QUESTION 6 If the atmospheric pressure is 190 torr, what is the pressure of the enclosed gas in a manometer assuming the mercury is at a height of 180 mm? O270 Torr O 27 Torr 2,700 Torr O 27 Torr QUESTION 7 What type of intermolecular force occurs between a sodiumion and water? O covalent O dipole-dipole Oion-dipole OH-bond QUESTION 8 Interstitial alloys are metal alloys formed by inserting smaller atoms into holes of the metal lattice O True O False

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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.