1. 
The ratio of iron atoms to chromium atoms in a water sample from the treatment pond at ZGlobe is 11 to 5. If there are 154 chromium atoms in a liter of the water, how many iron atoms are there in a liter? Round your answer to the nearest whole number if needed.


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

3. 
For every two million pounds of fertilizer manufactured at Bigearth, Inc., about 480 pounds are ruined by being accidentally left out in the rain. Last month, 50 pounds were ruined. Based on this information, estimate how many pounds of fertilizer were manufactured last month. Round your answer to the nearest whole number if needed.


4. 
A sample of steel made at the Bigtown Steel Works, was analyzed and found to contain 0.08% carbon (by mass). How many kilograms of this kind of steel could be made from 2.4 kg of carbon? Round your answer to the nearest hundredth if needed.


5. 
In a mixture of CaCO3 and C_{a}SO_{4} the ratio of C_{a}CO_{3} to C_{a}SO_{4} molecules is 7 to 2. If there are 10 billion molecules of C_{a}SO_{4}, how many total molecules are in the mixture?


6. 
According to the instructions for a chemical procedure, Dylan mixed salt, baking soda and water in a 4:3:24 ratio by mass. How many grams of water would be required to make a mixture that contained 36 grams of salt?

