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15 Cards in this Set
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- Back
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In a solution, the substance that does the dissolving is called____. A. soluble B. the solute C. the solvent D. an ion |
Answer: C |
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Water is a good solvent because ______. A. Water is a good solvent because it is a negatively charged ion. B. Water is such a good solvent because it repels most molecules. C. Water is such a good solvent because it is such a small molecule D. Water is a good solvent due to its polarity and small molecular size |
Answer: D |
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A solution that cannot hold any more solute at room temperature would be ______. A. a dilute solution B. a concentrated solution C. a saturated solution D. a supersaturated solution |
Answer: C |
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Ethanol dissolved in water would be an example of ______. A. solution between miscible liquids B. a solution between a solid and liquid C. suspension between liquids D. they do not form a solution |
Answer: |
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To form a supersaturated solution requires______. A. reducing the amount of solute B. reducing the amount of solute C. reducing the amount of solute D. none of the above |
Answer: |
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Which one of the following is an example of a physical change? A. iron rusting B. a steak cooking C. sugar dissolving in water D. a candle burning |
Answer: |
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Which one of the following is not a physical change? A. clothes drying in the dryer B. making a cup of coffee C. chopping wood D. boiling an egg |
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The chemicals after a chemical change______. A. have properties identical to the chemicals before the change. B. have properties different to the chemicals before the change. C. both A and B D. none of the above |
Answer: |
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Heptane is always composed of 84% carbon and 16% hydrogen by mass. What law does this observation illustrate? A. The Law of Multiple Proportions B. The Law of Definite Proportions. C. The Law of Conservation of Mass D. The Law of Conservation of Energy |
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Give the mass number for an atom that has 10 protons, 10 electrons, and 11 neutrons. A. 31 B. 20 C. 10 D. 21 |
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Which conditions will increase the rate of chemical reaction? A. decreased temperature and decreased concentration of reactants B. decreased temperature and increased concentration of reactants C. increased temperature and decreased concentration of reactants? D. increased temperature and increased concentration of reactants? |
Answer: |
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When a lit match is touched to the wick of acandle, the candle begins to burn. When the match is removed, the candle continues to burn. In this reaction, the match ______. A. behaves as a catalyst. B. supplies activation energy. C. part of the rate determining step. D. lowers the activation energy barrier. |
Answer: |
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Compared to a glass of ice water with ice in it, a glass of plain ice-cold water without ice on a warm day will warm up ______. A. faster B. slower C. in the same amount of time D. none of the above |
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If the volume of a gas at a certain pressure is halved, ______. A. its temperature is halved B. its temperature is doubled C. its temperature remains constant D. its temperature increases according to a geometric progression |
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Unless an object at rest is acted upon by a force, it stays at rest due to its ______. A. matter B. inertia C. friction D. gravity |
Answer: |
