homework 1 chem - calles (vec275) Homework 1 Fakhreddine...

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Unformatted text preview: calles (vec275) Homework 1 Fakhreddine (51010) 1 This print-out should have 25 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 10.0 points Which statement is NOT true for a sample of a compound? 1. The sample is homogeneous. 2. The sample contains only one type of substance and cannot be separated into other components without causing a chemical change. 3. The sample melts at a specific tempera- ture. 4. The sample can be separated using the physical properties of ingredients that make up the sample. 5. Each of the elements in the substance occurs in a constant proportion no matter what sample is tested. 002 10.0 points Which of the following is an element? 1. plastic 2. steel 3. glass 4. concrete 5. graphite 003 10.0 points A liquid does not have a constant boiling point, but it looks the same throughout. The liquid is probably a 1. heterogeneous mixture. 2. homogeneous mixture. 3. pure compound. 4. pure element. 004 10.0 points The formula O 3 represents 1. an atom, a compound, and a pure sub- stance. 2. an atom, an element, and a pure sub- stance. 3. an atom, a compound, and a mixture. 4. a molecule, a compound, and a mixture. 5. a molecule, an element, and a pure sub- stance. 6. a molecule, an element, and a mixture. 7. an atom, an element, and a mixture. 8. a molecule, a compound, and a pure sub- stance. 005 10.0 points Calculate the volume in of a ball that has a diameter of 9.3 inches. 1 inch = 2.54 cm (exactly) and = 3.14159. The volume of a sphere is 4 3 r 3 , for radius r . 1. 4 . 95 10 1 cm 3 2. 5 . 52 10 4 cm 3 3. 6 . 9 10 3 cm 3 4. 3 . 37 10 3 cm 3 5. 1 . 21 10 5 cm 3 006 10.0 points A piece of metal has a volume of 0.250 hogsheads and a mass of 54.424 kg....
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This note was uploaded on 10/27/2010 for the course CH 301 taught by Professor Fakhreddine/lyon during the Spring '07 term at University of Texas at Austin.

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homework 1 chem - calles (vec275) Homework 1 Fakhreddine...

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