A sample of trifluoroacetic acid, C2HF3O2, contains 40.5 g of oxygen. Calculate the mass of the trifluoroacetic acid sample.?
回答 (2)
2020-04-29 1:18 pm
✔ 最佳答案
Mass fraction of O in C₂HF₃O₂ = (16.0×2) / (12×2 + 1.0 + 19.0×3 + 16.0×2) = 32/114Mass of C₂HF₃O₂ = 40.5 × (114/32) g = 144 g
2020-04-29 1:13 pm
(40.5 g O) / (15.99943 g O/mol) x (1 mol C2HF3O2 / 2 mol O) x
(114.0233 g C2HF3O2/mol) = 144 g C2HF3O2
(114.0233 g C2HF3O2/mol) = 144 g C2HF3O2
收錄日期: 2021-05-01 01:01:47
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