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Chapter 1: Problem 39

Which of the following are elemental substances and which are compounds: chlorine, \(\mathrm{Cl}_{2}\); octane, \(\mathrm{C}_{8} \mathrm{H}_{18} ;\) sulfur, \(\mathrm{S}_{8} ;\) neon, Ne?

Short Answer

Expert verified
Chlorine (\(\mathrm{Cl}_{2}\)) and sulfur (\(\mathrm{S}_{8}\)) are elemental substances, while octane (\(\mathrm{C}_{8} \mathrm{H}_{18}\)) is a compound. Neon (Ne) is also an elemental substance.

Step by step solution

01

Substance 1: Chlorine (Cl2)

Chlorine is given the chemical formula \(\mathrm{Cl}_{2}\). This formula indicates that there are two chlorine atoms bonded together in a molecule. Since there is only one type of element (chlorine) present, it is considered an elemental substance.
02

Substance 2: Octane (C8H18)

Octane has the chemical formula \(\mathrm{C}_{8} \mathrm{H}_{18}\). This formula shows that there are eight carbon atoms and eighteen hydrogen atoms in a molecule of octane. Since there are two different elements (carbon and hydrogen) present, octane is considered a compound.
03

Substance 3: Sulfur (S8)

Sulfur is given the chemical formula \(\mathrm{S}_{8}\). This formula indicates that there are eight sulfur atoms bonded together in a molecule. Since there is only one type of element (sulfur) present, it is considered an elemental substance.
04

Substance 4: Neon (Ne)

Neon is given the chemical symbol Ne. This symbol represents a single atom of neon, as there is only one type of element (neon) present. Therefore, neon is an elemental substance. To summarize: - Chlorine (\(\mathrm{Cl}_{2}\)) is an elemental substance. - Octane (\(\mathrm{C}_{8} \mathrm{H}_{18}\)) is a compound. - Sulfur (\(\mathrm{S}_{8}\)) is an elemental substance. - Neon (Ne) is an elemental substance.

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