Chemistry concepts and calculations

13. Challenge question (optional): An alternative way of making Buffer#2 pH 5.40

13. Challenge question (optional): An alternative way of making Buffer#2 pH 5.40 would be to add a certain amount of NaOH to the acetic acid solution. Calculate how many mL of 0.5…

13. Circle the element, ion or molecule which has the: K or Ca a. smaller atomic

13. Circle the element, ion or molecule which has the: K or Ca a. smaller atomic radius or As b. larger atomic radius Na+ orF larger ionic radius d. larger ionization potential e.…

13. Combetion analysis of on unkan compuund contaising only carbon and hydrop pr

13. Combetion analysis of on unkan compuund contaising only carbon and hydrop prodaced 0.2845 g of CO2 sd 01451of HaO, Whet is the empirical formuls of the ompours c) Call o D)C3H…

13. Complete the following chemical equation and balance it. (6 points) AgNO3 +

13. Complete the following chemical equation and balance it. (6 points) AgNO3 + Na3PO4 14. Consider the following reaction: NaCl + AgNO3 NaNO3 + AgCl (6 points) A. This reaction d…

13. Consider the following: N 2 O 4(g) 2NO 2(g) Colourless Brown N 2 O 4 is plac

13.       Consider the following:  N2O4(g)                2NO2(g)                                                             Colourless                    Brown N2O4 is placed in…

13. Convert 125.0 calories to Joules. A. 523J B. 210J C. 41.84J D. 764.1 J How m

13. Convert 125.0 calories to Joules. A. 523J B. 210J C. 41.84J D. 764.1 J How much energy (calories) is needed to raise 12.0 grams ethanol at 14. 24.0 to 42.0 ? specific heat of …

13. Each response below lists an ion by name and by chemical symbol or formula.

13. Each response below lists an ion by name and by chemical symbol or formula. Also each ion is classified as monoatomic or polyatomic and as a cation or anion. Which response co…

13. Electrochemical cell a) balanced overall reaction for a sucessful cell made

13. Electrochemical cell a) balanced overall reaction for a sucessful cell made from these two couples 2Ag+ + H2SO3 + H2O ---> SO4^2- + 4H+ + 2Ag b) line notation for the cell …

13. Explain why the ionization energy decreases between Groups VA and VIA. 14. I

13. Explain why the ionization energy decreases between Groups VA and VIA. 14. In general, how does the second ionization energy compare to the 15. How does the third ionization e…

13. Filt Dissolved solids a. b. Colloidal solids c. Suspended solids d. Volatile

13. Filt Dissolved solids a. b. Colloidal solids c. Suspended solids d. Volatile solids 14. Polymers aid in chemical coagulation primarily by what me a. Charge neutralization b. E…

13. Filt Dissolved solids a. b. Colloidal solids c. Suspended solids d. Volatile

13. Filt Dissolved solids a. b. Colloidal solids c. Suspended solids d. Volatile solids 14. Polymers aid in chemical coagulation primarily by what me a. Charge neutralization b. E…

13. Find the equivalent resistance for the given system 775 94 61 94 B 115 775 c

13. Find the equivalent resistance for the given system 775 94 61 94 B 115 775 c) 3 D) 61 sn 740 94 on 14. The figure shows three capacitors with capacitance CI, C2 and C3. Find t…

13. For an isothermal process, S = ________ [A] T q rev [B] q [C] q rev /T [D] q

13. For an isothermal process, S = ________ [A] Tqrev [B] q [C] qrev/T [D] q + w [E] qrev 14. Which one of the following is always positive when a spontaneous process occurs? [A] …

13. Give the major reaction conditions (including all reactants) required for th

13. Give the major reaction conditions (including all reactants) required for the transfornation shown OH OH Part 6: Complete the following questions regarding miscellaneous topic…

13. Given the reaction at equilibrium: Xy(g) + 2 ½(g) (? 2xY2(g) + 80 kcal The e

13. Given the reaction at equilibrium: Xy(g) + 2 ½(g) (? 2xY2(g) + 80 kcal The equilibrium point will shift to the right if the pressure is (A) increased and the temperature is in…

13. How many atoms of Xe are there in 2624 g of Xe? 14. How many grams of Mg(OH)

13. How many atoms of Xe are there in 2624 g of Xe? 14. How many grams of Mg(OH)2 are there in 0.244 moles of Mg(OH)2? 15. How many grams of AI(NOs)s are there in 2.456 moles of A…

13. How many electrons are transferred in the following reaction? (The reaction

13. How many electrons are transferred in the following reaction? (The reaction is unbalanced.) Fe2+ (aq) + K(s) Fe(s) + K+(aq) A) 1 6 14. Use the tabulated half-cell potentials b…

13. How many stereoisomers of 3-bromo-2-butanol exist? 13. OH a. b. 2 CH3CHCHCH3

13. How many stereoisomers of 3-bromo-2-butanol exist? 13. OH a. b. 2 CH3CHCHCH3 c. 3 d. 4 Br 14. Which is most reactive in an SN1 reaction? d. I HaC CH3 b. CH3I H CH HTC 15. hich…

13. If the IR spectrum of ChemicalX shows NO absorption above 3000 cm1, which of

13. If the IR spectrum of ChemicalX shows NO absorption above 3000 cm1, which of the following could Chemical X possibly be? Hint: draw an example of each structure with all hydro…

13. If the IR spectrum of ChemicalX shows NO absorption above 3000 cm1, which of

13. If the IR spectrum of ChemicalX shows NO absorption above 3000 cm1, which of the following could Chemical X possibly be? Hint: draw an example of each structure with all hydro…

13. In the balanced chemical equation, c Mno4\" (ag which takes place in acidic

13. In the balanced chemical equation, c Mno4" (ag which takes place in acidic aqueous solution, the ratio of coefficients ba to 3 significant figures is (a) 2.50 (b) 1.60 (c) 2.0…

13. Let\'s work through a more complicated example of a rate law where the rate

13. Let's work through a more complicated example of a rate law where the rate leermining surp i we first reaction. overall HCi Cela and the following infirmmation tiven are the e…

13. Let\'s work through a more complicated example of a rate law where the rate

13. Let's work through a more complicated example of a rate law where the rate leermining surp i we first reaction. overall HCi Cela and the following infirmmation tiven are the e…

13. Multiple Guess: Which of the following statements are true concerning the Mo

13. Multiple Guess: Which of the following statements are true concerning the Molecular Orbital Theory model a. A molecule is assumed to be an entirely new entity consisting of po…

13. Oops. You just accidentally ingested a solution of mercury 2+ solution. You

13. Oops. You just accidentally ingested a solution of mercury 2+ solution. You have to act fast. You whip out your handy CRC (next page) and search the shelf for possible antidot…

13. Order the forces (dipole-dipole, London dispersion, ionic, and hydrogen-bond

13.     Order the forces (dipole-dipole, London dispersion, ionic, and hydrogen-bonding) from weakest to strongest . a)       dipole-dipole, London dispersion, ionic, and hydrogen…

13. Selective precipitation is a process in which a. Compounds precipitate when

13. Selective precipitation is a process in which a. Compounds precipitate when pH is altered b. Compounds precipitate if temperature is altered c. In presence of a suitable reage…

13. The concentration of iodide ions in a saturated solution of lead (II) iodide

13. The concentration of iodide ions in a saturated solution of lead (II) iodide is ________ M. The solubility product constant of PbI2 is 1.4 x 10-8. [A] 1.4 x 10-8 [B] 1.5 x 10-…

13. The following cobalt complexes absorb at 700, 600, 500, 475, 310. Given the

13. The following cobalt complexes absorb at 700, 600, 500, 475, 310. Given the following spectrochemical series: F<H2O<NH3<CN, which lists the complexes in the correct o…

13. The hydrophobic effect between a lipid and water arises due to Lipid-water e

13. The hydrophobic effect between a lipid and water arises due to Lipid-water electrostatic interactions Lipid-water hydrogen bond interactions a. c.Dynamics of water molecules W…

13. The isolation of trimyristin from nutmeg is an example of? a. Liquid-liquid

13. The isolation of trimyristin from nutmeg is an example of? a. Liquid-liquid extraction b. Solid-liquid extraction c. Solid-Solid extraction 14. The following reaction was moni…

13. The kinetics of the decomposition of dinitrogen pentoxide is studied at 50°C

13. The kinetics of the decomposition of dinitrogen pentoxide is studied at 50°C and at 75 C t the concentration. It is observed that the rate is higher at the higher temperature.…

13. The maximum stress found on an S-N curve is: a. tensile b. yield c. modulus

13. The maximum stress found on an S-N curve is: a. tensile b. yield c. modulus d. mean 14. Use the rule of mixtures to find the maximum modulus possible for a material that has 3…

13. The solubility of any gas in a liquid can always be increased by ________ A.

13. The solubility of any gas in a liquid can always be increased by ________ A. increasing the pressure of the gas above the solvent. B. using a solvent that can form hydrogen bo…

13. The standard molar entropy of lead(II) bromide (PbBr 2 ) is 161 J/mol K. Wha

13. The standard molar entropy of lead(II) bromide (PbBr2) is 161 J/mol K. What is the entropy of 2.45 g of PbBr2? a. +1.07 J/K d. 161 J/K b. 1.07 J/K e. 0 J/K c. +161 J/K 14. Cal…

13. The standard molar entropy of lead(II) bromide (PbBr 2 ) is 161 J/mol K. Wha

13. The standard molar entropy of lead(II) bromide (PbBr2) is 161 J/mol K. What is the entropy of 2.45 g of PbBr2? a. +1.07 J/K d. 161 J/K b. 1.07 J/K e. 0 J/K c. +161 J/K 14. Cal…

13. Two igh wires re hung vertical, With electricl curent in both wires directed

13. Two igh wires re hung vertical, With electricl curent in both wires directed upw ards A) the wires will experience a force of attraction C) the force on the right hand wire wi…

13. Under normal circumstances, the temperature of a rising parcel of air as it

13. Under normal circumstances, the temperature of a rising parcel of air as it ascends in the a increases b. decreases c. increases then decreases d. decreases then increases 14.…

13. Under normal circumstances, the temperature of a20. Normally, a parcel ofair

13. Under normal circumstances, the temperature of a20. Normally, a parcel ofair rising parcel of air troposphere.as it ascends in the if it is warmer than the surrounding air, co…

13. What are the two major categories of sedimentary rocks. One of these categor

13. What are the two major categories of sedimentary rocks. One of these categories can be broken down into two sub-categories. What are they? Be able to say a few words about how…

13. What featured does a Ramachandran plot display? The hydropathy of amino acid

13. What featured does a Ramachandran plot display? The hydropathy of amino acids preferred amino acids In an alpha-helix allowed angles of phi and psi for a polypeptide backbone …

13. What featured does a Ramachandran plot display? The hydropathy of amino acid

13. What featured does a Ramachandran plot display? The hydropathy of amino acids preferred amino acids In an alpha-helix allowed angles of phi and psi for a polypeptide backbone …

13. What is the Ke equilibrium-constant expression for the following equilibrium

13. What is the Ke equilibrium-constant expression for the following equilibrium? A) [H20] B) [Fe][H20] [Fe][H20] D) [H2] H20 [Fe] H 14, Given the reaction 2NH,(g) At equilibrium,…

13. What is the Ke equilibrium-constant for the following equilibrium? expressio

13. What is the Ke equilibrium-constant for the following equilibrium? expression A) [H20] B) [Fe][H20] [Fe][H20] D) [H2] H20 [Fe] H 14. Given the reaction At equilibrium, it was …

13. What is the change in entropy when 0.200 mol of potassium freezes at 63.7 \"

13. What is the change in entropy when 0.200 mol of potassium freezes at 63.7 "C and 1.00 bar AH- 2.39 kJ mol- A. 35.5JK- mol- B. 1.42J K-I mol 1 C. 5.96J K-1mol- D. 3.75 J K-1 mo…

13. What is the concentration of a 0.500 M NaCl solution in terms f a. mass perc

13. What is the concentration of a 0.500 M NaCl solution in terms f a. mass percent b. mole fraction (assume the density of the solution is 1.00 g/mL, show your work) 14. Which aq…

13. Which compound is expected to show an intense ir absorption at 3050. Please

13. Which compound is expected to show an intense ir absorption at 3050. Please help. I'm really struggling. If you can answer all that'll be great Organic Chemistry II Practice E…

13. Which ground-state atom has an electro 8 Which of the following configuratio

13. Which ground-state atom has an electro 8 Which of the following configuration is following orbital diagran? A) 3d 8) A) Bromine 8) germanium D) tellurium C) [w] ! D) E) none o…

13. Which is the most stable conformation for CH CH 14. The BC NMR spectrum of w

13. Which is the most stable conformation for CH CH 14. The BC NMR spectrum of which compound contains only two peaks? (A) CH CH CH CH OH 15. Which reaction would yield a meso pro…

13. Which of the following combination will result in \"no reaction\"? a) NaC03(

13. Which of the following combination will result in "no reaction"? a) NaC03(aq) + Mg(NO3)2(aq) b) NaCl(aq) + ZnSO4(aq) c) Na2SO4(aq) + BaCl2(aq) d) HNO3(aq) + Ca(OH):aq) 14. Whi…