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Unformatted text preview: Bonus/Replacement HW#1 (Homework) BARAKAT FARRIS CH101, section 003, Fall 2008 Instructor: Lori Petrovich Web Assign Current Score: 0 out of 5 Due: Thursday, September 11, 2008 11:59 PM EDT Description Exam 1 is on Friday, September 12, 2008 You can practice for Exam 1 and use this assignment to replace an earlier assignment you may have scored low on or a later assignment you may miss due to sickness, etc. Remember that Exam 1 is on paper, and you'll only have 1 "submission". Disclaimer: Practice exams will only get you so far. Some exam questions that were not asked during a previous semester may be asked this semester. Your best strategy is to study for the exams by reviewing your webassign homework assignments, taking a practice exam or two, and then re-studying those concepts you did not do well on in the practice. Instructions The question submission scoring is as follows: Correct on first submission: full points Correct on second submission: full points Correct on third submission: full points Correct on fourth submission: 90% of points Correct on fifth submission: 80% of points Do NOT press 'submit all questions" when you are finished. This will do exactly as indicated, and submit all questions, reducing your score. The due date for this assignment is past. Your work can be viewed below, but no changes can be made. 1. --/0.25 points | 0/5 submissions Rank the following samples in mass, from least to greatest . Your response should be a four letter "word" made up of the letters a, b, c and d. For example, if you think a is the lightest, followed by b, c and d (heaviest), your response should be the word abcd (lower case, no spaces, no commas). a) 2 moles of N 2 b) 1 mole of KCl c) 9 x 10 23 CO 2 molecules Bonus/Replacement HW#1 http://www.webassign.net/v4cgifbaraka@ncsu/student.pl?l=20... 1 of 11 12/14/08 3:13 AM d) 2 moles of LiF (No Response) dacb 2. --/0.25 points | 0/5 submissions Assume the reaction of 24.03 g of O 2 in the following reaction to determine the other quantities. 3O 2 + 4Fe -> 2Fe 2 O 3 moles of O 2 reacting = (No Response) 0.751 mol moles of Fe required = (No Response) 1.001 mol moles of Fe 2 O 3 formed = (No Response) 0.501 mol mass of Fe 2 O 3 formed = (No Response) 80.010 g 3. --/0.25 points | 0/5 submissions How many moles of CF 4 can be produced when 6.00 mol C react with 2.00 mol F 2 ? (No Response) 1.00 mol CF 4 How many moles of each reactant are left over? Note that at least one must disappear. (No Response) 5.00 mol C remain (No Response) 0.00 mol F 2 remain 4. --/0.25 points | 0/5 submissions Bonus/Replacement HW#1 http://www.webassign.net/v4cgifbaraka@ncsu/student.pl?l=20......
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This note was uploaded on 01/25/2011 for the course CH 101 taught by Professor Bigham during the Spring '08 term at N.C. State.
- Spring '08