1. Fall 2018 Exam II 1. e 9. e 16. a) 0.48 liters carbon dioxide formed
2 totalpts.
e e 16. a) liters carbon dioxide formed
a c b) grams Na2SO4
d b c) The balloons are the same size. (same moles CO2 produced)
a d a) Hydrogen is limiting. Multiple possible explanations…
b c Fewer than 98.0 grams of nitrogen are needed to form 51.0 g
c c ammonia. Therefore, nitrogen must be excess.
d a b) 9.0 grams hydrogen were present before the reaction.
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 total moles after – 2.0 moles N2 and 3.0 moles NH3).