64.What types of liquids typically form amorphous solids?65.At very low temperatures oxygen, O2, freezes and forms a crystalline solid. Which best describes thesecrystals?(a)ionic(b)covalent network(c)metallic(d)amorphous(e)molecular crystals
66.As it cools, olive oil slowly solidifies and forms a solid over a range of temperatures. Which best describesthe solid? (a) ionic
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67.Explain why ice, which is a crystalline solid, has a melting temperature of 0 °C, whereas butter, which is anamorphous solid, softens over a range of temperatures.68.Identify the type of crystalline solid (metallic, network covalent, ionic, or molecular) formed by each of thefollowing substances:(a)SiO2(b)KCl(c)Cu(d)CO2(e)C (diamond)(f)BaSO4(g)NH3(h)NH4F(i)C2H5OH69.Identify the type of crystalline solid (metallic, network covalent, ionic, or molecular) formed by each of the
