GAMT Prep

[CherrieLi]

1.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 the chemical B present . If the concentration of chemical B is increased by 100 persent, which of the following is closest to the percent change in the concentration of chemical of A required to keep the reaction rate unchanged?

A 100% increase

B 50% decrease

C 40% decrease

D 40 % increase

E 50% increase

答案D, 請問是怎麼算的呢?

[a-jan]

refer to ==> http://www.formosamba.com/phpBB3/viewtopi ... l+reaction