1hw - 1 HOMEWORK #1 Multiple Choice Identify the choice...

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1 HOMEWORK #1 Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 1. Air is best classified as a. an element b. a compound c. a homogeneous mixture d. a heterogeneous mixture ____ 2. A marble tabletop is best classified as a. an element b. a compound c. a homogeneous mixture d. a heterogeneous mixture ____ 3. 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 ____ 4. Which statement best describes N 2 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 ____ 5. 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
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2 ____ 7. 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.
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1hw - 1 HOMEWORK #1 Multiple Choice Identify the choice...

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