1. 
In a chromatography column (basically a long thin tube) there is carbon dioxide flowing at a rate of 10 ml/min. If the maximum flow rate for the column is 158 ml/min, at what fraction of the maximum is the column currently operating? Express your answer as a fraction.


2. 
* This is a premade sheet. Use the link at the top of the page for a printable page. 

3. 
If a solution of MgCl is 2/9 M, what will its concentration be if it is diluted by 13%? Express your answer as a fraction.


4. 
Onefourth of a kilogram of experimental glue was made by Superchem, Inc. The glue was onetenth acrylate X101, threetenths wood glue, and the rest was made up of their regular typeA paper glue. How many kilograms of typeA paper glue were used in this mixture?


5. 
Six moles of silver nitrate followed by three moles of silver chloride are added to a vat containing 50 L of water. Of the silver that was added, what fraction came from the silver nitrate?


6. 
A 500gram package of growth powder made by ZGlobe contains 0.09% yeast extract by mass. What fraction of the powder is not yeast extract?

