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# The rate of a certain chemical reaction is directly proportional to...

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Intern
Joined: 16 May 2018
Posts: 25
The rate of a certain chemical reaction is directly proportional to...  [#permalink]

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04 Oct 2018, 12:39
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Difficulty:

45% (medium)

Question Stats:

71% (01:46) correct 29% (00:10) wrong based on 7 sessions

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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 chemical 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
Math Expert
Joined: 02 Sep 2009
Posts: 56244
Re: The rate of a certain chemical reaction is directly proportional to...  [#permalink]

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04 Oct 2018, 21:11
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 chemical 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

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Re: The rate of a certain chemical reaction is directly proportional to...   [#permalink] 04 Oct 2018, 21:11
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