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Chapter: 19 -Problem: 3 >> An electrochemical cell is based on two half-reactions:Oxidation: Fe(s) ? Fe2+ (aq, 0.010 M) + 2 e?Reduction: Br2 (l) + 2 e? ? 2 Br? (aq, 1.0 M)Compute the cell potential.
Answer Preview: Given Fe 2 0 010 M Br 1 0 M Find E cell Conceptual Plan The reaction is spont…

, Chapter: 18 -Problem: 4 >> Use the tabulated free energies of formation to calculate the equilibrium constant for the reaction at 298 K:H2 (g) + Cl2 (g) ? 2HCl (g)
Answer Preview: DG f kJ mol H2 g 0 Cl2 g 0 HCl g 95 …

, Chapter: 20 -Problem: 2 >> A papyrus scroll was buried with King Tutankhamen 3330 years ago. The half-life of carbon-14 is 5730 years. The papyrus scroll sample had an initial decay of 15.3 disintegrations per minute per gram carbon. What is the current decay rate of the sample? (The decay rate is proportional to the amount of C-14 present.)
Answer Preview: Given rate 0 15 3 dis ming C t 1 2 5730 years t 3330 years F…

, Chapter: 19 -Problem: 4 >> Aluminum can be plated out of a solution containing Al3+ according to the half-reaction:Al3+ (aq) +3e- ? Al (s)What mass of aluminum (in grams) will be plated by the flow of 50 A of current 10 hours?
Answer Preview: Given 3 mol e 1 mol Al 50 A 10 hours Find g Al Conceptual …

, Chapter: 3 -Problem: 4 >> Fuel cells convert molecules to energy without actually burning them. One technology hopes to use hydrogen taken from ethanol C2H6O, which in turn is produced from grain. What mass of hydrogen (in grams) is contained in 1.00 gallon of ethanol? (The density of ethanol is 0.789 g/mL.)
Answer Preview: Given 1 00 gal ethanol C 2 H 6 O d ethanol 0 789 g mL Find g H Conceptual Plan Relationships Used …

, Chapter: 6 -Problem: 6 >> In Brazil, vehicles are fueled almost entirely by ethanol C2H6O, produced from sugar cane. Calculate the heat (in kJ) produced by ethanol for each 1.00 kg of CO2 produced.
Answer Preview: Given 1 00 kg CO 2 Find kJ Conceptual Plan Relationships Used The …

, Chapter: 16 -Problem: 1 >> Calculate the pH of each solution and indicate whether the solution is acidic or basic at 25 °C.a) [H3O+] = 0.012 Mb) [H3O+] = 3.7 × 10-7 Mc) [OH-] = 0.0046 Md) [OH-] = 8.1 × 10-8 M
Answer Preview: a pH log H 3 O log 0 012 1 92 b pH log H 3 O log 3 7 1…

, Chapter: 7 -Problem: 2 >> Determine the wavelength of light emitted when an electron in a hydrogen atom makes a transition from an orbital in n = 5 to n = 4.
Answer Preview: Given n 5 n 4 Find Conceptual Plan Relationships Used E n 2 18 10 18 J 1 …

, Chapter: 5 -Problem: 3 >> Calculate the density of oxygen gas at 37.4 °C and a pressure of 720 mmHg.
Answer Preview: Given T 37 4 C P 720 mmHg Find d Conceptual P…

, Chapter: 4 -Problem: 4 >> How many liters of 1.50 M KOH Solution Contains 0.455 mol of KOH?
Answer Preview: Given 1 50 M KOH 0 455 mol KOH Find volume of KOH solution in …

, Chapter: 10 -Problem: 3 >> Use molecular orbital theory to predict the bond order in HeH+, the cation of a helium and hydrogen atom.
Answer Preview: H 1 electron He 2 electrons cha…

, Chapter: 2 -Problem: 4 >> An iron sphere contains 8.55 × 1022 iron atoms. What is the radius of the sphere in centimeters? The density of iron is 7.87 g/cm3.
Answer Preview: Given 8 55 10 22 Fe atoms d 7 87 g cm 3 Find radius r of a sphere Conceptual Plan Rela…

, Chapter: 13 -Problem: 2 >> A solution is prepared by dissolving 114 g of glucose (C6H12O6) in 0.500 kg of water. The final volume of the solution is 590 mL. Calculate each value for this solution: a) molarity b) morality c) percent by mass d) mole fraction e) mole percent.
Answer Preview: mol n solute 100 …

, Chapter: 6 -Problem: 5 >> Use the standard enthalpies of formation to determine ?H°rxn for the reaction:Zn(s) + 2 HCl(aq) ? ZnCl2(aq) + H2(g)
Answer Preview: Given Zn s 2 HCl aq ZnCl 2 aq H 2 g Find Conceptual P…

, Chapter: 6 -Problem: 3 >> A cigarette lighter contains 2.90 g of butane, C4H10. Calculate the heat (in kJ) associated with the complete combustion of the butane in the lighter.C4H10 (g) + 13/2 O2 (g) ? 4 CO2 (g) + 5 H2O (g) ?Hrxn = -2658 kJ
Answer Preview: Given 2 90 g C 4 H 10 Find q Conceptual Plan Relationship…

, Chapter: 16 -Problem: 5 >> Find the pH of a 0.500 M NaCN solution. The salt dissociates completely into Na+ and CN-, and the Na+ has no acid or base properties.
Answer Preview: CN aq H 2 O l HCN …

, Chapter: 17 -Problem: 2 >> Calculate the molar solubility of iron carbonate FeCO3 in pure water.
Answer Preview: FeCO 3 s Fe 2 aq CO 3 2 aq K sp Fe 2 CO 3 2 …

, Chapter: 4 -Problem: 8 >> The titration of a 20.0-mL sample of an HCl solution of unknown concentration requires 8.32 mL of a 0.150 M NaOH solution to reach the equivalence point. What is the concentration of unknown HCl in M?
Answer Preview: Given 8 32 mL of 0 150 M NaOH 20 0 mL of HCl Find concentration of HCl solution Conce…

, Chapter: 9 -Problem: 1 >> Determine whether the bond between each pair of atoms will be pure covalent, polar covalent or ionic:a) S and O b) Al and Fc) C and Brd) Mg and Cl
Answer Preview: a EN 1 0 Polar cova…

, Chapter: 5 -Problem: 9 >> An unknown gas effuses at a rate that is 0.578 times that of nitrogen gas at the same temperature. Calculate the molar mass of the unknown gas in g/mol.
Answer Preview: Given Find M unk Conceptual Plan Rel…

, Chapter: 10 -Problem: 2 >> Write a hybridization and bonding scheme for SO42?.
Answer Preview: SO 4 2 has 32 electrons The central at…

, Chapter: 11 -Problem: 3 >> Octane has a normal boiling point of 125.5oC and a heat of vaporization (?Hvap) of 38.8 kJ / mol. What is the vapor pressure of octane at 20oC?
Answer Preview: Given T 1 125 5 o C P 1 760 mmHg D H vap 38 8 kJ mol T 2 20 o …

, Chapter: 5 -Problem: 1 >> A normal systolic blood pressure value is 110. mmHg. What is the pressure in pascal?
Answer Preview: Given 110 mmHg Find Pa Conceptual Plan Relationships Use…

, Chapter: 18 -Problem: 2 >> Consider the reaction:NO (g) + ½O2 (g) ? NO2 (g)Calculate ?G°rxn at 25 °C and determine whether the reaction is spontaneous.
Answer Preview: kJ mol S in J mol K NO g 91 3 210 8 O 2 g 0 205 2 NO 2 g 33 2 240 1 …

, Chapter: 6 -Problem: 1 >> Inflating one’s lungs requires the inflator to do pressure–volume work on the surroundings. If the lungs are inflated from a volume of 2.5 L to 5.5 L against an external pressure of 1.10 atm, how much work is done?
Answer Preview: Given V 1 2 5 L V 2 5 5 L P 1 10 atm Find w Con…

, Chapter: 15 -Problem: 4 >> Consider the reaction:2 H2S (g)? 2 H2 (g) + S2 (g) Kc = 1.67 × 10-7A reaction mixture initially contains [H2S] = 0.010 M. Find the equilibrium concentrations of H2 and S2.
Answer Preview: 2 H 2 S g 2 H 2 g S 2 g K c 1 6710 7 H 2 S H 2 S 2 I nit…

, Chapter: 3 -Problem: 5 >> A laboratory analysis of ascorbic acid (Vitamin C) produced the mass percent composition:C………40.98%H………4.58%O………54.50%Find the empirical formula.
Answer Preview: GivenIn a 100 g sample 40 98 g C 4 58 g H 54 50 g C Find empirical …

, Chapter: 15 -Problem: 1 >> Consider the reaction:CO (g) + 2 H2 (g) ?CH3OH (g)A reaction mixture initially contains [CO] = 0.600 M and [H2] = 1.20 M. At equilibrium, the CO concentration is found to be 0.100 M. Find the equilibrium constant for the reaction.
Answer Preview: CO g 2 H 2 g CH 3 OH g CO H 2 CH 3 OH I nitial 0 600 1 20 0 000 C hange E qui…

, Chapter: 1 -Problem: 1 >> Convert 1.76 miles to meters.
Answer Preview: Given 1 76 mi Find m These conversion factors are from Tables …

, Chapter: 3 -Problem: 3 >> The calcium in antacid tablets that contain calcium carbonate CaCO3 is touted as a good source of dietary calcium for bones. The mass percent of calcium in calcium carbonate is 40.04%. How much calcium does one obtain by consuming two antacid tablets that each contains 850 mg CaCO3? The recommended daily intake is 1000 mg for adults aged 18 to 50 years old. Do the two tablets supply the minimum re
Answer Preview: Given 1700 mg CaCO 3 2 tablets 850 mg 1700 Mass Ca 40 04 Find mg Ca Conce…

, Chapter: 3 -Problem: 1 >> An ibuprofen tablet contains 200 mg of the painkiller whose formula is C13H18O2. How many ibuprofen molecules does it contain?
Answer Preview: Given 200 mg C 13 H 18 O 2 Find molecules of C 13 H 18 O 2 Conceptual Plan Relationship …

, Chapter: 3 -Problem: 8 >> Write the balanced equation for the combustion of octane (C8H18), a liquid vehicle fuel component, in which it combines with oxygen to form gaseous carbon dioxide and gaseous water.
Answer Preview: C 8 H 18 l O 2 g CO 2 g H 2 O g Begin with C C 8 H 18 l O 2 g CO 2 g H …

, Chapter: 11 -Problem: 2 >> Calculate the energy in kJ necessary to vaporize 100 g of water at its boiling point.
Answer Preview: Given 100 g water Find kJ Conceptual Plan R…

, Chapter: 5 -Problem: 8 >> Calculate the root mean square velocity of oxygen molecules at 100 °C.
Answer Preview: Given O 2 T 100 C Find u rms Conceptual Pla…

, Chapter: 14 -Problem: 2 >> The decomposition of ozone is given by the equation:O3 (g) ? O2 (g) + O (g)The rate constant at 700 K was measured as 4.85 × 104 M-1s-1 and at 800 K was 3.58 × 105 M-1s-1. Find the activation energy in kJ/mol.
Answer Preview: Given T 1 700 K k 1 4 85 10 4 M 1 s 1 T 2 800 K k 2 3 58 10 5 M 1 s 1 F…

, Chapter: 2 -Problem: 2 >> Calculate the number of grams of silver in an American Silver Eagle coin that contains 0.288 moles of silver.
Answer Preview: Given0 288 mol Ag Find g Ag Conceptual Plan Relations…

, Chapter: 1 -Problem: 4 >> What is the mass in grams of an ice cube that is 1.1 inches per side?
Answer Preview: Givenl 1 1 in Find g Conceptual Plan Relationship Used V l 3 vol…

, Chapter: 9 -Problem: 2 >> Write a Lewis structure for CH3Cl.
Answer Preview: C is less electronegative than Cl H is alw…

, Chapter: 1 -Problem: 3 >> An experimental automobile has a 100.0 liter fuel tank filled with ethanol. How many pounds does the fuel add to the mass of the car?
Answer Preview: Given100 0 L Findlb These conversion factors are from Tables 1 2 1 3 1 4 173 94 lb 174 lb The units …

, Chapter: 8 -Problem: 4 >> Write a balanced equation for each of these cases:a) The reaction between sodium metal and bromine gas.b) The reaction between potassium metal and water.c) The reaction between hydrogen gas and chlorine gas.d) The reaction between calcium and water.
Answer Preview: a 2 Na s Br 2 g 2 NaBr s …

, Chapter: 1 -Problem: 2 >> Calculate the number of cubic meters of concrete necessary to support a deck if each of 14 concrete piers require 4750 cubic inches.
Answer Preview: Given14 piers 4750 in 3 Find m 3 Relationships Used 1 m 39 37 in Con…

, Chapter: 16 -Problem: 3 >> Find the percent ionization of a 1.00 M formic acid solution.
Answer Preview: HCO 2 H aq H 2 O l H 3 O aq HCO 2 aq HCO 2 H H 3 O HCO 2 I nitial 1 00 0 00 0 00 C han…

, Chapter: 16 -Problem: 4 >> Find the [OH-] and pH of a 0.500 M NH3 solution.
Answer Preview: NH 3 aq H 2 O l NH 4 aq OH aq NH 3 NH 4 OH I nitial 0 500 0 00 0 00 C hange E quil NH 3 a…

, Chapter: 5 -Problem: 4 >> A sample of gas has a mass of 0.205 g. Its volume is 0.112 L at a temperature of 25 °C and a pressure of 740 mmHg. Find its molar mass.
Answer Preview: Given m 0 205 g V 0 112 L T C 25 C P 740 mmHg Find Mola…

, Chapter: 4 -Problem: 6 >> What volume (in L) of 2.50 M NaCl Solution is required to completely react with 0.150 L of a 0.150 M AgNO3 solution according to the reaction:NaCl(aq) + AgNO3(aq) ? AgCl(s) + NaNO3(aq)
Answer Preview: Given 0 150 L of 0 150 M AgNO 3 0 250 M NaCl Find volume NaCl solution in L Conceptual P…

, Chapter: 2 -Problem: 1 >> Calculate the number of moles of iron in a sample that has 3.83 ? 1023 atoms of iron.
Answer Preview: Given3 83 102 3 Fe atoms Find mol Fe Conceptual Plan Relationship…

, Chapter: 8 -Problem: 2 >> Write the electron configurations of these elements and identify the core and valence electrons.a) Srb) Ar c) Ca d) Zn
Answer Preview: a Sr 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 4 s 2 3 d 10 4 p 6 5 s 2 core 36 electron…

, Chapter: 13 -Problem: 4 >> A solution contains 0.481 mol of Na2SO4 and 10.0 mol water. Calculate the vapor pressure of the solution at 25°C. The vapor pressure of pure water at 25 °C is 23.8 torr.
Answer Preview: Given 0 481 mol Na 2 SO 4 10 0 mol water P o water 23 8 torr at 25 C Find …

, Chapter: 4 -Problem: 3 >> If 37.6 g of LiBr is dissolved in enough water to make 2.50 L of solution, what is the molarity of the solution?
Answer Preview: Given 37 6 g LiBr 2 50 L of solution Find Molarity M Conceptual Plan Rel…

, Chapter: 24 -Problem: 2 >> How many unpaired electrons would you expect for the complex ion [Cu(NH3)6]2+?
Answer Preview: complex ion 2 NH 3 6 0 0 Cu 1 2 2Cu 2 Cu Ar 4 s 1 3 d …

, Chapter: 15 -Problem: 2 >> Consider the reaction:2 COF2 (g) ?CO2 (g) + CF4 (g)   Kc = 2.00In an equilibrium mixture, the concentration of COF2 is 0.35 M and the concentration of CO2 is 0.144 M. What is the equilibrium concentration of CF4?
Answer Preview: Given COF 2 0 35 M CO 2 0 144 M K c 2 00 …

, Chapter: 5 -Problem: 5 >> A 1.50-L mixture of helium, neon, and argon has a total pressure of 754 mmHg at 310 K. If the partial pressure of helium is 431 mmHg and partial pressure of neon is 211 mmHg, what mass of argon is present in the mixture?
Answer Preview: Given P He 431 mmHg P Ne 211 mmHg P total 754 mmHg V 1 50 L T 310 K F…

, Chapter: 4 -Problem: 7 >> Write an equation for the precipitation reaction that occurs (if any) when solutions of calcium chloride and potassium carbonate are mixed.
Answer Preview: Possible Products CaCO 3 KCl CaCO 3 is insoluble Compounds …

, Chapter: 5 -Problem: 6 >> Methanol (CH3OH) can be synthesized by the reaction: CO(g) + 2 H2(g) ? CH3OH(g) What volume (in liters) of methanol gas, measured at a temperature of 473 K and a pressure of 820 mmHg, is produced from 100.0 g of carbon monoxide CO?
Answer Preview: Given 100 0 g CO T 473 K P 820 mmHg Find V methanol Con…

, Chapter: 3 -Problem: 6 >> Ascorbic acid (Vitamin C) has the empirical formula of C3H4O3 and a molar mass of 176.13 g/mol. Find its molecular formula.
Answer Preview: GivenEmpirical formula C 3 H 4 O 3 Molar mass of ascorbic acid 176 13 g mo…

, Chapter: 17 -Problem: 1 >> A 1.0 L buffer solution contains 0.15 mol acetic acid and 0.10 mol sodium acetate. The Ka for acetic acid is 1.8 × 10-5. Calculate the pH of the solution before and after a 0.010 mol sample of NaOH is added to the buffer. (Ignore any change in volume upon adding the NaOH.)
Answer Preview: Ka 1 8 10 5 pK a log 1 8 10 5 4 74 OH aq HA aq H 2 O l A aq OH HA …

, Chapter: 11 -Problem: 1 >> A polar molecule will exhibit dipole–dipole forces. Which molecules will show dipole–dipole forces?a) CHF3b) OCSc) H2S
Answer Preview: F H…

, Chapter: 9 -Problem: 3 >> Write a Lewis structure for NO2-.
Answer Preview: N is lower electro negativity t…

, Chapter: 18 -Problem: 1 >> Consider the combustion reaction for calcium:2 Ca (s) + O2 (g) ? 2 CaO (s) ?H = -1270 kJ, ?S = -365 J/Ka) Calculate ?G at 25 °C and determine whether the reaction is spontaneous.b) Determine at what temperature (if any) the reaction is spontaneous.
Answer Preview: T 273 25 298 K G H T S 1270 10 3 J 298 K 365 J K 1 16 10 …

, Chapter: 6 -Problem: 4 >> Calcium metal reacts with hydrochloric acid according to the balanced equation:Ca(s) + 2 HCl (aq) ? CaCl2 (aq) + H2 (g)A 0.150 g sample of Ca metal is combined with enough HCl to make 100.0 mL of solution in a coffee-cup calorimeter. The calcium reacts and the temperature of the solution rises from 23.5 °C to 25.4 °C. Find ?Hrxn for the reaction. Use 1.00 g/mL as the density of the solution and Cs
Answer Preview: Given 0 158 g Ca 100 0 mL solution T i 23 5C T f 25 4C d …

, Chapter: 7 -Problem: 1 >> A 1-second pulse of a red laser pointer with a wavelength of 635 nm contains 5.0 mJ of energy. How many photons does it contain?
Answer Preview: Given E pulse 5 0 mJ 635 nm Find number of photons Co…

, Chapter: 5 -Problem: 7 >> How many grams of water form when 2.41 L of oxygen gas at STP completely react with an appropriate amount of H2?2 H2(g) + O2(g) ? 2 H2O(g)
Answer Preview: Given 2 41 L O 2 Find g H 2 O Conceptual Plan Relationships Used 1 mol 22 4 L at STP 1 mol O 2 …

, Chapter: 15 -Problem: 3 >> Consider the reaction:N2O4 (g) ? 2 NO2 (g)   Kc = 0.36A reaction mixture initially contains [N2O4] = 0.100 M. Find the equilibrium concentrations of N2O4 and NO2.
Answer Preview: N 2 O 4 g 2 NO 2 g K c 0 36 N 2 O 4 NO 2 I nitial 0 100 0 000 C hange E …

, Chapter: 12 -Problem: 1 >> A form of iron crystallizes with a body-centered unit cell. The radius of iron is 124 pm. Calculate the density of this form of iron in g/cm3.
Answer Preview: Given r 124 pm body centered cubic Find d Conceptual Plan l 4 r 3 V l 3 volume of a cube …

, Chapter: 10 -Problem: 4 >> Draw an MO energy diagram and determine the bond order for O22-. Is it diamagnetic or paramagnetic?
Answer Preview: O atom 6 electrons O atom 6 electrons 2 charge 2 electr…

, Chapter: 4 -Problem: 2 >> Nitrogen dioxide NO2 can be synthesized by the reaction:N2 (g) + 2 O2 (g) ? 2 NO2 (g) Starting with 46.3 g N2 and 92.0 g O2, find the theoretical yield of NO2 in grams.
Answer Preview: Given 46 3 g N 2 92 0 g O 2 Find Theoretical yield of NO 2 Conceptual Plan Relationships Used …

, Chapter: 17 -Problem: 4 >> A 250-mL portion of a solution that contains 1.5 mM Cu(NO3)2 is mixed with a solution that is 0.100 M NaCN. After equilibrium is reached, what concentration of Cu2+ (aq) remains?
Answer Preview: Cu 2 aq 4CN aq Cu CN 4 2 aq Cu 2 aq 4CN aq Cu CN 4 2 aq C…

, Chapter: 13 -Problem: 1 >> What pressure of nitrogen is required to keep the nitrogen concentration in a bottle of water at 0.12 M at 25 °C? Is this a reasonable value?
Answer Preview: Given S nitrogen 0 012 M Find P nitrogen Conceptual Plan Relationships Used The unit…

, Chapter: 6 -Problem: 2 >> When 1.10 g of ethanol (C2H6O) undergoes combustion in a bomb calorimeter, the temperature rises from 22.32°C to 29.48°C. Find ?Erxn for the combustion of ethanol in kJ/mol. The heat capacity of the bomb calorimeter, determined in a separate experiment is 4.70 kJ/°C.
Answer Preview: Given 1 10 g ethanol T i 22 32C T f 29 48C C cal 4 70 kJ C …

, Chapter: 8 -Problem: 1 >> Write the electron configurations of these elements:a) Sb) Arc) Cad) Zn
Answer Preview: a S1 s 2 2 s 2 2 p 6 3 s 2 3 p 4 Ne 3 s …

, Chapter: 23 -Problem: 1 >> Predict the silicate structure for the mineral talc Mg3Si4O10(OH)2 that serves as the basis for talcum powder, and show that the formula is charge neutral.
Answer Preview: Si O ratio is 4 10 or 2 5 The other two oxygens occur as hydroxides and are not pa…

, Chapter: 10 -Problem: 1 >> Predict the geometry and bond angles of SOCl2.
Answer Preview: SOCl 2 has 26 electrons Central atom S has 4 electro…

, Chapter: 5 -Problem: 2 >> Calculate the volume in L occupied by 1.43 mol of oxygen gas at a pressure of 3.25 atm and a temperature of 298 K.
Answer Preview: Given n 1 43 mol P 3 25 atm T 29…

, Chapter: 9 -Problem: 4 >> Hydrogen is considered an optimal fuel since it burns without forming any carbon dioxide.2 H2 (g) + O2 (g) ? 2 H2O (g)Use bond energies to calculate ?Hrxn.
Answer Preview: H H H H O O H O H H O H Bon…

, Chapter: 4 -Problem: 1 >> Humans use the glucose molecule as an energy source in the body:C6H12O6 (aq) + 6 O2 (g) ? 6 CO2 (g) + 6 H2O (l)How many grams of carbon dioxide are produced for every 100.0 g of glucose metabolized?
Answer Preview: Given 100 g C 6 H 12 O 6 Find g CO 2 Conceptual Plan Relationships Used molar mass CO …

, Chapter: 3 -Problem: 7 >> Upon combustion, a compound containing only carbon and hydrogen produced 2.59 g CO2 and 1.19 g H2O. Find the empirical formula of the compound.
Answer Preview: Given 2 59 g CO 2 and 1 19 g H 2 O Find empirical formula No ot…

, Chapter: 24 -Problem: 1 >> Write the ground state electron configuration for Nb and Nb3+.
Answer Preview: Nb is atomic number 41 in period 5 and group 5…

, Chapter: 13 -Problem: 3 >> A solution is prepared from 445 g of ethylene glycol (C2H6O2) and 500 g of water. This solution represents one that is 50% by volume ethylene glycol. At what temperature will the water in this solution boil?
Answer Preview: Given 445 g of ethylene glycol 500 g of water Find boiling poi…

, Chapter: 4 -Problem: 5 >> To what volume should you dilute 0.300 L of a 6.00 M KOH solution to obtain a 2.50 M KOH solution?
Answer Preview: Given V 1 0 300 L M 1 6 00 M M 2 2 50 M Find V 2 Conceptual Plan …

, Chapter: 21 -Problem: 2 >> Name the alkene: Transcribed Image Text: ?? CHs- CH-CH-?-??? CH2-CHa
Answer Preview: 2 4 dimet…

, Chapter: 19 -Problem: 1 >> Use tabulated standard half-cell potentials to calculate the standard cell potential for the reaction in an electrochemical cell at 25 °C:Zn2+ (aq) + H2O2 (aq) ? Zn (s) + O2 (g) + 2 H+ (aq)
Answer Preview: Oxidation H 2 O 2 aq 2 e O 2 g 2 H aq …

, Chapter: 19 -Problem: 2 >> Use the tabulated half-cell potentials to calculate K for the oxidation of nickel by chlorine:Cl2 (g) + Ni (s) ? 2 Cl? (aq) + Ni2+ (aq)
Answer Preview: Given Cl 2 g Ni s 2 Cl aq Ni 2 aq Find K Conceptual Plan The reaction is spo…

, Chapter: 2 -Problem: 3 >> What mass of iron (in grams) contains 1.20 × 1022 atoms of Fe? A paperclip contains about that number of iron atoms.
Answer Preview: Given1 20 1022 Fe atoms Find g Fe Conceptual Plan Relationship Used …

, Chapter: 16 -Problem: 2 >> Find the [H3O+] and pH of a 1.00 M formic acid solution.
Answer Preview: HCO 2 H aq H 2 O l H 3 O aq HCO 2 aq HCO 2 H H 3 O HCO 2 I nitial 1 00 0 00 0 00 C hang…

, Chapter: 3 -Problem: 2 >> Calculate the mass percent of calcium in calcium CaCO3.
Answer Preview: Given CaCO 3 Find mass percent Ca Conceptual Plan Relationship …

, Chapter: 17 -Problem: 3 >> Calculate the molar solubility of calcium sulfate CaSO4 in a solution containing 0.20 M Na2SO4.
Answer Preview: CaSO 4 s Ca 2 aq SO 4 2 aq K sp Ca 2 SO 4 2 CaSO 4 s Ca 2 aq SO 4 2 aq Ca 2 SO 4 2 Initial 0 00 0 …

, Chapter: 14 -Problem: 1 >> Hydrogen peroxide decomposes according to the reaction:H2O2 (aq) ? H2O (l) + 0.5 O2 (g) The reaction follows first-order decay with a rate constant of 3.68 h-1. If the initial concentration is 30.0 ppm, what is peroxide concentration after 2.00 hours?
Answer Preview: Given k 3 68 h 1 H 2 O 2 0 30 0 ppm Find …

, Chapter: 18 -Problem: 3 >> Consider the reaction:CH3Cl (g) + Cl2 (g) ? CH2Cl2 (l) + HCl (g)Use the standard free energies of formation to determine ?G°rxn for this reaction at 25°C.
Answer Preview: kJ mol CH 3 Cl g 60 2 Cl 2 g 0 …

, Chapter: 20 -Problem: 1 >> Fluorine-18 is a radioactive isotope that emits positrons and is used in PET scans (positron emission tomography). It has a half-life of 110 minutes. If a patient is given a 1.5 ng sample of 18F-, how much of the sample in molecules persists after a day?
Answer Preview: Given mass F 18 initial 1 5 ng t 1 2 110 min t 1 day Find n…

, Chapter: 8 -Problem: 3 >> On the basis of periodic trends, choose the SMALLER atom from each pair:a) Sr or Ca b) Ar or Kr c) Ca or K d) O or F
Answer Preview: a 1A2A H Be Mg Ca …

, Chapter: 22 -Problem: 1 >> Examine the structure of deoxyribose, part of the backbone in DNA. Does deoxyribose exhibit optical isomerism? If so, which carbon atoms are chiral? Transcribed Image Text: ??? ? -? ?? -? ? ?? C?-??
Answer Preview: With two chiral ce…

, Chapter: 23 -Problem: 2 >> Calculate the oxidation state for Cl in the compounds:a) Cl2O6b) ClF3c) HClO4
Answer Preview: a Oxidation states Oxygen 3 2 6 Chlorine 2 6 Chlori…

, Chapter: 22 -Problem: 2 >> Show the tripeptide that result from linking the amino acids glycine, valine, and serine in that order. Label the N-terminus and C-terminus ends of the tripeptide. Transcribed Image Text: ?? ?? ?? | ? ??N - ? -?-?? HN -?-?-?? ?? -?-? HN-C-?-?? ??? ? CH, ?? ?yclne valine ?elne
Answer Preview: HN C C OH H H O H N C C OH HC …

, Chapter: 21 -Problem: 1 >> Name the alkane: Transcribed Image Text: CHs CHy-CH-CH ??-?HS CH2-CH
Answer Preview: 2 4 dimethylhexan…

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