Percent Composition Practice Worksheet
What is Percent Composition?
Percent composition is a way to express the relative amounts of elements in a compound. It is usually expressed as a percentage of the total mass of the compound. For example, if a compound is composed of two elements, one element in a mass of 10 grams and the other in a mass of 15 grams, the percent composition would be 10/25 = 40% for the first element and 15/25 = 60% for the second element.
How to Calculate Percent Composition?
To calculate percent composition, divide the mass of each element in the compound by the total mass of the compound. Then multiply that number by 100 to get the percent composition. For example, if a compound has a total mass of 100 grams and contains 10 grams of oxygen and 90 grams of nitrogen, the percent composition would be 10/100 x 100 = 10% oxygen and 90/100 x 100 = 90% nitrogen.
When to Use Percent Composition?
Percent composition is useful in many areas of chemistry, especially in the study of chemical reactions. It can help you determine the identity of a compound, or how a compound will react with another compound. It can also be used to determine the amount of a certain element present in a compound.
Percent Composition Practice Worksheet
The following worksheet is designed to help you practice calculating percent composition for different compounds. Use the given masses to find the percent composition for each element in the compound.
Practice Worksheet
1. Compound A contains 7.5 g of oxygen and 12.5 g of carbon. What is the percent composition of oxygen in Compound A?
Answer: 7.5/20 x 100 = 37.5% oxygen and 12.5/20 x 100 = 62.5% carbon.
2. Compound B contains 18 g of nitrogen and 12 g of oxygen. What is the percent composition of nitrogen in Compound B?
Answer: 18/30 x 100 = 60% nitrogen and 12/30 x 100 = 40% oxygen.
3. Compound C contains 6 g of hydrogen and 24 g of oxygen. What is the percent composition of hydrogen in Compound C?
Answer: 6/30 x 100 = 20% hydrogen and 24/30 x 100 = 80% oxygen.
4. Compound D contains 9 g of carbon and 21 g of oxygen. What is the percent composition of carbon in Compound D?
Answer: 9/30 x 100 = 30% carbon and 21/30 x 100 = 70% oxygen.
No comments:
Post a Comment