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Pick Your Poison 27 Aug 2013 | 04:00 pm
Naturally occurring tartaric acid is found in the levo (L-) form (pictured below). If given a sample of optically pure tartaric acid of unknown isomeric form, which laboratory instrument or technique ...
Horse Race 26 Aug 2013 | 04:53 pm
A horse accelerates uniformly from 0 to 20 mi/h in 2 seconds. What is the acceleration? Note: There is a poll embedded within this post, please visit the site to participate in this post's poll. Cor...
Shake and Bake 25 Aug 2013 | 04:23 pm
A racecar travels in a circular path around the Daytona 500 track. The radius of the circular track is doubled and the speed of the car does not change. The required force to maintain the car’s motion...
Switch Hitter 24 Aug 2013 | 04:50 pm
Which one of the following molecule is amphipathic, with both a hydrophilic and hydrophobic region? Note: There is a poll embedded within this post, please visit the site to participate in this post'...
Buffer Buffoon 23 Aug 2013 | 05:17 pm
A student creates a 1M citrate (C3H5O(COO)33-) buffer solution at pH 5.0. He then dilutes the solution to 200 mM, and adds it to his experiment. What is the pH of the 200 mM buffer solution? Note: Th...
Getting Torqued 22 Aug 2013 | 05:15 pm
Water moves through a turbine in a dam, causing it to turn. The force of the water is 300 N, and the radius of the wheel is 20 m. What is the torque around the center of the wheel? Note: There is a p...
The pH Value Is Right 21 Aug 2013 | 06:15 pm
Which set of 1 Molar solutions has the correct pH values? Note: There is a poll embedded within this post, please visit the site to participate in this post's poll. Correct Answer: D. Hydrochloric a...
Otter Future 20 Aug 2013 | 05:01 pm
In a small lake, sea urchins graze upon small grasses that grow on the bottom. After the introduction of an exotic sea urchin, the small grasses became over grazed and absent. To solve the problem, a ...
Phase Changes 19 Aug 2013 | 05:25 pm
Which opposite Phase Changes occur at the same temperature for a pure substance? Note: There is a poll embedded within this post, please visit the site to participate in this post's poll. Correct An...
Endpoint of a Titration 18 Aug 2013 | 06:08 pm
Which of the following is NOT needed to calculate the endpoint of a titration? Note: There is a poll embedded within this post, please visit the site to participate in this post's poll. Correct Answ...
