for the phase change \({\bf{Os}}{{\bf{O}}_{\bf{4}}}\left( {\bf{s}} \right) \to {\bf{Os}}{{\bf{O}}_{\bf{4}}}\left( {\bf{g}} \right){\bf{ \Delta H = 56}}{\bf{.4 kJ}}\)
Of the five elements Al, Cl, I, Na, Rb, which has the most exothermic reaction? (E represents an atom.) What name is given to the energy for the reaction? Hint: note the process depicted doesnotcorrespond to electron affinity
\({{\bf{E}}^ + }(g){\rm{ }} + {\rm{ }}{{\bf{e}}^ - } \to {\bf{E}}(g)\)
Question:Using complete subshell notation (1s22s22p6, and so forth), predict the electron configurations of the following
ions.
(a) N3–
(b) Ca2+
(c) S–
(d) Cs2+
(e) Cr2+
(f) Gd3+
Indicate the SI base units or derived units that are appropriate for the following measurements:
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