Upon combustion, a 0.8376 g sample of a compound containing only carbon, hydrogen, and oxygen produces 1.6003 gco2 and 0.9827 gh2o. find the empirical formula of the compound.

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Singleton

Chemistry

16 April, 05:31

Upon combustion, a 0.8376 g sample of a compound containing only carbon, hydrogen, and oxygen produces 1.6003 gco2 and 0.9827 gh2o. find the empirical formula of the compound.

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Dax Zimmerman · Answer 1

Answer is: empirical formula for compound is C₂H₆O.

m (CO₂) = 1,6003 g.

n (CO₂) = m (CO₂) : M (CO₂).

n (CO₂) = 1,6003 g : 44 g/mol.

n (CO₂) = 0,0364 mol.

n (CO₂) = n (C).

m (C) = 0,0364 mol · 12 g/mol = 0,4368 g.

m (H₂O) = 0,9827 g.

n (H₂O) = 0,9827 g : 18 g/mol.

n (H₂O) = 0,0546 mol.

n (H) = 2 · n (H₂O) = 0,1092 mol.

m (H) = 0,1092 mol · 1 g/mol = 0,1092 g.

m (O) = 0,8376 g - 0,4368 g - 0,1092 g = 0,2916 g.

n (O) = 0,2916 g : 16 g/mol = 0,0182 mol.

n (C) : n (H) : n (O) = 0,0364 mol : 0,1092 mol : 0,0182 mol.

n (C) : n (H) : n (O) = 2 : 6 : 1.