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The rate of certain chemical reaction is directly

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Manager
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The rate of certain chemical reaction is directly [#permalink]

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New post 04 Oct 2008, 10:46
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The rate of certain chemical reaction is directly proportional to the square of the concentration of chemical A present and inveresely proportional to the concentration of chemical B present. If the present of the chemical B is increased by 100%, which of the following is the closest to the percent change in the concentration of chemical A required to keep the reaction rate unchanged?

1. 100% decrease
2. 50% decrease
3. 40% decrease
4. 40% decrease
5. 50% decrease

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Joined: 21 Aug 2008
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Re: PS - Concentration Change [#permalink]

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New post 04 Oct 2008, 11:33
stallone wrote:
40% increase


Explanation would be appreciated...and this is from GMATPrep (1st).

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Re: PS - Concentration Change   [#permalink] 04 Oct 2008, 11:33
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The rate of certain chemical reaction is directly

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