Assignment Lect 6 - Chemistry Past Paper

Assingment Lect 6 1- When C~3~H~8~ burns in oxygen, CO~2~ and H~2~O are produced. If 15.0 g of C~3~H~8~ reacts with 60.0 g of O~2~, how much CO~2~ is produced? 2- When copper is heated with an excess of sulfur, copper(I)sulfide is formed. In a given experiment, 1.50 g copper was heated with excess...

Assingment Lect 6 1- When C~3~H~8~ burns in oxygen, CO~2~ and H~2~O are produced. If 15.0 g of C~3~H~8~ reacts with 60.0 g of O~2~, how much CO~2~ is produced? 2- When copper is heated with an excess of sulfur, copper(I)sulfide is formed. In a given experiment, 1.50 g copper was heated with excess sulfur to yield 1.76 g copper(I) sulfide. What is the theoretical yield? What is the percent yield?(Cu=63.54, S =32) 3. 2Al + 6HCl → 2AlCl~3~ + 3H~2~ If 25 g of aluminum was added to 90 g of HCl, what mass of H~2~ will be produced? 4. N~2~ + 3H~2~ → 2NH~3~: If you have 20 g of N~2~ and 5.0 g of H~2~, which is the limiting reagent? 5. What mass of aluminum oxide is formed when 10.0 g of Al is burned in 20.0 g of O~2~? When C~3~H~8~ burns in oxygen, CO~2~ and H~2~O are produced. If 15.0 g of C~3~H~8~ reacts with 60.0 g of O~2~, how much CO~2~ is produced 6- When N~2~ and 5.00 g of H~2~ are mixed, the reaction produces 16.0 g of NH~3~. What is the percent yield for the reaction? N~2~(g) + 3H~2~(g) → 2NH~3~(g) **Define** **Limiting Reagent , Theoretical yield and Percentage yield**