Practice Quiz

SAT II Chemistry Exam Prep

Category - General Chemistry

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Potassium hydrogen carbonate is best classified as which of the following types of matter?
  1. Heterogeneous mixture
  2. Element
  3. Homogeneous mixture
  4. Compound
Explanation
Correct Response: D. Potassium hydrogen carbonate, KHCO3, is a single chemical substance, a compound composed of potassium, hydrogen, carbon, and oxygen. A is incorrect because samples of this compound are uniform in composition throughout. B is incorrect because the compound contains four distinct elements. C is incorrect because KHCO3 is a pure substance rather than a mixture.
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