We did an example problem for Colby and talked about the chart of ways stoichiometry problems can be asked. Two bits of homework tonight: HW7 is p. 321-322 #26-30, and HW8 are these four problems.
15. When heated, sodium bicarbonate, NaHCO3, decomposes into sodium carbonate, Na2CO3, water, and carbon dioxide. If 5.00g of NaHCO3 decomposes, what is the mass of the carbon dioxide produced?
16. A reaction between hydrazine, N2H4, and dinitrogen tetroxide, N2O4, has been used to launch rockets into space. The reaction produces nitrogen gas and water vapor.
a. Write a balanced chemical equation for this reaction.
b. What is the mole ratio of N2O4 to N2?
c. How many moles of N2 will be produced if 20,000 mol of N2H4 are used by a rocket?
d. How many grams of H2O are made when 450. Kg of N2O4 are consumed?
17. Joseph Priestly is credited with the discovery of oxygen. He produced O2 by heating mercury (II) oxide, HgO, to decompose it into its elements. How many moles of oxygen could Priestly have produced if he had decomposed 517.84 g of mercury oxide?
18. Iron (III) chloride, FeCl3, can be made by the reaction of iron with chlorine gas. How much iron, in grams, will be needed to completely react with 58.0 g of Cl2?
Have a good night.
This website helps you practice stoichiometry.
ReplyDeletehttp://chemistry.csudh.edu/lechelpcs/genstoichiometrycsn7.html
Problems to help explain the limiting reagent
ReplyDeletehttp://www.chem.lsu.edu/lucid/tutorials/lim.htm
This is a website that helps explain stoichiometry http://www.shodor.org/unchem/basic/stoic/index.html
ReplyDeletehere is a good website on moles and mole ratios:
ReplyDeletehttp://www.dbooth.net/mhs/chem/moles.html
There is a slight possibility that we may have a test over chapters 8 and 9 on friday...i know what your thinking, but we need to start studying now
ReplyDeletehttp://www.chem.lsu.edu/lucid/tutorials/lim.htm
ReplyDeleteHelps with problems involving the limited reagent
This site explains limiting reactants
ReplyDeletehttp://www.mikeblaber.org/oldwine/chm1045/notes/Stoich/Limiting/Stoich07.htm
help ful site if you are having trouble with stoichiometry
ReplyDeletehttp://en.wikipedia.org/wiki/Stoichiometry
stoichiometry
ReplyDeletehttp://chemed.chem.purdue.edu/genchem/topicreview/bp/ch3/massmolframe.html
Here's a worksheet on balancing equations and some questions with stoichiometry.
ReplyDeletehttp://misterguch.brinkster.net/summer4.pdf
Heres a site for practice problems for stoichiometry.
ReplyDeletehttp://academic.evergreen.edu/curricular/matterandmotion/chem_phys%5Cpractice_problems.htm
http://74.125.47.132/searchq=cache:NqOg_vMXdeoJ:www.grossmont.edu/martinlarter/chemistry141/worksheets%2520141/LIMITING%2520REAGENT%2520Practice%2520Problems.doc+practice+limiting+reagent+problems&cd=2&hl=en&ct=clnk&gl=us&client=safari
ReplyDeleteSome practice problems for limiting reagents with answers.
page 317 in the book is very helpful for the book problems
ReplyDeletehttp://www.algebralab.org/practice/practice.aspx?file=Algebra_StoichiometryMoletoMoleConversions.xml
ReplyDeletehas a bunch of quick mole to mole ratio problems for some extra practice
http://www.shodor.org/unchem/basic/stoic/index.html
ReplyDeleteHere is a good site for stoichiometry
this is a website for mass to mole conversion reactions
ReplyDeletewww.ausetute.com.au/molreact.html
Good site on mole ratios:
ReplyDeletehttp://www.occc.edu/KMBailey/Chem1115Tutorials/Molar_Ratios.htm