Molecular Formula Of Serotonin Through Mass Percent Of Its Constituents
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Molecular Formula Of Serotonin Through Mass Percent Of Its Constituents

Serotonin is a compound that conducts nerve impulses in the brain. It contains 68.2 mass percent of carbon (C); 6.86 mass percent of hydrogen (H); 15.9 mass percent of nitrogen (N); and 9.08 mass percent of oxygen (O). Its molar mass is 176 g/mol. Determine its molecular formula.

The strings: S7P2A22 (identity - chemical).

The math:
Pj Problem of Interest is of type identity (chemical).

Amount of carbon in grams = 176(0.682 = 120 g
Amount of hydrogen in grams = 176(0.0686) = 12 g
Amount of nitrogen in grams = 176(0.159) = 28 g
Amount of oxygen in grams = 176(0.0908) = 16 g

Moles of carbon = 120/12 = 10 moles
Moles of hydrogen = 12/1 = 12 moles
Moles of nitrogen =28/14 = 2 moles
Moles of oxygen = 16/16 = 1 mole.
So, empirical formula = C10H12N2O
Empirical mass = molar mass
So empirical formula = molecular formula
So, molecular formula = C10H12N2O.

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