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I have 2 questions.   1) Which of the following is the rate at which Br⁻(aq) disappears...

I have 2 questions.  

1) Which of the following is the rate at which Br⁻(aq) disappears in the reaction below if the rate of disappearance of BrO₃⁻(aq) is 2.0 × 10⁻² M/s? BrO₃⁻ + 5 Br⁻ + 6 H⁺ → 3 Br₂ + 3H₂O

2)- The reaction A + B → 2 C has the rate law rate = k[A][B]³. By what factor does the rate of reaction increase when [A] remains constant but [B] is doubled?

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