The rate of a certain chemical reaction is directly proportional to the concentration of chemical A present and inversely proportional to the concentration of chemical B present. If the concentration of chemical B present is increased by 50 percent, which of the following is closest to the percent change in the 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) 30% increase E) 60% increase
Let's say here is the formula of how A and B affects the reaction speed:   rate = A/B   After the concentration B is increased by 50%, the percentage of B   become 1.5B, to keep 'rate' the same, need to have 1.5A.   Which means A increased by 50%   Answer : 50% decrease
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The rate of a certain chemical reaction is directly proportional to the concentration of chemical A present and inversely proportional to the concentration of chemical B present. If the concentration of chemical B present is increased by 50 percent, which of the following is closest to the percent change in the the concentration of chemical A required to keep the reaction rate unchanged.