阿摩線上測驗
57. A sample of compound X is subjected to elemental analysis and the following percentages by weight are found: 39.97% C, 6.73% H, and 53.30% O. The molecular weight of X is 90. What is the empirical formula of X?
(A) C6H8O
(B) C2H4O2
(C) C4H10O2
(D) C3H6O3
(E) CH2O
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統計： A(0), B(1), C(1), D(4), E(2) #1072945
統計： A(0), B(1), C(1), D(4), E(2) #1072945
