In a high-temperature reaction, hydrogen bromide and oxygen combine to produce water and bromine.
4HBr(g) + O2(g) ⭢ 2H2O(g) + 2Br2(g)
The rate expression was determined by experiment to be
Rate = k[HBr] [O2]
In one experiment in which the concentrations of both reactants were 0.250mol L-1, the rate was found to be 6.54 X 10-3mol L-1 s-1
Calculate the value of k with appropriate units.
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