The rate of a certain chemical reaction is directly proportional to the square of the concentration of chemical B present and inversely proportional to the concentration of chemical A present. If the concentration of chemical B present is increased by 100 percent, which of the following is closest to the percent change in the the concentration of chemical B required to keep the reaction rate unchanged.  Choose one:
A) 100 % decrease
B) 60% decrease
C) 40% decrease
D) 30% increase
E) 50% increase
Let's say here is the formula of how B and A affects the reaction speed:   rate = B^2/A   After the concentration A is increased by 100%, the percentage of A   become 2A, to keep 'rate' the same, need to have B^2 being doubled.   Which means A increased by 2^(1/2) times.   Answer : 40% decrease
<result>C</result>
The rate of a certain chemical reaction is directly proportional to the square of the concentration of chemical B present and inversely proportional to the concentration of chemical A present. If the concentration of chemical B present is increased by 100 percent, which of the following is closest to the percent change in the the concentration of chemical B required to keep the reaction rate unchanged.