It is currently 21 Mar 2018, 15:44

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# The rate of certain chemical reaction is directly

Author Message
Manager
Joined: 21 Aug 2008
Posts: 193
The rate of certain chemical reaction is directly [#permalink]

### Show Tags

04 Oct 2008, 10:46
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

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
Manager
Joined: 21 Aug 2008
Posts: 193
Re: PS - Concentration Change [#permalink]

### Show Tags

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

Explanation would be appreciated...and this is from GMATPrep (1st).
Re: PS - Concentration Change   [#permalink] 04 Oct 2008, 11:33
Display posts from previous: Sort by