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17 Cards in this Set
- Front
- Back
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Precision
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measure of how close a series of measures are to one another
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Accuracy
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measure of how close a measurement comes to the actual or true value of whatever is measured
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atomic number
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equals the number of protons
#protons = #electrons mass number - atomic number = neutrons |
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What is the Heisenberg uncertainty principle?
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*it is impossible to know exactly both the velocity and the position of a particle at the same time
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Theoretical Yield
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*How much you're SUPPOSED to get
-Given: number of moles of CO2 Find: grams of CO2 Solve: multiply #moles x molar mass CO2 =grams CO2 = theoretical yield |
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Actual Yield
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*found by experiment
-given to you in problem |
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Percent Yield
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Actual Yield/Theoretical Yield
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Limiting Reagent
-limits or determines the amount of product that can be formed in a reaction |
Given: x mol of O2; x mol of C7H16
x mol of 02/leading coefficient of O2 x mol of C7H16/leading coefficient of C7H16 *whichever is smaller is the limiting reagent and will run out first* |
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Excess Reagent
-the reactant that is not completely used up in a reaction |
take limiting reagent and multiply it by the mole ratio
e.g. 0.521 mol C7H16 x 11 mol O2/1 mol C7H16 C7H16 + 11O2 = 7CO2 + 8H2O |
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To find the moles of products, what must be used on the left side of the equation?
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limiting reagent
for example: Given: .521 mol of C7H16 and 11 mol of 16.2 mol of O2 *C7H16 is limiting reagent* -use C7H16 to find moles of products: CO2 and H2O |
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Organic Chemistry
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study of carbon-containing substances
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Inorganic chemistry
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substances that do not contain carbon: mainly nonliving things
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Analytical chemistry
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concerned w/ composition of substances
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Physical chemistry
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theories and experiments that describe the behavior of chemicals
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biochemistry
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the study of the chemistry of living organisms
e.g. blood clotting, digestion, respiration, etc. |
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As we move from left to right across the periodic table, electronegativity....
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increases
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As we move down the periodic table, electronegativity...
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decreases
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