Which of the Following Species Does Not Have a Standard

question 25

Multiple Choice

Which of the following species does not have a standard enthalpy of formation equal to zero at 25°C?

• A)Cl₂(l)
• B)N₂(g)
• C)Fe(s)
• D)H⁺(aq)
• E)S₈(s)

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Toxic Substances Control Act

A United States law enacted in 1976 designed to regulate the introduction and use of chemicals and toxic substances in the environment.

Clean Air Act

A comprehensive federal law in the United States that regulates air emissions from stationary and mobile sources in order to protect public health and the environment.

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Regulations established by the U.S. Environmental Protection Agency to protect public health and the environment from air pollution.

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A regulatory status limiting the use of certain products, such as chemicals or pesticides, to certified professionals to mitigate risks.