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12 Cards in this Set
- Front
- Back
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Chemical equations.......
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describe chemical reactions
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In a combustion reaction one of the reactants is....
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oxygen
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What is a binary compound?
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A compound composed of two elements and can either be ionic or molecular.
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What is the law of Definite proportions?
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When in chemical compounds the masses of the elements are always in the same proportions
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What is the law of Multiple proportions?
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Whenever the same two elements form more than one compound. In the ratio of small whole numbers.
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when do you put a -ite or -ate at the end of a chemical formula?
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When the element is a polyatomic ion that includes oxygen in the formula.
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What do roman numerals show?
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The charge of the element
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What is a catalyst?
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A substance that speeds up the reaction but is not used up in the reaction.
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When is the delta sign used?
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To indicate that heat is supplied to the reaction.
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What is a decomposition reaction?
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a chemical exchange in which a single compound breaks down into two or more simpler products.
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What is single-replacement reaction?
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a chemical exchange in which one element replaces a second element in a compound.
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What is double-replacement reaction?
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A chemical change involving an exchange of positive ions between two compounds.
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