TEST BANK FOR PRINCIPLES OF MODERN CHEMISTRY, 8TH EDITION, DAVID W. OXTOBY, H. PAT GILLIS, LAURIE J. BUTLE

Name: Class: Date: Chapter 01 - The Atom in Modern Chemistry 1. Air is best classified as _____. a. an element b. a compound c. a homogeneous mixture d. a heterogeneous mixture ANSWER: c 2. A pure substance that is composed of only one type of atom is best classified as _____. a. an element b. a compound c. a homogeneous mixture d. a heterogeneous mixture ANSWER: a 3. Which statement best describes N2? a. It is an element. b. It is a compound. c. It is a homogeneous mixture. d. It is a heterogeneous mixture. e. Both a & b are correct. ANSWER: a 4. A clear liquid is placed into a beaker and heated until it boils. After all of the liquid has evaporated, a white powder is found in the beaker. The original liquid is best classified as _____. a. an element b. a compound c. a homogeneous mixture d. a heterogeneous mixture ANSWER: c 5. A red solid is heated in an evacuated container until it completely vaporizes. When the vapor cools, it is found to be a sliver liquid. The mass of the silver liquid is less than that of the original solid. The red solid is best classified as _____. a. an element b. a compound c. a homogeneous mixture d. a heterogeneous mixture ANSWER: b 6. A sample of carotene is extracted from a carrot and found to contain 17.9 g of carbon and 2.1 g of hydrogen. A second carotene sample is synthesized in the lab and found to contain 10.0 g of carbon. How many grams of hydrogen are in the second sample? a. 0.021 g b. 0.940 g c. 1.17 g d. 2.00 g