Chemistry

explain why only one peak is present (either the anodic or cathodic peak) in a cyclic voltammogram of an irreversible electrochemical reaction.
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4. a laboratory experiment calls for 0.150 m hno3. what volume of 0.150 m hno3 can be prepared form 0.350 l of 1.98 m hno3?
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g cyclohexane and 2 hexene have the same molecular formula what chemical test would you carry out to distinguish the two compounds provide a chemical equation for the reaction
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What is the mole ratio of ammonia (with a pKb of 4.75) to ammonium chloride in a buffer with a pH of 9.15
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Use Hess' Law to calculate the change in enthalpy in the combustion of ethanol.
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At what temperature will 0.505 mole of CO2 occupy a volume of 3.50 x 103 mL at a pressure of 3185 mmHg?
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when a 25.7 ml sample of a 0.494 m aqueous hydrofluoric acid solution is titrated with a 0.424 m aqueous sodium hydroxide solution, what is the ph after 44.9 ml of sodium hydroxide have been added?
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the radioactive decay of c14 which is used in estimating the age of archaeological samples follows first order kinetics with a half-life of 5725 years at 300k. if a sample of c114 initially contains 0.0035 mol of c14, how many moles remain after 2500 years.
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When the reaction below produces 11.6 g of ethylene, CH4 it produces 2.4 L of hydrogengas at 300 K. What is the pressure of the hydrogen gas? 2 CH4 -> CH4 + 2 H
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lindane (hexachlorocyclohexane) is an agricultural insecticide that can also be used in the treatment of head lice. which is the lowest energy chair conformation of lindane?
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What is the heat, q , in joules transferred by a chemical reaction to the reservoir of a calorimeter containing 155 g of dilute aqueous solution ( c = 4.184 J/gK ) if the reaction causes the temperature of the reservoir to rise from 22.0 C to 26.5 C ?
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if a plant produces 4.91 mol c6h12o6, 4.91 mol c 6 h 12 o 6 , how many moles of co2 co 2 are needed?
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Consider the reaction for the formation of aluminum oxide from aluminum and oxygen.4Al(s)+3O2(g)2Al2O3(s)1Express the enthalpy of the following reaction, 2, in terms of 1.2Al2O3(s)4Al(s)+3O2(g)2Express the enthalpy of the following reaction, 3, in terms of 1.12Al(s)+9O2(g)6Al2O3(s)3Express the enthalpy of the following reaction, 4, in terms of 1.2Al(s)+32O2(g)Al2O3(s)4
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Indicate the type of intermolecular forces hold liquid nitrogen (N2) together?
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at what temperature is the system at equilibrium? at what temperature is the system at equilibrium? t>250k t
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1Which of the following is a balanced equation for the reaction?Aluminum Bromide + Chlorine Gas- Aluminum Chloride andBromine GasA 3AlBr3 + 2Cl-3AlCl3 + 2BrB2AlBr3 + 3Cl 2AlCl3 + 3Br2C2Al3Br + Cl - 2Al3Cl + BrD AlBr3 + 3Cl - AlCl3 + 3Br2
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a sample of a compound is decomposed in the laboratory and produces 330 g g carbon, 69.5 g g hydrogen, and 440.4 g g oxygen. calculate the empirical formula of the compound.
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describe how the orientaon of the glycosidic bond affects the properes of the polysaccharides it creates.
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if 0.0200 m fe3 is initially mixed with 1.00 m oxalate ion, what is the concentration of fe3 ion at equilibrium?
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in which compound is the oxidation state of oxygen -1? in which compound is the oxidation state of oxygen -1? h2so4 kch3coo o2 h2o2 h2o
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What do you think it means for a bond to have more ionic or more covalent character? Explain your thinking.
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What does Einstein's famous equation say that all matter is?concentrated supernovas that have condensed into dwarfsconcentrated energy that has condensed into the atomsconcentrated atoms that have condensed into protonsconcentrated nebulas that have been condensed into red giants
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a radioactive material is used for medical imaging. its half-life is 20min. after one day, the remaining radioactivity will be:
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a 0.50 liter sample of CO2 at STP is compressed to a volume of 0.10 litera and pressure of 1.6 atm. What is the temperature of the sample?
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