Terephthalic Acid, Used in the Production of Polyester Fibers and Films

question 47

Multiple Choice

Terephthalic acid, used in the production of polyester fibers and films, is composed of carbon, hydrogen, and oxygen. When 0.6943 g of terephthalic acid was subjected to combustion analysis it produced 1.471 g CO₂ and 0.226 g H₂O. If its molar mass is between 158 and 167 g/mol, what is its molecular formula?

• A)C ₄H ₆O ₇
• B)C ₆H ₈O ₅
• C)C ₇H ₁₂O ₄
• D)C ₄H ₃O ₂
• E)C ₈H ₆O ₄

---

Definitions:

MRP II

Stands for Manufacturing Resource Planning, an integrated method of operational and financial planning for manufacturing companies, improving overall production efficiency.

Forecasting

The practice of making predictions about future events or trends based on historical data and analysis, often used in planning and decision-making processes.

Replenishment Plans

Strategies or methods used to determine when and how much inventory should be restocked.

Delphi Technique

A forecasting method that relies on a panel of experts answering questionnaires in two or more rounds to reach a consensus on the predictions for future events.