Chemistry concepts and calculations

2) The following two solvent systems were found to separate compounds X and Y by

2) The following two solvent systems were found to separate compounds X and Y by flash chromatography: • The solvent that placed X in the optimal Rf range is 10:1 hexane: ethyl ac…

2) The four bonds of carbon tetrachloride (CCl 4 ) are polar, but the molecule i

2) The four bonds of carbon tetrachloride (CCl4) are polar, but the molecule is nonpolar because the bond polarity is canceled by the symmetric tetrahedral shape. When other atoms…

2) The initial rate for an enzyme-catalyzed reaction has been determined at a nu

2) The initial rate for an enzyme-catalyzed reaction has been determined at a number of substrate concentrations. Data are given below. [S](M)_________ vo(Mmin-1) 5 ______________…

2) The international financial institution responsible for providing credit to d

2) The international financial institution responsible for providing credit to developing nations is the … 3) The permanent modification of behavior in an individual wild animal i…

2) The radioactive decay of 14C is a first order process with a half life of 573

2) The radioactive decay of 14C is a first order process with a half life of 5730 years. If the living wood gives 15.3 disintegrations per minute per gram, and a wooden bowl found…

2) The value of the equilibrium constant for the reaction H2 (g)+ Br2 (8)2 HBr (

2) The value of the equilibrium constant for the reaction H2 (g)+ Br2 (8)2 HBr (8) at 25°C is K-1.9 x10 a) Write the expression for the equilibrium constant for this reaction. b) …

2) Three identical resistors, when connected in series, transform electrical ene

2) Three identical resistors, when connected in series, transform electrical energy into thermal energy at a rate of 12 W (4.0 W per resistor).Determine the power consumed by the …

2) To calibrate your calorimeter cup, you first put 53 mL of cold water in the c

2) To calibrate your calorimeter cup, you first put 53 mL of cold water in the cup, and measure its temperature to be 21.1 °C. You then pour 41 mL of hot water, temperature 53.7 °…

2) To calibrate your calorimeter cup, you first put 53 mL of cold water in the c

2) To calibrate your calorimeter cup, you first put 53 mL of cold water in the cup, and measure its temperature to be 21.1 °C. You then pour 41 mL of hot water, temperature 53.7 °…

2) True or False (If statement is false, correct it so that it is true) a) Polym

2) True or False (If statement is false, correct it so that it is true) a) Polymers make up an exciting class of biomaterials. Polyethylene is a wonderful example of a simple cera…

2) Use the following liquid-vapor composition diagram for a mixture of two liqui

2) Use the following liquid-vapor composition diagram for a mixture of two liquids, Xand Y, to answer the given questions. Give al answers to two significant figures. 80 A. What i…

2) Use the following liquid-vapor composition diagram for a mixture of two liqui

2) Use the following liquid-vapor composition diagram for a mixture of two liquids, Xand Y, to answer the given questions. Give al answers to two significant figures. 80 A. What i…

2) Using the equations dH=TdS+VdP and dG=-TdS+VdP a) Show that (dH/dP) T = -TV(b

2) Using the equations dH=TdS+VdP and dG=-TdS+VdP a) Show that (dH/dP)T = -TV(beta)+V where beta = 1/V * (dV/dT)p b) Calculate (dH/dP)T for 1 mole of an ideal gas and for 1 mole o…

2) What is the pH of a 0.01 m solution of sodium acetate? Acetic acid is monopro

2) What is the pH of a 0.01 m solution of sodium acetate? Acetic acid is monoprotic with an equilibrium like H (Ac 10 (HAC) You can assume that the sodium dissociates completely f…

2) Which of the following is a bridged blcyclic alkane? A) cis- decal in B) bicy

2) Which of the following is a bridged blcyclic alkane? A) cis- decal in B) bicyclo[4.1.0jheptane C) bicyclol2 2 1]heptane D) bicyclo[3 2.0]heptane E) none of the above 3) What te…

2) Which of the following is not an example of an unchecked exception? A) IOExce

2)        Which of the following is not an example of an unchecked exception? A) IOException B) NullPointerException C) NumberFormatException D) InputMismatchException 3)         …

2) Which of the following processes always results in an increase in the energy

2) Which of the following processes always results in an increase in the energy of a system? A) The system loses heat and has to work done on it by the surroundings B) The system …

2) Which of the following processes are spontaneous? 3) The normal freezing poin

2) Which of the following processes are spontaneous? 3) The normal freezing point of chloroform (CHCl3) is -63.5 degree C. 4) The element aluminum (Al) freezes at 660. Degree C, a…

2) Which of the following statements regarding the NBOs of allyl anion is true?

2) Which of the following statements regarding the NBOs of allyl anion is true? a. The C-C pi bonding orbital in this molecule is polarized. b. The O-H sigma bonding orbital conta…

2) Which of the following statements regarding the NBOs of allyl anion is true?

2) Which of the following statements regarding the NBOs of allyl anion is true? a. The C-C pi bonding orbital in this molecule is polarized. b. The O-H sigma bonding orbital conta…

2) Which statement about the following chemical reaction is not correct? A) For

2) Which statement about the following chemical reaction is not correct? A) For every mole of nitrogen gas consumed, two moles of ammonia gas are produced B) For every two moles o…

2) Write the equilib and for the the decomsim constant expressions for the forma

2) Write the equilib and for the the decomsim constant expressions for the formation of N 04(g) from NO2tg) composition of N204(g) to NO2(g) Step 1: Write out a balanced chemical …

2) You have toseparate 4-toluic acid (a strong acid, pKa 4.36 – look upstructure

2) You have toseparate 4-toluic acid (a strong acid, pKa 4.36 – look upstructure) from 4-bromoaniline (a base – look up structure).Assume the two substances don’t react with each …

2) You have toseparate 4-toluic acid (a strong acid, pKa 4.36 – look upstructure

2) You have toseparate 4-toluic acid (a strong acid, pKa 4.36 – look upstructure) from 4-bromoaniline (a base – look up structure).Assume the two substances don’t react with each …

2) You have toseparate 4-toluic acid (a strong acid, pKa 4.36 – look upstructure

2) You have toseparate 4-toluic acid (a strong acid, pKa 4.36 – look upstructure) from 4-bromoaniline (a base – look up structure).Assume the two substances don’t react with each …

2) You want to determine the concentration of Fe2+ in a solution. You decide to

2) You want to determine the concentration of Fe2+ in a solution. You decide to determine the Fe2+ concentration by means of a redox titration with potassium permanganate. You use…

2) Zr2+ Express your answer in condensed form in order of increasing orbital ene

2) Zr2+ Express your answer in condensed form in order of increasing orbital energy as a string without blank space between orbitals. For example, [He]2s22p2 should be entered as …

2) a 36.0 g peice of copper metaal is intially at 100 degreeC. it is dropped int

2) a 36.0 g peice of copper metaal is intially at 100 degreeC. it is dropped into a coffee cup calorimeter containing 50.0 g ofwater at a temperature of 20.0 degree C. after stirr…

2) b. During the titration of HClO4 solution with 0.1032 M NaOH, quantitative an

2) b. During the titration of HClO4 solution with 0.1032 M NaOH, quantitative analysis student Alchol became distracted and overshot the end point. A fellow student , I.   M. Smar…

2) polar protic solvent are ideal for sn1 reaction polar protic solvent are pola

2) polar protic solvent are ideal for sn1 reaction polar protic solvent are polar and have Hydrogen attached to polar group polar aprotic solvent are ideal for sn2 reaction polar …

2) what is the PH of solutions containing naOh, nacO3, nh3, and nh4cl. Explain y

2) what is the PH of solutions containing naOh, nacO3, nh3, and nh4cl. Explain your results with chemical reactants B. Base and Basic salutions 1. Reaction aqueous sodium hydrosid…

2) which of the following liquids was the unknown? water 0.9982 toluene 0.8669 c

2) which of the following liquids was the unknown? water 0.9982 toluene 0.8669 chloroform 1.4832 3) if the unknown liquid had been water, what would the volume have been? 4) what …

2) why does each successive ionization take more energy? Why? ( 2nd vs 3rd vs 4

2) why does each successive ionization take more energy? Why? ( 2nd vs 3rd vs 4 etc.) Second lonlization Energy: The energy needed to remove a second er lectron from an atom: M+ (…

2)- Briefly prioritize the order of acidity of the alcohols by giving the approx

2)- Briefly prioritize the order of acidity of the alcohols by giving the approximate Pka values of the compounds below in decreasing order. Note, you must place your answer withi…

2). 10pts.: a). Calculate the wavelength of an electron with a velocity of 2.99

2). 10pts.: a). Calculate the wavelength of an electron with a velocity of 2.99 x10^6 m/s b). Calculate the wavelength of an neutron with a velocity of 2.99 x10^6 m/s (Hint: use t…

2)Hot water contains more _______________ than hot air. Select one: a. heat of f

2)Hot water contains more _______________ than hot air. Select one: a. heat of fusion b. molecules c. specific heat d. atoms 4)Freezing water can ____. Select one: a. All of the c…

2)Hot water contains more _______________ than hot air. Select one: a. heat of f

2)Hot water contains more _______________ than hot air. Select one: a. heat of fusion b. molecules c. specific heat d. atoms 4)Freezing water can ____. Select one: a. All of the c…

2)If Br2 Goes to 2Br and it is a first order reaction with a rate constant of .0

2)If Br2 Goes to 2Br and it is a first order reaction with a rate constant of .019M M-1 S -1. What is the original concentration if after 210 seconds, the concentration is .23M? 3…

2)Water with density of 1000 kgm is pumped from the open reservoir to the open c

2)Water with density of 1000 kgm is pumped from the open reservoir to the open cank as shown in details in the figure. The total equivalent length of the pipeline (including strai…

2, (a) The Heisenberg Uncertainty Principle (HUP) can be expressed as, (i) Defin

2, (a) The Heisenberg Uncertainty Principle (HUP) can be expressed as, (i) Define all the terms in the expression. (ii) Explain, with reference to the expression, what you underst…

2, + 1 points SerCP11 15P007 My Notes Ask Your Teacher Two uncharged spheres are

2, + 1 points SerCP11 15P007 My Notes Ask Your Teacher Two uncharged spheres are separated by 2.10 m. If 1.50x 1012 electrons are removed from one sphere and placed on the other, …

2, 4, 7 , 9 Conparing the Phyaleal Propezties of Various Related Subatances UNSU

2, 4, 7 , 9 Conparing the Phyaleal Propezties of Various Related Subatances UNSUBSTITUTED 183 150 7 CH,C1 Whys larger than MP Why do larger methyl tel-and tetrahalogens have highe…

2, 5.00 mL of 5 .00 x 10\'1 M Fe(NO)); are mixed with 5.00 mL of 0.5 Mi HNO. Cal

2, 5.00 mL of 5 .00 x 10'1 M Fe(NO)); are mixed with 5.00 mL of 0.5 Mi HNO. Calculate the molarity of Fe in the diluted solution. 3. 5.00 mL of s.00x101 M Fe(NO,) are mixed with 2…

2, Answer the following questions: A) A Phosphorous forms 4 different chloro spe

2, Answer the following questions: A) A Phosphorous forms 4 different chloro species: PCl3, PCI4-,PCl5 and PCI6-. Which one or ones will be polar and which one or ones non-polar? …

2, Calculate the electrode potential of the following half-cells. (1) Ag/Agl(s),

2, Calculate the electrode potential of the following half-cells. (1) Ag/Agl(s), I. (0.015 M) (E degree Agl/AG = -0.151 V) (2) A silver wire placed in a solution that results from…

2, R rensted-Lowry (BI) Definition of Acids aad Bases Brensted Lowry (BL) acids

2, R rensted-Lowry (BI) Definition of Acids aad Bases Brensted Lowry (BL) acids and bases are defined as follows An acid is a substance that donate a proton 0 donor). A base is a …

2, effected if some undissolved Ca was allow goes from solution mass IC ass of C

2, effected if some undissolved Ca was allow goes from solution mass IC ass of Co was amo uut of tvu solid mass vsases. Tw a und ca OH 2 will wot the total so the sol will thon th…

2, why is the pH and % dissociation of the HCl solutions different than that of

2, why is the pH and % dissociation of the HCl solutions different than that of the acetic acid solutions of similar concentration? Explain the physical basis of these observation…

2,6-dimethylaniline was synthesized using the following procedure: Placed 22.557

2,6-dimethylaniline was synthesized using the following procedure: Placed 22.5575 g (approximately 0.10 mol) SnCl2 ? H2O into an Erlenmeyer flask. Dissolved the SnCl2 ? H2O by add…

2- 2a. Platinum tetrachloride, [PtCl4], belongs to the point group Dah. Determin

2- 2a. Platinum tetrachloride, [PtCl4], belongs to the point group Dah. Determine how the s, p, and d orbitals of the Pt ion would behave when operated on by all of the D4h symmet…