Question

A major textile dye manufacturer developed new yellow dye. The dye has a percent composition of 75.9 5% C, 17.72% N

and 6.33% H by mass with the molar mass of about to 240 g/mol. Determine the molecular formula of the dye.

Answer 1

Such molecule must have molecular formula of C15N3H15

Step-by-step explanation:

Mass of carbon in such molecule

`0.7595*240_(g/mol) =182.28_(g C/mol)`

The atomic mass of carbon is 12.01 g/mol, so in 182.28 g of carbon there is 15.18 mols of carbon.

Mass of Nitrogen in such molecule

`0.1772*240_(g/mol) =37.73_(g C/mol)`

The atomic mass of nitrogen is 14.01 g/mol, so in 42.53g of nitrogen there is 3.04 mols of nitrogen.

Mass of Hydrogen in such molecule

`0.0633*240_(g/mol) =15.19 {g C/mol}`

The atomic mass of Hydrogen is 1.00 g/mol, so in 15.19 g of Hydrogen there is 15.19 mols of Hydrogen.

Such molecule must have molecular formula of C15N3H15