1. What is the percent composition of sulfur in SO2?
A. 12%
B. 20% C. 50% D. 60%
2. What is the percent composition of oxygen in phosphoric acid, H3PO4?
A. 45.8% B. 52.5% C. 65.3% D.72.5%
3. One gram of tin metal burns in oxygen and forms an unknown tin oxide with a
mass of 1.27 g. What is the percent composition of tin in the oxide that was formed?
A. 21.3% B. 27.0% C. 73.0% D. 78.7%
4. The percent composition of each element in a compound has a total of
A. 100% B. 110% C. 99% D. 109%
5. How much silver is present in 50 g silver nitrate, AgNO,?
A. 31 g B. 31.0g C. 31.76 g D. 31.75 g​