Chemical Equations Need to Be Balanced Not Only in Terms

question 23

Multiple Choice

Chemical equations need to be balanced not only in terms of the number of atoms, but also by the charge. In other words, just as there should be the same number of atoms before and after the arrow of an equation, there should be the same charge. What set of coefficients is necessary to balance the following chemical equation? ____ + ____ Ag → ____ Sn + ____ Ag⁺

• A)1, 2, 1, 2
• B)1, 1, 1, 2
• C)1, 2, 2, 2
• D)1, 1, 2, 1

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Definitions:

Independent Variables

Factors or conditions that are manipulated or controlled by researchers to determine their effects on dependent variables.

Case History

A detailed account of a person's life and psychological problems, used for analysis or study.

Correlational Study

A research method that examines the relationship between two or more variables without manipulating them.

Demand Characteristics

Subtle cues or signals in an experimental setting that communicate to the participants how they are expected to behave.