Chemistry Question Help Please?
2017-09-27 1:44 am
Acetic acid (HC2H3O2) is the active ingredient in vinegar. Calculate the mass percent composition of oxygen in acetic acid.
回答 (1)
2017-09-27 1:51 am
Consider 1 mole of acetic acid (HC₂H₃O₂).
Mass of 1 mole of HC₂H₃O₂ = (1.0×4 + 12.0×2 + 16.0×2) g/mol = 60.0 g/mol
Mass of O atoms in 1 mole of HC₂H₃O₂ = 16.0×2 g/mol = 32.0 g/mol
Mass percent composition of oxygen in HC₂H₃O₂ = (32.0/60.0) × 100% = 53.3%
Mass of 1 mole of HC₂H₃O₂ = (1.0×4 + 12.0×2 + 16.0×2) g/mol = 60.0 g/mol
Mass of O atoms in 1 mole of HC₂H₃O₂ = 16.0×2 g/mol = 32.0 g/mol
Mass percent composition of oxygen in HC₂H₃O₂ = (32.0/60.0) × 100% = 53.3%
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