In an E-R Diagram, a Line Between Two Entities Represents

question 101

Multiple Choice

In an E-R diagram, a line between two entities represents a(n) ________.

• A)attribute
• B)identifier
• C)cardinality
• D)relationship

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Definitions:

pKa

A quantitative measurement that describes the acidity of a substance, specifically the negative log of the acid dissociation constant (Ka).

Acid Strength

A measure of the propensity of a compound to donate a proton (H+) in an aqueous solution, often quantified by the acid dissociation constant (Ka).

Formic Acid

The simplest carboxylic acid with the chemical formula HCOOH, known for its role in ant stings.

Empirical Formula

The simplest expression of a compound's composition, showing the ratio of elements without structural information.