Which Is Not a Pure Substance

question 76

Multiple Choice

Which is not a pure substance?

• A)helium
• B)copper wire
• C)air
• D)sucrose

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Definitions:

World War II

A global conflict that lasted from 1939 to 1945, involving most of the world's nations and marked by significant battles, genocide, nuclear bombings, and the Holocaust.

Divorce Rate

The statistical measure of the number of divorces that occur in a given population during a specified period.

New Deal

A series of programs, public work projects, financial reforms, and regulations enacted by President Franklin D. Roosevelt in the United States during the 1930s in response to the Great Depression.

Totalitarianism

A political system in which the state recognizes no limits to its authority and strives to regulate every aspect of public and private life wherever feasible.