A Bar Graph

question 48

Multiple Choice

A bar graph:

• A)is useful when showing what has happened over time.
• B)may be shown by vertical bars to illustrate the comparative sizes of different observations.
• C)is useful when the true direction of causality between two variables is reversed.
• D)shows the percentages of a total amount that can be attributed to various components.

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Definitions:

Substitution

A chemical reaction in which an atom or group of atoms is replaced with a different atom or group of atoms in a molecule.

Specific Rotation

A measure of the degree to which a compound can rotate plane-polarized light, typically expressed in degrees and dependent on concentration, temperature, and wavelength.

Racemization

A process leading to the conversion of an optically active compound into a racemic mixture, where there is an equal proportion of left and right-handed enantiomers.

Substitution

A chemical reaction in which an atom or group of atoms in a molecule is replaced by another atom or group.