Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
Promoted
ap chem question?
A mixture was found to contain 1.05 g of silicon dioxide, 0.69 g of cellulose, and 2.17 g of calcium carbonate. Compute the mass percentage of oxygen in the mixture.
1 Answer
Relevance
- electron1Lv 73 years ago
Total mass = 1.05 + 0.69 + 2.17 = 3.91
For SiO2 % = 100 * 1.05 ÷ 3.91 ≈ 26.9
For cellulose % = 100 * 0.69 ÷ 3.91 ≈ 17.6
For CaCO3, % = 100 * 2.17 ÷ 3.91 ≈ 55.5
I hope this is helpful for you.
Still have questions? Get your answers by asking now.