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Stockmoose16
- Master | Next Rank: 500 Posts
- Posts: 347
- Joined: Mon Aug 04, 2008 1:42 pm
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This problem has been dealt with a few times on this board, but I'm confused with the formula that people come up with...
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 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?
A) 100% decrease
B) 50% decrease
C) 40% decrease
D) 40% increase
E) 50% increase
From the information in the problem I get:
R= 1/B
or
R = A^2
which means: A^2= 1/B
Everyone who's answered the question says the ratio should be:
R= A^2/B
Where is the formula coming from? The question clearly says that R is equal to the inverse of B, and it's also equal to A^2. So how do we come up with A^2/B.
OA is D
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 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?
A) 100% decrease
B) 50% decrease
C) 40% decrease
D) 40% increase
E) 50% increase
From the information in the problem I get:
R= 1/B
or
R = A^2
which means: A^2= 1/B
Everyone who's answered the question says the ratio should be:
R= A^2/B
Where is the formula coming from? The question clearly says that R is equal to the inverse of B, and it's also equal to A^2. So how do we come up with A^2/B.
OA is D
