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Middle School Math

 

Name _____________________________
Date ___________________
Ratios
Complete.

1.   * This is a pre-made sheet.
Use the link at the top of the page for a printable page.
2.   A sample of steel made at the Bigtown Steel Works, was analyzed and found to contain 0.19% carbon (by mass). How many kilograms of this kind of steel could be made from 1.5 kg of carbon? Round your answer to the nearest hundredth if needed.

3.   The ratio of iron atoms to chromium atoms in a water sample from the treatment pond at Z-Globe is 11 to 4. If there are 206 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.

4.   According to the instructions for a chemical procedure, Sean mixed salt, baking soda and water in a 4:5:21 ratio by mass. How many grams of water would be required to make a mixture that contained 60 grams of salt?

5.   For every five hundred thousand 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.

6.   In a mixture of CaCO3 and CaSO4 the ratio of CaCO3 to CaSO4 molecules is 7 to 5. If there are 50 billion molecules of CaSO4, how many total molecules are in the mixture?


 


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Ratios
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Middle School Math