PS11 is available.
IN PS10.8 the last bit of the problem is missing. Something c.... Anyway what is missing is the name of the compound. You may have already figured it out from the way the question is worded, but I want to know how many grams of ammonia are needed to prepare 3.5 metric tons of ammonium sulfate.
In PS10.4d it asks how many moles of chromium phosphate are formed. You should consider how many moles are formed based on the amounts of chromium and phosphoric acid reacting in part c of the question.
Watch out for PS10.6, if you are not careful reading the problem you may do it wrong. READ the question carefully!!!
Problem Set 9 answers are available as is PS10.
Stoichiometry and limiting reagents can be extremely varied and challenging. There are many different possible problems and unless you have done many problems you may make some errors. I strongly recommend you practice doing many problems so you feel comfortable with this material.
The A&S WebMaster says the problems have been worked around. So the A&S Grades DataBase should be working. If you have problems let me know. Remember for the most recent, updated, grades check the Plan B link.
I'm having a number of students contacting me about missing class and wanting to turn in problem sets. I will not accept late problem sets! Since at least one problem set (hopefully more) will be dropped there are no exceptions. Problem Sets are due at the beginning of class. If you are going to miss class when a problem set is due, and you are out of town, I will accept a mailed problem set as long as the postmark is the same as the day the problem set is due. Also remember your problem set must be turned in during the lecture session you are enrolled in.
One of the TA's visited me this morning expressing concern about Problem Set #2 which he had completed grading. He asked what he was to do with a student who had copied the answers from another student and turned in the paper. I indicated copying someone else's work and submitting it with your name is a case of academic misconduct and to give BOTH students a zero on the Problem Set. Please...you are encouraged to work together, but write your own answers to the problem on the problem sets. If anyone has questions about this policy please see me.
I've got the Free Tutoring schedule linked. Check it out for times during the day/week when chemistry teaching assistants will be able to answer questions in B023 of the Physical Sciences building.
For information to help solve Problem 2.1 try using the Merck Index which is available in my office and in the Library. I've placed the Library's copy on Reserve. It should be available to checkout for no more than 2-hours beginning late Saturday or early Sunday. The Merck Index provides useful information arranged alphabetically by compound name. Each compound listing has information like physical properties, solubility and reactivity. Some of the information provided for each substance uses abbreviations. Check the front of the Index for a listing of the abbreviations.
I just talked with Barbara Miller in the Library and she indicates that the Internet computers in the Library should have the Shockwave plugin so that you will be able to run the animations which I run in class. However, students can not print from these computers. The PETE computers do not have the plugin for the animations. The best time to use the Library's Internet computers is before 10 a.m. or after 11 p.m.
Remember laboratories are meeting this week. If you missed laboratory last week you will need to view the safety videotape this week. This week is Check-in...do not lose your locker key!
Print your own copy of the CHEM 1215 Syllabus and General Information.
Need a periodic table link? Check this one out. Oh...BTW please memorize the spelling of the first twenty elements in the periodic table, plus some of the common elements with atomic numbers greater than 20.
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