1 / 13

Percentage Composition

Percentage Composition. What is percentage composition?. The mass of each element in a compound compared to the entire mass of the compound and multiplied by 100 percent is called the percentage composition of the compound. To calculate percentage composition:.

tranquilla
Download Presentation

Percentage Composition

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Percentage Composition

  2. What is percentage composition? The mass of each element in a compound compared to the entire mass of the compound and multiplied by 100 percent is called the percentage composition of the compound.

  3. To calculate percentage composition: Mass of element X 100 = % Total mass of compound

  4. The percentage composition of a compound tells you the percent of the mass made up by each element of the compound. This can be determined by calculating the molar mass of a given chemical formula.

  5. Calculating percentage composition of a compound: EX: What is the percentage composition of hydrogen and oxygen in H2O? Formula Mass = H= 2 atoms X 1 amu= 2 amu O= 1 atom X 16 amu= 16 amu 18amu Percentage of Hydrogen = 2.0 g H2 18 g H2O X 100 = 11% Percentage of Oxygen = 16g O 18g H20 X 100 = 89% (CHECK: Percentages should equal 100%.)

  6. Calculating mass of an element in a compound: EX: How many grams of oxygen are in 5 g of H2O? __X__ = 16g O 5 g H20 18gH20 (Cross Multiply) 18 x = (16) (5) x = 80 18 x = 4.44 g O

  7. PRACTICE PROBLEMS KNO3

  8. H2SO4

  9. C2H5OH

  10. C6H5NH2

  11. What is the percentage of carbon in CO2?

  12. How many grams of carbon are in 25 g of CO2?

  13. Find the percentage composition of a compound that contains 2.63g of carbon, 0.370g of hydrogen, and 0.580g of oxygen in a 3.58g sample of the compound.

More Related