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52.已知SiO2 + 4HF→SiF4(g) + 2H2O,有一石英礦之試料重3克,與過量之氫氟酸反應並加熱,蒸發後重量變為1.8克,試求試料中石英之重量百分率為若干? (Si=28、F=19、O=
問題詳情
52.已知SiO2 + 4HF→SiF4(g) + 2H2O,有一石英礦之試料重3克,與過量之氫氟酸反應並加熱,蒸發後重量變為1.8克,試求試料中石英之重量百分率為若干? (Si=28、F=19、O=16)
(A) 20
(B) 40
(C) 60
(D) 80
參考答案
答案:
[無官方正解]
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