1. The simplest chemical substances are composed of only _____ type(s) of atom.0123
2. Compounds can only be separated into their component elements by _____.
- breaking chemical bonds
- removing impurities
- breaking element bonds
3. A _____ is composed of visibly distinguishable parts and does not have uniform composition.
- homogeneous mixture
- heterogeneous mixture
4. _____ is an example of a homogeneous mixture.
- Apple juice
- Oil and vinegar dressing
5. In salt water, water (H2O) is the _____ and salt (NaCl) is the _____.
- solute; solvent
- solvent; solute
6. When both a solute and solvent are solids, they are said to be either miscible or immiscible.
7. Solubility is described in terms of both concentration and temperature.
8. _____ is a kinetic process defined by rate, and is not specific to concentration.
9. Chemists have developed the general rule "like dissolves like" for determining solubility.
10. Consider two substances: Substance A is soluble in a range of temperatures and Substance B is only soluble in hot water. When temperature is low and the two are mixed together, they will most likely creates _____ mixture; when temperature is high and two are mixed together, they will most likely creates _____ mixture.
- homogeneous; heterogeneous
- heterogeneous; homogeneous
11. A sample of solid iron and sand can be most easily separated using a _____.
- piece of tape
- bare hand
12. To calculate the percent of a total mixture, divide the mass of _____ by the mass of _____ and multiply by 100%.
- one substance; the mixture of solids
- the mixture of solids; one substance
13. Salt and benzoic acid in an aqueous solution can be separated with ice and filter paper.
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