answer and explanation
to determine the percentage by mass of N on methyl orange.
We must first calculate the molar mass of methyl orange:
Carbo: 14 x 12.0 = 168
Hydrogen: 14 x 1.00 = 14
Sodium: 1 x 22.0 = 22.0
Nitrogen: 3 x 14.00 = 42
Oxygen: 3 x 15.99 = 47.97
Sulphur: 1 x 32.0 = 32.0
Total Methyl orange molar mass = 327,33 g/mol
Percentage mass of Nitrogen = mass of nitrogen/ mass of methyl orange x 100
42/327.33 x100
= 12.8%