What Is the Reaction for the Standard Enthalpy of Formation

question 29

Multiple Choice

What is the reaction for the standard enthalpy of formation for Mn₂O₃(s) ? (Mn(s) is the stable form of manganese.)

• A) Mn(s) + 3/4 O₂(g) → 1/2 Mn₂O₃(s)
• B) MnO(s) + MnO₂(s) → Mn₂O₃(s)
• C) 2 Mn(s) + O₃(g) → Mn₂O₃(s)
• D) 2 MnO(s) + 1/2 O₃(g) → Mn₂O₃(s)
• E) 2Mn (s) + 3/2 O₂ (g) → Mn₂O₃(s)

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Definitions:

Total Return

The overall financial gain or loss on an investment, including both capital appreciation/depreciation and dividends or interest over a given period.

Dividend Yield

A financial ratio that indicates how much a company pays out in dividends each year relative to its stock price.

Capital Gains Yield

The price appreciation component of the total return on an investment, calculated as the change in the price of the investment over a period of time.

Required Rate

A rephrased definition for the Required Rate of Return; it is the least annual percentage earned by an investment that will entice individuals or companies to put money into a particular security or project.