A textile dye has the following % composition: 75.95% C 17.72% N 6.33% H If the molar mass of the dye is around 240 g/mol, what steps need to be taken to calculate the empirical and molecular formula?

Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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A textile dye has the following % composition:

75.95% C

17.72% N

6.33% H

If the molar mass of the dye is around 240 g/mol, what steps need to be taken to calculate the empirical and molecular formula?

Expert Solution
Step 1: Writing the given information

A textile dye has the following % composition:

mass % of C = 75.95% = 75.95 g

mass % of N = 17.72% = 17.72 g

mass % of H = 6.33% = 6.33 g

Molar mass of dye = 240 g/mol

Empirical formula = ?

Molecular formula = ?

Note

molar mass of C = 12.0 g/mol

molar mass of H = 1.0 g/mol

molar mass of N = 14.0 g/mol

Empirical formula can be define as the simplest whole number ratio of atoms of the element present in the compound.

 Molecular formula can be define as the actual whole number of atoms of the element present in the compound.

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