Which of the following is a mixture?*1 pointA) Pure waterB) AirC) Sodium chloride (table salt)D) Hydrochloric acid (HCl)
Question
Which of the following is a mixture?*1 pointA) Pure waterB) AirC) Sodium chloride (table salt)D) Hydrochloric acid (HCl)
Solution
The answer is B) Air.
Here's why:
A) Pure water is not a mixture because it contains only one type of molecule - H2O.
B) Air is a mixture because it contains various types of molecules such as nitrogen, oxygen, carbon dioxide, and others.
C) Sodium chloride (table salt) is not a mixture because it is a compound, which means it is made up of two or more elements that are chemically combined.
D) Hydrochloric acid (HCl) is not a mixture because it is a compound, which means it is made up of hydrogen and chlorine that are chemically combined.
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