Interpretation: The molecular formula of the Terephthalic acid is to be determined.
Concept Introduction: Mole concept is the method used to define the amount of a compound and the value of 1 mole is
The expression for molecular mass is as follows:
Here,
The expression for moles of solute is as follows:
Answer to Problem 113A
The molecular formula of the Terephthalic acid is
Explanation of Solution
Given, Amount of carbon present is
Amount of hydrogen present is
Amount of oxygen present is
The molecular mass of Terephthalic acid is
Consider the percentage mass of atoms are given for
of terephthalic acid is calculated as follows:
The expression for number of atoms in the compound is as follows:
Substitute
Substitute
Substitute
Thus, the molecular formula of the Terephthalic acid is
Thus, the molecular formula of the Terephthalic acid is
Chapter 16 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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