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ChemHMWK3 - Weinelt Karl Homework 3 Due midnight Inst Donna...

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Weinelt, Karl – Homework 3 – Due: Sep 28 2003, midnight – Inst: Donna Lyon 1 This print-out should have 25 questions, check that it is complete. Multiple-choice questions may continue on the next column or page: find all choices before making your selection. The due time is Central time. This assignment is due Sunday, Sept. 28 by midnight. 001 (part 1 of 1) 10 points Of the following combinations of com- pounds/names, the one which is incorrect is ? . 1. P 2 Cl 4 /diphosphorous tetrachloride 2. Li 2 O /dilithium oxide 3. MgCl 2 /magnesium chloride 4. BF 3 /boron trifluoride 5. MgS/magnesium sulfide 002 (part 1 of 1) 10 points The formula for phosphate is: 1. PO 3 - 2 2. PO 3 - 4 3. P 3 - 4. SCN - 5. PhO - 6. PO 3 - 3 003 (part 1 of 1) 10 points How many oxygen atoms are present in a formula unit of sodium carbonate? 1. 3 2. 4 3. 2 4. 5 5. 1 004 (part 1 of 1) 10 points A compound is found to be 26.95% sulfur, 13.43% oxygen, and 59.61% chlorine by mass. What is the simplest formula of the com- pound? 1. SOCl 2. SO 2 Cl 2 3. SOCl 2 4. SO 2 Cl 5. S 2 OCl 2 005 (part 1 of 1) 10 points A 1.50 g sample of a compound containing only C, H and O was burned in an attempt to determine its simplest formula. 3.00 g of CO 2 and 1.23 g of H 2 O were collected. Find the simplest formula for the com- pound. 1. C 3 H 5 O 2 2. C 2 H 4 O 3. C 2 H 6 O 4. C 3 H 6 O 5. Impossible to determine.
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