8. Using the balanced reaction shown below: C3H4 (g) + 3O2 ? 2CO2(g) + 2H20(1) H

Question

8. Using the balanced reaction shown below: C3H4 (g) + 3O2 ? 2CO2(g) + 2H20(1) How many moles of oxygen are required to form 12 moles of CO2 in the presence of excess C2H4? ? a 18 moles LR O2 h, 12 moles 12 CO2 ? 12 C & 24 sLeSY,98 moles loC2H? +16 O2-> 12 CO 2 t 12 H2O 9 (a, 16 moles 9. Using the balanced reaction shown below: NOT BALAN CED 2H2(g) + O2(g) ? 2H2O(1) "How many moles of water are formed when 28 moles of q hydrogen are combusted in the presence of excess oxy- 39 gen? a. 14 moles c. 56 moles e. None of the above .23m 28 moles 28 H 7 moles 2H2 +H02 328 H20 28 H2 + O2 ? 14H2O

Explanation / Answer

Ans 8

The balanced reaction

C2H4 + 3O2 = 2CO2 + 2H2O

2 mol CO2 produced from = 3 mol O2

12 mol CO2 produced from = 3 x 12/2 = 18 mol O2

Option A is the correct answer

Ans 9

The balanced reaction

2H2 + O2 = 2H2O

2 mol H2 produces = 2 mol H2O

28 mol H2 produces = 28 mol H2O

Option B is the correct answer

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