問題詳情

73. When the equation

 (basic solution) is balanced using the smallest whole-number coefficients, the coefficient of OH is:
(A)l
(B)2(Q3
(D)4
(E)6

參考答案

答案：E
難度：適中0.666667
統計：A(0),B(1),C(0),D(0),E(2)