Before the 20th Century, the Average Workweek Was How Long

question 17

Multiple Choice

Before the 20th century, the average workweek was how long?

• A) the same as after the 20th century
• B) longer than after the 20th century
• C) shorter than after the 20th century
• D) none of the above

---

Definitions:

pH

A scale used to specify the acidity or basicity of an aqueous solution, ranging from 0 (acidic) to 14 (basic).

Buffer Solution

A solution that can resist changes in pH when small quantities of an acid or base are added, maintaining a relatively constant pH.

pH

A measurement system that identifies whether an aqueous solution is acidic or alkaline, with values extending from 0 (indicative of acidity) to 14 (signifying basicity).

Components

Individual parts or substances that constitute a composite material or mixture.