When Mixed, Solutions of Aluminum Nitrate, Al(NO₃)₃, and Ammonium Carbonate

question 75

Multiple Choice

When mixed, solutions of aluminum nitrate, Al(NO₃) ₃, and ammonium carbonate, (NH₄) ₂CO₃, will form a precipitate of aluminum carbonate, Al₂(CO₃) ₃. The balanced equation is 2Al(NO₃) ₃(aq) + 3(NH₄) 2CO₃(aq) → Al₂(CO₃) ₃ (s) + 6NH₄NO₃(aq) Which of the following statements regarding this reaction is incorrect?

• A)2 moles of Al(NO₃)₃ will react with 3 moles of (NH₄)₂CO₃.
• B)If 6 moles of (NH₄)₂CO₃ react with sufficient Al(NO₃)₃, 2 moles of Al₂(CO₃)₃ should form.
• C)If 0.5 mole of (NH₄)₂CO₃ react with sufficient Al(NO₃)₃, 3 moles of Al₂(CO₃)₃ should form.
• D)If 1.5 moles of Al₂(CO₃)₃ are formed, given sufficient starting materials, then 9 moles of NH₄NO₃ should also form.
• E)4 moles of Al(NO₃)₃ will react with 6 moles of (NH₄)₂CO₃.

Differentiate between periodic and perpetual inventory accounting systems.

Define and explain inventory valuation and reporting for merchandising companies.

Describe the purchasing and sales transaction recording processes in a perpetual inventory system.

Understand the closing entries process for merchandising companies.

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Definitions:

Independent Variable

A variable in statistical modeling that is manipulated or categorized to observe its effect on a dependent variable.

Stepwise Regression

An approach to constructing regression models where the selection of predictor variables is performed automatically.

Dependent Variable

A variable in an experiment or model that is expected to change in response to manipulations of independent variables.

Building Model

The process of creating a mathematical, statistical, or computational representation of a real-world scenario for the purpose of analysis or prediction.