The second-order decomposition of HBr has a rate constant of 1.80×10-3 M-1 s∙ -1. How much HBr remains after 27.3 s if the initial concentration of HBr is 4.78 M? (A) 4.55 M (B) 0.258 M (C) 3.87 M (D) 2.20 M (E) 2.39 M
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