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The rate of a certain chemical reaction is directly [#permalink]
26 Feb 2007, 12:32
The rate of a certain chemical reaction is directly proportional to the square of the concentration of chemical A present and inversely proportional to the concentrationof chemical B present. If the concentration of chemical B is increased by 100 %, which of the following is closet to the percent change in the concentration of chemical A required to keel the reaction rate unchanged?
A)100 % decrease
B) 50 % decrease
C) 40 % decrease
D) 40 % increase
E) 50 % increase