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8 Cards in this Set
- Front
- Back
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stoichiometry
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relating the quantities of different substances in a chemical equation
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limiting reactant
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When there is more than one reactant in a chemical equation, one of those reactants will usually run out first, stopping the entire reaction. We call that reactant the ___________ __________, because once it runs out, the reaction cannot continue. Since the reaction cannot continue, no more products will form.
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excess reactant
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When a chemist adds lots of extra reactant in order to make sure that the other reactant is the limiting reactant, we say that the chemist is adding.... what?
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stoichiometric coefficients
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The numbers that appear to the left of each substance in the equation.
They provide a way of converting from the number of moles of one substance in the equation to the number of moles of any other substance in the equation. |
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Gay-Lussac's Law
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The stoichiometric coefficients in a chemical equation relate the volumes of gases in the equation as well as the number of moles of substances in the equation.
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molecular formula
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A chemical formula that provides the number of each type of atom in a molecule.
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empirical formula
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A chemical formula that tells you a simple, whole-number ratio for the atoms in a molecule.
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molar mass
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The mass of one mole of a given compound.
the molar mass is just the conversion relationship that goes from grams to moles. If we know the molecular mass of a compound, we know its molar mass. |
