15. Consider the reaction \(^{2}\text{H}_{2} + \text{O}_{2} \rightarrow ^{2}\text{H}_{2}\text{O}\)
What is the ratio of the initial rate of the appearance of water to the initial rate of disappearance of oxygen?
(A)1:1
(B)2:1
(C)1:2
(D)3:2

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