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chem hw due sept. 6- Spring 2006 - Sparks

chem hw due sept. 6- Spring 2006 - Sparks - Pham Thanh...

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Pham, Thanh – Homework 1 – Due: Sep 6 2006, 11:00 pm – Inst: Stacy Sparks 1 This print-out should have 16 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. The due time is Central time. Make sure you read the student instructions for the homework server! It will explain how to enter numerical answers and the points system of positive and negative points. Remember, you are encouraged to enter your answers a few at a time as you complete them. Do not wait until the night before the assignment is due to enter all your answers! 001 (part 1 of 1) 2 points What percentage of water on the Earth is seawater; hence unfit for drinking? 1. 50% 2. 98% 3. 2% 4. 20% 002 (part 1 of 1) 2 points A solvent is just another name for a solution. 1. False 2. True 003 (part 1 of 1) 2 points 28 g sodium nitrate is dissolved in water to make 450 g of solution. What is the percent sodium nitrate in the solution? Answer in units of%.
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