Which one is occurring? State an observation. • A metallic deposit appears • Bubbles appear • A temperature change occurs • A color change occurs • A precipitate (cloudy, tiny particles) appears

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Q: Balance the following reaction in acidic solution Fe2+(aq) + NO3−(aq)  Fe3+(aq) + NO(g)

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Q: What is the answer in KJ?

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Q: Provide the correct IUPAC name for the skeletal (line-bond) structure shown here.

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Q: Provide the correct common name for the compound shown here. O₂N NO₂ CH3 NO₂

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Q: Provide the correct systematic name for the compound shown here. H3CH₂CH₂C H3CH₂C

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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.