1.  For every one million pounds of fertilizer manufactured at Bigearth, Inc., about500pounds are ruined by being accidentally left out in the rain. Last month,100pounds 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.

 2.  According to the instructions for a chemical procedure, Brian mixed salt, baking soda and water in a2:3:20ratio by mass. How many grams of water would be required to make a mixture that contained24grams of salt?


3.  In a mixture of CaCO3 and C_{un/a}SO_{4}the ratio of C_{un/a}CO_{3}to C_{un/a}SO_{4}molecules is7to3. If there are21billion molecules of C_{un/a}SO_{4}, how many total molecules are in the mixture?

 4.  Jordan worked overtime at the lab to perform a chemical analysis on some sludge of unknown composition. She found it to be23.2% water by mass. If she completely dried a138g (original mass) of the sludge, how much water was removed in the drying process? Round your answer to the nearest hundredth.


5.  The ratio of iron atoms to chromium atoms in a water sample from the treatment pond at ZGlobe is11to5. If there are194chromium 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.

 6.  * Esta es una hoja prehecha. Utilice el enlace arriba de la página para un imprimible. 
