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11 Cards in this Set
- Front
- Back
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What are some clues that a chemical reaction has occurred?
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-color change
-solid forms -bubbles form -energy change -gas released -precipitate formed -odor given off -usually not reversible |
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A process in which one or more substances is changed into one or more new substances is a what?
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chemical reaction
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What are used to describe a chemical reaction?
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combination of formulas, numbers, and symbols
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What do not give the relative amounts of substances?
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skeleton equations
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What does aqueous mean?
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dissolved in water
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The ________ of products and reactants are equal.
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mass
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Two or more simple substances combine to form a single more complex substance
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combination/synthesis reaction
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Energy transferred from the reactants to the surroundings (heat and light are most common forms of energy given off)
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exothermic energy
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Energy transferred to the reactants from the surroundings
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endothermic energy
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What is true about balancing a chemical equation?
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-coefficients are used to balance the atoms on both side
-the law of conservation of matter must be followed -phases are often shown for each compound but are not critical to balancing an equation |
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In a chemical reaction, what is the relationship between the total mass of the reactants and the total mass of the products?
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they must be equal
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