Chapter 9: 9.70_P_1 (page 340)
(a) List four physical characteristics of a solid metal.
(b) List two chemical characteristics of a metallic element.
Metals are the electropositive elements, donating electrons to form positive ions and becoming stable.
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Acetylene gas (ethyne; HC≡CH) burns in an oxyacetylene torch to produce carbon dioxide and water vapour. The heat of reaction for the combustion of acetylene is 1259 kJ/mol.
(a) Calculate the C≡C bond energy, and compare your value with that in Table 9.2, p. 353.
(b) When 500.0 g of acetylene burns, how many kilojoules of heat are given off?
(c) How many grams of
(d) How many litres of
What is the general relationship between and EN for the elements? Why?
Used condensed electron configuration to predict the relative hardness and melting points of Rubidium (Z=37), Vanadium (Z=23) and Cadmium (Z= 48).
Which is the more polar bond in each of the following pairs from Problem 9.61: (a) or (b); (c) or (d); (e) or (f)?
Use Figure 9.20, p. 364, to indicate the polarity of each bond with partial charges
(a) Br-Cl
(b) F-Cl
(c) H-O
(d) Se-H
(e) As-H
(f) S-N.
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