Which of the following illustrations represents a pure substance? Why?

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1 Answer
Jan 29, 2017

Answer:

#"Option C"#

Explanation:

Good question. A pure substance contains only the ONE type of atom or molecule. Pure substances can be elements or compounds.

#A# depicts at least two types of substance, a diatomic molecule, #X_2#, and a heteronuclear diatomic, #AX#; #B# depicts single atoms, and another heteronuclear diatomic; #D# depicts the same as #B#.

For #C#, however, only the one type of heteronuclear diatomic is present. Reasonable examples would include #HX# or #CO#.