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

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