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Chapter 2: Problem 72

Which of the following are elements, which are molecules but not compounds, which are compounds but not molecules, and which are both compounds and molecules? (a) \(\mathrm{SO}_{2},\) (b) \(\mathrm{S}_{8},\) (c) \(\mathrm{Cs}\), (d) \(\mathrm{N}_{2} \mathrm{O}_{5},(\mathrm{e}) \mathrm{O},(\mathrm{f}) \mathrm{O}_{2},(\mathrm{~g}) \mathrm{O}_{3},(\mathrm{~h}) \mathrm{CH}_{4},(\mathrm{i}) \mathrm{KBr}\) (j) \(\mathrm{S},(\mathrm{k}) \mathrm{P}_{4},(1) \mathrm{LiF}\)

Short Answer

Expert verified
Elements: Cs, S, O; Molecules: SO2, S8, N2O5, O2, O3, CH4, P4; Compounds: SO2, N2O5, CH4, KBr, LiF; Both Compounds and Molecules: SO2, N2O5, CH4.

Step by step solution

01

Identify Elements

Visually inspect each substance given in the exercise and determine if it is an element. An element will consist of only one type of atom. Here, the substances that are elements are: Cs (cesium) and S (sulfur).
02

Identify Molecules

Next, identify the molecules. Molecules are made up of two or more atoms. SO2, S8, N2O5, O2, O3, CH4, P4 are all molecules since they consist of two or more atoms.
03

Identify Compounds

Now, identify the compounds. Compounds are made up of more than one type of atom. The compounds from the given substances are SO2, N2O5, CH4, KBr, and LiF.
04

Identify Both Compounds and Molecules

Finally, determine which substances are both compounds and molecules. To be both, a substance must be made up of more than one type of atom and consist of more than one atom. The substances that satisfy both these conditions are SO2, N2O5 and CH4.

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Most popular questions from this chapter

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