West Virginia Barber Written Practice Exam

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What compounds of hydrogen contain metal and oxygen?

Acids
Bases
Emulsions
Solutions

The correct answer is: Acids

Acids are compounds of hydrogen containing a metal and oxygen. In chemistry, acids are defined as compounds that release hydrogen ions (H+) when dissolved in water. These hydrogen ions are bonded to an anion, which can be an oxygen-containing species like sulfate (SO4^2-), nitrate (NO3^-), or carbonate (CO3^2-). Therefore, the correct answer is A. On the other hand, Bases are compounds that release hydroxide ions (OH-) when dissolved in water, and they do not necessarily contain hydrogen, metal, and oxygen together. Emulsions and solutions are not specific types of compounds but rather refer to mixtures of various substances.