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| The relationships among the quantities of reactants and products involved in chemical reactions. |
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| Law of Conservation of Mass |
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Definition
| Total mass of products of chemical reaction are the same mass of reactants, so that mass remains constant during the reaction. |
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| A representation of a chemical reaction using the chemical formulas of the reactants and products - balanced contain numbers of atoms of each element on both side. |
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| A starting substance in a chemical reaction - appears to the left of the arrow in a chemical reaction. |
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| A substance produced in a chemical reaction - appears to the right of the arrow in a chemical reaction. |
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| Chemical reaction that proceeds with evolution of heat and usually a flame - most involve a reaction with oxygen, as in burning of a match. |
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| Chemical reaction in which two or more substances combine to form a single product. |
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| Chemical reaction in which a single compound reacts to give two or more products. |
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| Average mass of atoms in an element in amu - numerically equal to mass in grams of 1 mol of the substance. |
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| Unit based on value of exactly 12 amu for the mass of the isotope of carbon that has 6 protons and 6 neutrons in the nucleus. |
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Definition
| Mass of a collection of atoms represented by a chemical formula. (IONIC) |
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| Mass of a collection of atoms represented by the chemical formula for a molecule. (COVALENT) |
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Definition
| An instrument used to measure the precise masses and relative amounts of atomic and molecular ions. |
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| A collection of Avagadro's Number of objects. |
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Definition
| The number of Carbon atoms in exactly 12g of Carbon 12. Equals 6.022 x 1023. |
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Definition
| The mass of 1 mol of a substance in grams - numerically equal to the formula weight in amu. |
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Definition
| Reactant present in the smallest stoichiometric quantity in a mixture of reactants - amount of product that can form is constrained by complete consumption of this reactant. |
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| Quantity of a product that is calculated to form when all of the limiting reagent reacts. |
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| The ratio of the actual (experimental) yield of a product to its theoretical (calculated) yeild, multiplied by 100. |
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