chapter three vocabulary
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| chemical stoichiometry | calculation of quantities of material consumed and produced in chemical reactions
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| mass spectrometer | instrument used to determine relative masses of atoms by deflection of their ions on a magnetic field
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| average atomic mass | also known as atomic mass. average mass of an element
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| mole | number equal to number of carbon atoms in exactly 12 grams of pure carbon-12.
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| Avogadro's number | number of atoms in exactly 12 grams of pure carbon-12. 6.02 x 10^23
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| molar mass | mass in grams of 1 mole of molecules or formula units of a substance also called molecular weight
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| conceptual problem solving | problem solving in a flexible, creative way based on an understanding of the fundamental ideas of chemistry
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| mass percent | percent by mass of a component of a mixture of a given element in a compound.
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| empirical formula | simplest whole number ratio of atoms in a compound
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| molecular formula | exact formula of a molecule giving the types of atoms and the number of each type
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| chemical equation | representative of a chemical reaction showing the relative numbers of reactants and product molecules
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| reactants | starting substance in a chemical reaction. appears to the left of the arrow in a chemical reaction.
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| products | substance resulting from a chemical reaction. shown to the right of the arrow in a chemical equation.
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| balancing a chemical equation | obeying the law of conservation of mass. Same number and types of atoms present in both reactants and products.
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| mole ratio | ration of moles of 1 substance to moles of another substance in a balanced chemical equation
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| stoichiometric mixture | mixture contains the relative amounts of reactants that match the numbers in the balanced equation.
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| limiting reactant | reactant that is completely consumed when a reaction is run to completion
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| theoretical yield | maximum amount of a given product that can be formed when the limiting reactant is completely consumed.
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| percent yield | actual amount of a product as a percent of the theoretical yield
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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