Rate Law Question

Mar 2020
1
0
USA
The reaction, A + 2B ------> products, was being studied. The reagents A and B were mixed and the time interval until a certain quantity of product C accumulated was measured. The data is
run # , [A] , { B } , time, secs
1 , 0.100 , 0.140 , 25
2 , 0.050 , 0.140 , 50
3 , 0.100 , 0.070 , 100


My question is: How do I create the rate law if I don't know the initial rates of each run? Thanks in advance
 
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