Worksheet Answers to Study
Worksheet entitled Stoichiometry Practice answers:
1) 4 Al + 3 O2 ---> 2 Al2O3
a) 8.5 mol Al2O3 b) 37.3 g O2
2) Mg + 2 HCl ---> MgCl2 + H2
a) 2.06 g H2 b) 1.92 mol Mg
3) 4 NH3 + 5 O2 ---> 4 NO + 6 H2O
a) 60 g NO b) 54 g H2O
4) Fe3O4 + 4 CO ---> 3 Fe + 4 CO2
a) 24.15 g Fe b) 149.6 g Fe TY 94.45% yield
5) 6 PbO + O2 --->2 Pb3O4
a) 342.8 g Pb3O4 b) 9.14 x 10^25 formula units Pb3O4
6) N2 + 3 H2 ---> 2 NH3
a) 4.8 L NH3 b) 287.5 g N2
7) C5H12 + 8 O2 ---> 5 CO2 + 6 H2O
a) 977.8 g CO2 b) 98.2 g H2O c) 210.94 g H2O 140.625 g C5H12 needed 9.375 g C5H12 left over
8) 2 AgNO3 + CaCl2 ---> 2 AgCl + Ca(NO3)2
a) 11.76 g AgCl b) 0.25 g CaCl2 left over, 4.58 g CaCl2 needed for reaction
Students, you have a plethora of worksheets on mole conversions, limiting reagent problems, and percentage yield. Be sure that you are practicing them.
Friday, November 7, will find us testing over chapter 9 on stoichiometry. Be sure that you are able to convert from grams of one substance to grams of another, as well as the other problems we learned how to do.
We'll do a couple of stoichiometry and limiting reagent labs over the next couple of days as well as continue to work problems. Practice!