A Compound Consists of Only Magnesium, Carbon, and Oxygen

question 78

Multiple Choice

A compound consists of only magnesium, carbon, and oxygen. If the percentage by mass of Mg is 28.8% and that of C is 14.2%, what is the percentage by mass of O?

• A) 16.0%
• B) 57.0%
• C) 43.0%
• D) 22.5%
• E) None of the above

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Definitions:

African Americans

An ethnic group in the United States with ancestry traced back to the African continent, especially those whose ancestors were brought to America through the transatlantic slave trade.

Age of Majority

The legally recognized age at which an individual is considered an adult and is responsible for his or her actions, with the ability to enter into legal contracts and enjoy full legal rights and obligations.

Juvenile Court

A court of law responsible for the trial or legal supervision of children under a certain age, typically those who are accused of violating a law.

Equal Protection Clause

A provision in the Fourteenth Amendment of the U.S. Constitution forbidding states from denying any person within its jurisdiction equal protection under the law.