Gold has a melting point Of 1338 K with AH°fus = 12.7 kJ/mol and boils at 3080 K with AH°vap = 310 kJ/mol. Given the specific-heat capacities (in J/g K) of Au(s), Au(I), and Au(g) are 0.131, 0.149, and 0.0632, respectively, how much heat (J) is requires to convert 2.15 Au(s) at 1000 K to liquid at 1500K? 160. J 12.8 J 81.1 J O285 J Question 25 Which is the oxidizing agent in the reaction below? Cr₂O7²- + 6 S₂03² + 14 H*→ 2 Cr³+ + 3 S406² +7 H₂O O Cr₂O7²- 2ܘܘ MacBook Pro

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Crystal Structures

Solids are present all around us. They have different properties and applications. Diamond and graphite are two well-known solids. Diamond is the hardest material in the world and is used in making jewelry. Graphite on the other hand is soft. The lead of your pencil is graphite. Why are they so different in appearance and properties despite the fact they are chemically the same? Both are allotropes of carbon. The answer lies in the structure, the way constituent particles are arranged in the solids.