Chemistry

in the reaction: Zn + H2SO4ZnSO4+ H2, the mole ratio of zinc to sulfuric acid is?
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what is the molar mass of freon-11 gas if its density is 6.13 g/l at stp? multiple choice 0.274 g/mol 3.64 g/mol 78.2 g/mol 137 g/mol 365 g/mol
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during the titration of an unknown acid by a strong base, the initial ph is 4.0. this indicates the acid is:
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cobalt(ii) chloride is dissolved in ethanol, and then water is added. what is the co(ii) complex equilibrium reaction? equilibrium reaction:
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describe how you can determine the ratio of cis- and trans-2-methylcyclohexanols from the 1h nmr spectrum provided. (hint: what do the peaks at 3.05 ppm and 3.75 ppm represent and what does their integration show?)
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is it possible to determine the amount of energy released in a in a combustion reaction, the energy released as the products form is
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what is the term for the shorthand description of the arrangement of electrons by sublevels according to increasing energy? group of answer choices atomic notation atomic number continuous spectrum electron configuration none of the above
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9) if you had a stock of 100% ethanol and wanted to make 250ml of a 70% ethanol solution (in water), how would you make it?
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what is the specific rotation of pure (s)-carvone if a sample of (r)-carvone of 85% ee has a specific rotation of -52?
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a tertiary alkyl bromide was heated in ethanol, thereby giving both sn1 and e1 reaction products. which statement is false concerning the sn1 and e1 reactions that occur?select answer from the options belowthe rate determining step for both processes is the first step: loss of the leaving group.in the sn1 mechanism, the solvent (ethanol) serves as the nucleophile, whereas in the e1 mechanism, the solvent serves as the base.the sn1 and e1 reaction mechanisms both involve a carbocation intermediate.the sn1 and e1 reaction mechanisms are both concerted processes.
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determine the limiting reagent in the reaction between 1,6-diaminohexane and sebacoyl chloride. calculate the percent yield of nylon using the molecular weight of one repeating monomer unit for the weight of the product.
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if you add 25 ml of water to 15 ml of a 0.050 m hcl solution, what is the new concentration of the solution?
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What is the solubility of Mg(OH) at a pH of 12.80? (Ksp Mg(OH) is 1.6 10)
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a chemist mixes of water with of methanol and of 2-methylpyrazine. calculate the percent by mass of each component of this solution. be sure each of your answer entries has the correct number of significant digits.
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HO + SO3 H SO4PbSO4 PbSO3 + 02C2H4 + O2 CO2 + HOMg + Fe2 O3 Fe + MgONaBr + H3PO4Na3PO4 + HBr1. Synthesis2. Decomposition3.Single-Replacement4.Double-Replacement5. Combustion
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what is the ph of a solution that is prepared by mixing 100 ml of 0.20 m hcl with 200 ml of 0.10 m naoh
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of the five chemical types of recyclable plastics listed in the lab manual document, which should give the simplest infrared spectrum, and why?
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what's the difference between an alkane and an alkene?? simple answer pls
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benzene has bp of 80oc, toluene has bp of 110 oc and xylene has boiling point of 130 oc. the gc of a mixture of these three compounds should show retention times as
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Another method of reporting the hardness of water is in grains per gallon. Take one grain to be 17. 14 ppm of calcium carbonate. What is the hardness of the unknown sample you analyzed reported in grains per gallon?
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A mixture of 0.2000 mol of CO2, 0.1000 mol of H2 and 0.1600 mol of H2O is placed in a 2.000 L vessel. The following equilibrium is established: CO2(g) + H2(g) CO(g) + H2O(g) At equilibrium [H2O] = 0.0856 M. a. Calculate the equilibrium concentrations of CO2, H2 and CO. b. Calculate Kc for the reaction
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what volume (ml) of 7.48x10-2 m perchloric acid can be neutralized with 115ml of 0.244m sodium hydroxide?
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now you will investigate the emission spectra for a different element, helium. helium is the next element after hydrogen on the periodic table and has two electrons. do you think the emission spectra for an atom with two electrons instead of one will be significantly different than that of hydrogen? explain your answer.
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calculate the ph of a buffer solution that is formed by mixing 85 ml of 0.13 m lactic acid with 95 ml of 0.14 sodium lactate
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