How much ice (in grams) at 0 °C would have to melt to lower the temperature of 355 mL of water from 26 °C to 6 °C? (Assume the density of water is 1.0 g/mL.) Express your answer using two significant figures. ► View Available Hint(s) m = 89 Submit ΑΣΦ Previous Answers Request Answer ? g

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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.