Fall 2018 Exam II 1. e 9. e 16. a) 0.48 liters carbon dioxide formed 2 totalpts. 1. e 9. e 16. a) 0.48 liters carbon dioxide formed a 10. c b) 1.42 grams Na2SO4 d 11. b c) The balloons are the same size. (same moles CO2 produced) a 12. d 17. a) Hydrogen is limiting. Multiple possible explanations… 5. b 13. c Fewer than 98.0 grams of nitrogen are needed to form 51.0 g 6. c 14. c ammonia. Therefore, nitrogen must be excess. 7. d 15. a b) 9.0 grams hydrogen were present before the reaction. 8. c c) Pressure after the reaction is less than the pressure before the reaction. This is because the total number of moles of gas decrease as a result of the reaction (8 total moles before – 3.5 moles N2 and 4.5 moles H2 - compared to 5 total moles after – 2.0 moles N2 and 3.0 moles NH3).