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47 Cards in this Set

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 homogeneous all mixed together equally, all in one phase Heterogeneous orange juice with pulp, liquid + solid Density= mass/volume Celsius to Fahrenheit F = (9/5)C + 32 precision how close measurements in a series are to eachother accuracy how close a measurement is to the actual value kinetic energy energy due to motion potential energy energy due to position K to C C = K - 273.15 Law of Conservation of Mass Mass is conserved in chemical reactions Law of Constant Composition compounds compositions are the same ANYTIME, ANYWHERE Law of Multiple Proportions Elements combine in specific rations every time 1 mole (mol) 6.022 x 1023 molar mass the mass in grams of one mol of substance mass % = mass of atoms of element/mass of all atoms x 100 find empiricle formula of compound with C=44.77% H=7.52% and O=47.71% C5H10O4 s solid l liquid g gas aq aqueous limiting reactant reactant that runs out first and determines final amount theoretical yield max. possible yield of products, predicted by the balanced equation and reactant quantities Theoretical yield of ammonia in the reaction of 25.0 g N2 and 6.00 g H2? Theoretical Yield = 30.4 g NH3 Percent yield = actual yield/theoretical yield 41.5 g bromobenzene from 25.2 g benzene and excess bromine, percent yield? 81.90% base yield OH- in water Isotope atoms with same number of protons, but different numbers of NEUTRONS Empirical Formula Shows the simplest integer ratio of atoms of each element in a compound Molecular Formula Shows the number of Atoms of ach element in a molecule Structural Formula Shows the connectivity of the atoms in a molecule Formulas of hydrogen peroxide Empirical Formula: HO Molecular Formula H2O2 Acid Yield H+ ions in water Binary Aqueous Acids acid = 2 elements (aq) = in water Hydrocarbons contain only carbon and hydrogen Alkanes hydrocarbons with only single bonds Compound matter composed of two or more different elements chemically bonded together mixture two or more substances that are physically intermingled What mass of iron(III) oxide will be produced if 12.3 g of iron react with an excess of oxygen according to the reaction, 4F(s) + 3O2(g) --> 2Fe2O3(s) a) 4.4 g b) 8.8 g c) 16.7g d) 17.6 g e) 35.2 g isomers compounds with the same molecular formula, but with different properties (shape, etc.) titrant a solution of accurately known concentration analyte a solution of unknown concentration equivalence point exact titrant volume required to completely react with the analyte end point the titrat volume slightly in excess of that required to completely react with the analyte metal activity series Li, K, Ba, Ca, Na, Mg, Al, Mn, Zn, Cr, Fe, Cd, Co, Ni, Sn, Pb reversible reaction reaction that proceeds simultaneously in both directions equilibrium the forward reaction and the reverse reaction proceed at equal rates combustion reactions 2C4H10 + 13O2 ----> 8CO2 + 10H2O