To Prevent the Possibility That a Placebo Effect or Researchers

question 134

Multiple Choice

To prevent the possibility that a placebo effect or researchers' expectations will influence a study's results, scientists employ

• A) control groups.
• B) experimental groups.
• C) random assignment.
• D) the double-blind procedure.

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Definitions:

Reaction Rate

The speed at which reactants are converted into products in a chemical reaction.

Reaction Measurement

The process of quantifying the progress, rate, or yield of a chemical reaction using various methods like spectroscopy, calorimetry, or chromatography.

H2S

Hydrogen sulfide, a toxic, colorless gas with a characteristic odor of rotten eggs, widely found in nature and industrial processes.

Cl2

The chemical symbol for chlorine gas, a diatomic molecule consisting of two chlorine atoms, used in water purification and as a bleaching agent.