Multiple choice

If water is to compound that what air is to?

  1. Mixture

  2. Gases

  3. Mass

  4. Matter
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Water is a compound (H2O) with fixed chemical composition. Air is a mixture of several gases (nitrogen, oxygen, carbon dioxide, etc.) that are not chemically combined and can vary in proportion. This is the correct analogy: water:compound::air:mixture.

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