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Concept explainers
Interpretation:
The molecular formula of Lactic acid has to be determined.
Concept Introduction:
The expression to determine molecular weight as per ideal gas equation is given as follows:
Here,
In order to obtain the molecular formula of the compound, Multiply the whole number with the subscript of each element present in the empirical formula.
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Answer to Problem 13.75P
The molecular formula of lactic acid is
Explanation of Solution
The formula to convert degree Celsius to kelvin is as follows:
Substitute
The conversion factor to convert
Thus
The conversion factor to convert
Thus,
The expression to determine molecular weight as per ideal gas equation is as follows:
Substitute
Molecular mass is
The formula to convert mass to moles is as follows:
Substitute
Substitute
Substitute
With moles of
The smallest subscript is 0.033297. So, divide each subscript by 0.033297 as follows:
The expression to calculate the empirical formula mass is as follows:
Substitute
The formula to calculate the whole number multiple is as follows:
Substitute
Multiply the subscripts in
The molecular formula is
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Chapter 13 Solutions
General Chemistry
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