Limestone (CaCO₃, 100

question 37

Multiple Choice

Limestone (CaCO₃, 100.09 g/mol) is present in many sedimentary rocks.Suppose the limestone in a 5.000 g rock sample is dissolved in hydrochloric acid, and then 33.30 mL of 0.1500 M Na₂C₂O₄ is added to precipitate the Ca²⁺ ions as CaC₂O₄ (128.10 g/mol) .What is the mass percent limestone in the original rock sample?

• A)10.00%
• B)12.80%
• C)17.35%
• D)85.31%
• E)66.67%

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Definitions:

Nominal Group Technique

a structured method for group brainstorming that encourages contributions from all members and seeks to reduce domination by a single member.

Delphi Technique

Involves generating decision-making alternatives through a series of survey questionnaires.

Formal Retreat Approach

A strategic decision-making process to withdraw from certain activities, investments, or engagements to reallocate resources more efficiently.

Formal Retreat Approach

A structured method of withdrawal from a situation, often used as a strategic decision-making process in business or conflict resolution contexts.