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 concentration of chemical B present. If the concentration of chemical B is increased by 100 percent, which of the following is closest to the percent change in the concentration of chemical A required to keep the reaction rate unchanged?
Choose the correct choice
A) 100% decrease  B) 50% decrease  C) 40% decrease  D) 45% increase  E) 50% increase
CR = (A^2) * ( 1/B)   put any values   625 = 25*25   B increases by 100% so it becomes 50   CR remains same at 625   1/B becomes 50   so A^2 should be    625/50= 
<gadget id="calculator"> 625/50</gadget>
<output>25/2 = around 12.5</output>
12.5 or say decreased by 50%   ANSWER:45% increase
<result>D</result>
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 concentration of chemical B present. If the concentration of chemical B is increased by 100 percent, which of the following is closest to the percent change in the concentration of chemical A required to keep the reaction rate unchanged?