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The reaction A(aq) + B(aq) → Products(aq) was studied, and the following data were obtained: [A]0...

The reaction

A(aq) + B(aq) → Products(aq)

was studied, and the following data were obtained:

[A]0 (mol/L) [B]0 (mol/L) Initial rate (mol/L•s)
0.080 0.12 5.61×10-2
0.040 0.080 1.87×10-2
0.020 0.060 7.01×10-3
0.16 0.060 5.61×10-2


The order of the reaction in B is ______.

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