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CHAPTER 1 MAKE UP PROBLEMS

CHAPTER 1 MAKE UP PROBLEMS - CHAPTER 1 MAKE UP PROBLEMS 1...

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CHAPTER 1 MAKE UP PROBLEMS 1. Classify each of the following as a pure substance or a mixture. If it is a pure substance, classify it as an element or a compound. If it is a mixture, classify it as homogeneous or heterogeneous. a. sweat b. carbon dioxide c. aluminum d. vegetable soup 2. Classify each of the following changes as physical or chemical. a. Sugar burns when heated in a skillet. b. Sugar dissolves in water. c. A platinum ring becomes dull because of continued abrasion. d. A silver surface becomes tarnished after exposure to air for a long period of time. 3. Perform each of the following temperature conversions. a. 32 o F to o C. b. 77 K to o F c. -109 o F to o C d. 98.6 o F to K 4. Ethylene glycol (antifreeze) has a density of 1.11 g/cm 3 . a. What is the mass in grams of 417 mL of this liquid? b. What is the volume on L of 4.1 kg of this liquid? 5. Indicate the number of significant figures in each of the following numbers. If the number is an exact figure, indicate and unlimited number of significant figures. a. 284,796, 887 (2001 U.S. population)

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