University:
California State University, Northridge
Course:
CHEM 100 | Principles of Chemistry
Academic year:

2013
Views:

388

Pages:

1
Author:

illettemuxb

Solutions to Chem 100 Work Group Set 4 Questions 1. Classify each of the following as primarily a physical or chemical change. a) rusting of a nail chemical, a new substance is formed b) creating a painting with watercolors physical, no new substance is formed c) dissolving oxygen gas in water physical, no new substance is formed 2. Classify each of the following as a homogeneous or heterogeneous mixture. a) sheet of plastic homogeneous, uniform composition throughout b) very fine playground sand heterogeneous, more than one phase is present c) tapioca pudding heterogeneous, more than one phase is present 3. Classify each of the following as a metal, a nonmetal, a compound, a homogeneous mixture or a heterogeneous mixture. a) hydrogen peroxide compound, two elements present in a definite composition b) leather heterogeneous mixture, more than one phase is present c) vinegar homogeneous mixture, uniform composition throughout 4. Provide the element name or symbol, as appropriate, for each of the following. a) b) c) d) 5. Ba barium Mn manganese arsenic As strontium Sr Provide the name or formula, as appropriate, for each of the following. a) b) c) d) silver carbonate Ag2CO3 Co(OH)2 cobalt(II) hydroxide CaSO3 calcium sulfite potassium permanganate KMnO4

Solutions to CHEM 100 Test Questions

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