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Classifying matter
1. Vanillin contains 63.15% C, 5.30% H, and 31.55% O whether it is extracted from vanilla beans, synthesized chemically from clove oils, or extracted from wood pulp wastes. Vanillin is most likely to be:
a solution of C in H and Oa heterogeous mixture of elements
a compound of C, H, and Oa homogenous mixture of elements
2. A blue crystalline material is heated strongly in a test tube. A clear liquid condenses around the mouth of the tube and the crystals gradually lose their blue color and become white powder. Every gram of blue crystal produces 0.36 g of clear liquid and 0.64 g of colorless powder. The same weight relationships are observed for samples of the crystals taken from many different sources. These observations are consistent with the hypothesis that the blue crystals are:
a compounda solutionan elementa heterogeous mixturea wet salt
3. Antoine Lavoisier, the "father of chemistry", listed lime as a chemical element in his table of 33 known elements. Which of the following observations shows that lime cannot be an element?
Lime reacts with water, generating a large amount of heat.
Lime melts at a temperature of 2572°C.
When a certain soft metal is burned in oxygen, lime is produced (with no other products).
Lime and carbon dioxide are produced when limestone is roasted.
4. Smoke is an example of a(n):
homogeneous mixture elementheterogeneous mixture gaseous solution compound
5. The meteorite ALH84001 contains tiny bubbles of gas trapped in the rock. The chemical composition of the gas in these bubbles matches the composition of the Martian atmosphere as determined by Viking spacecraft in the 1970's. The meteorite is an example of a(n)
binary compoundheterogeneous mixturesolutionelementhomogeneous mixture
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General Chemistry Online! Classifying matter

Copyright © 1997-2005 by Fred Senese
Comments & questions to fsenese@frostburg.edu
Last Revised 07/25/05.URL: http://antoine.frostburg.edu/chem/senese/101/matter/classify-matter-quiz.shtml