Chemistry concepts and calculations

a. The atmospheric pressure is below the triple point. b. The surface pressure i

a. The atmospheric pressure is below the triple point. b. The surface pressure is above the triple point. c. The surface temperature and pressure are above the critical point. d. …

a. The atmospheric pressure is below the triple point. b. The surface pressure i

a. The atmospheric pressure is below the triple point. b. The surface pressure is above the triple point. c. The surface temperature and pressure are above the critical point. d. …

a. The cations Ba^2+ and Sr^2+ can be precipitated as very insoluble sulfates. I

a. The cations Ba^2+ and Sr^2+ can be precipitated as very insoluble sulfates. If you add sodium sulfate to a solution containing these metal cations, each with a concentration of…

a. The first step in the synthesis of trichloromethane (chloroform) from natural

a. The first step in the synthesis of trichloromethane (chloroform) from natural gas (methane). b. The final step in the industrial production of nitric acid. Chemical Principles …

a. The nonvolatile, nonelectrolyte chlorophyll , C 55 H 72 MgN 4 O 5 ( 893.50 g/

a. The nonvolatile, nonelectrolyte chlorophyll, C55H72MgN4O5 (893.50 g/mol), is soluble in ethanol CH3CH2OH.   Calculate the osmotic pressure generated when 10.4 grams of chloroph…

a. The pH meter was improperly calibrated, so that the pH readings on the instru

a. The pH meter was improperly calibrated, so that the pH readings on the instrument were 0.3 pH units too low. A. pKa would be too low and Ka would be too high B. pKa would be to…

a. The pKa of acetic acid is 4.7. What is the buffering range of this acid and i

a. The pKa of acetic acid is 4.7. What is the buffering range of this acid and its conjugate base? Explain your answer. b. Calculate the volume of 6 M acetic acid needed to prepar…

a. The student gathered the data below. Crystal Violet (3.0x10 -5 M) NaOH (0.10

a.      The student gathered the data below. Crystal Violet (3.0x10-5 M) NaOH (0.10 M) DI water Initial reading (mL) Final reading (mL) Volume added (mL) Initial reading (mL) Fina…

a. The system does work and energy will be given off. b. The system does work an

a. The system does work and energy will be given off.    b. The system does work and energy will be absorbed.       c. Work is done to the system and energy will be given off. d. …

a. The “solute” is the chemical that gets dissolved, and it should be set to “Dr

a. The “solute” is the chemical that gets dissolved, and it should be set to “Drink Mix.” Adjust the volume to 1.0 L and the solute amount to 1.0 mole. What is the molar concentra…

a. Tie line b. dew point line c. Equilibrium line d. bubble point line For the s

a. Tie line b. dew point line c. Equilibrium line d. bubble point line For the same figure above, when all of the feed have completely condensed to liquid, the composition of the …

a. Tie line b. dew point line c. Equilibrium line d. bubble point line For the s

a. Tie line b. dew point line c. Equilibrium line d. bubble point line For the same figure above, when all of the feed have completely condensed to liquid, the composition of the …

a. Tl 2 O 3(s) +NH 2 OH (aq) ® TlOH (s) +N 2(g) (basicsolution) b. Cr 2 O 7 2 -

a.   Tl2O3(s) +NH2OH(aq) ® TlOH(s) +N2(g)       (basicsolution) b.   Cr2O72-(aq)+ I-(aq) ®Cr3+(aq) +IO3-(aq)         (acidic solution)

a. To a 25 mL volumetric flask at 25.0°C was added 0.100 g of ethylene glycol, H

a. To a 25 mL volumetric flask at 25.0°C was added 0.100 g of ethylene glycol, HOCH2CH2OH; the flask was filled to the calibration mark with water. What was the osmotic pressure o…

a. Unhealthy exhaust results from the combustion of octane (C8H10) in automobile

a.  Unhealthy exhaust results from the combustion of octane (C8H10) in automobile engines via the following reaction. C8H18(l) + 25O2(g) 16CO2(g) + 18H2O(g) Assuming the gasoline …

a. Using your text as a reference, describe the origin of the lunar maria. Note:

a. Using your text as a reference, describe the origin of the lunar maria. Note: The number of impact craters within an area can give an estimate to the age of the surface. Basica…

a. Volume of NaOH used = Final Burette reading - Initial Burette reading =36.54m

a. Volume of NaOH used = Final Burette reading - Initial Burette reading =36.54ml-1.8ml=34.74ml b. Number of moles of KHP consumed = given amount of KHP÷Molecular weight of KHP =5…

a. What are the conformers of coumarin? b. What are the enantiomer and diasterio

a. What are the conformers of coumarin? b. What are the enantiomer and diasteriomer of coumarin? c. What is the most acidic hydrogen on coumarin, and why? e. what is a constitutio…

a. What condition must be met for an atomic group can act as a ligand in a compl

a. What condition must be met for an atomic group can act as a ligand in a complex relationship? b. Discuss why some elements react with each other to form ionic compounds, while …

a. What is the [HF] in a 1.60 M solution of HF? When nickel (II) nitrate dissolv

a. What is the [HF] in a 1.60 M solution of HF? When nickel (II) nitrate dissolves in water the nickel (II) cation gets hydrated by six water molecules. It is this hydrated ion th…

a. What is the entropy change if two mole of liquid water is heated from 20 C to

a. What is the entropy change if two mole of liquid water is heated from 20 C to 100 C under constant pressure? Cp=75.5 J/mol*K over this temperature interval. b. Calculate (delta…

a. What is the entropy change if two mole of liquid water is heated from 20 C to

a. What is the entropy change if two mole of liquid water is heated from 20 C to 100 C under constant pressure? Cp=75.5 J/mol*K over this temperature interval. b. Calculate (delta…

a. What is the first step in the general mechanism for electrophilic aromatic su

a. What is the first step in the general mechanism for electrophilic aromatic substitution? b. What is the driving force for losing a proton as the last step in electrophilic arom…

a. What is the formula weight of magnesium iodide? (in amu) b. How many magnesiu

a. What is the formula weight of magnesium iodide? (in amu) b. How many magnesium ions are present in 2.86 x 10-4 mol of magnesium iodide? Enter your answer in scientific notation…

a. What is the function of the mobile phase for developing a chromatogram? b. Wh

a. What is the function of the mobile phase for developing a chromatogram? b. What is the chemical composition of the mobile phase in this experiment? a. What is the function of t…

a. What is the maximum possible composition (as mole fraction) of Oxygen (O2) di

a. What is the maximum possible composition (as mole fraction) of Oxygen (O2) dissolved that could be dissolved in the water, x*A? b. What is the maximum possible molar concentrat…

a. What is the name of the process where ions, such as Cl & HCO, pass through pr

a. What is the name of the process where ions, such as Cl & HCO, pass through protein channels? What is the name of the process that moves small molecules, for example 02 &amp…

a. What is the order with respect to A? (number) b. What is the order with respe

a. What is the order with respect to A? (number) b. What is the order with respect to B? (number) c. What is the overall order of this reaction? (number) d. If the concentration o…

a. What is the order with respect to A? (number) b. What is the order with respe

a. What is the order with respect to A? (number) b. What is the order with respect to B? (number) c. What is the overall order of this reaction? (number) d. If the concentration o…

a. What is the pH and what is the volume of added acid at the equivalence point?

a. What is the pH and what is the volume of added acid at the equivalence point? b. At what volume of added acid is the pH calculated by working an equilibrium problem based on th…

a. What is the pH of a 0.25 M lactic acid (CH3(CH2)COOH) solution? Known: pKa =

a. What is the pH of a 0.25 M lactic acid (CH3(CH2)COOH) solution? Known: pKa = 3.85 I set the equation up as CH3(CH2)COOH –> CH3(CH2)COO- + H3O+. My final answer I got was pH …

a. What is the pH of a 0.397 M solution of ammonium chloride? The K b for ammoni

a. What is the pH of a 0.397 M solution of ammonium chloride? The Kb for ammonia = 1.8 X 10-5. When nickel (II) nitrate dissolves in water the nickel (II) cation gets hydrated by …

a. What is the pH of a 1.08 M solution of (CH 3 CH 2 ) 2 NH that is also 0.49 M

a. What is the pH of a 1.08 M solution of (CH3CH2)2NH that is also 0.49 M in diethylammonium sulfate, the salt of it's conjugate acid? The Kb for (CH3CH2)2NH = 6.9 X 10-4. b. In o…

a. What is the pH of a 1.14 M solution of CH 3 COOH that is also 0.65 M in galli

a. What is the pH of a 1.14 M solution of CH3COOH that is also 0.65 M in gallium acetate, the salt of it's conjugate base? The Ka for CH3COOH = 1.8 X 10-5. b. In one flask you are…

a. What is the precipitate which forms and then dissolves upon adding H_2 SO_2 t

a. What is the precipitate which forms and then dissolves upon adding H_2 SO_2 to the mixture of K^+, [Al (H_2 O)_2 (OH)_4]^- and OH^-? b. Calculate the volume of 6.0 M sulfuric a…

a. What is the rate law for the uncatalyzed reaction? a. \ m rate={\\it k}[Ce^{4

a. What is the rate law for the uncatalyzed reaction? a. m rate={it k}[Ce^{4+}]^2[Tl^+] b. m rate={it k}[Ce^{4+}][Tl^+] c. m rate={it k}[Ce^{4+}] d. m rate={it k}[Ce^{4+}][Tl^+]^2…

a. What is the rate law for the uncatalyzed reaction? a. \ m rate={\\it k}[Ce^{4

a. What is the rate law for the uncatalyzed reaction? a. m rate={it k}[Ce^{4+}]^2[Tl^+] b. m rate={it k}[Ce^{4+}][Tl^+] c. m rate={it k}[Ce^{4+}] d. m rate={it k}[Ce^{4+}][Tl^+]^2…

a. What is the theoretical pH at the stoichiometric equivalence point for the ti

a. What is the theoretical pH at the stoichiometric equivalence point for the titration of the weak acid? ACETIC ACID REACTING WITH NaOH Hint: Your volume at the stoichiometric po…

a. What is/are the name(s) of the functional group(s) that contain oxygen in the

a. What is/are the name(s) of the functional group(s) that contain oxygen in the two molecules we are using in this lab (ethyl acetate and butyl acetate)? b. Define “boiling point…

a. What must happen in order for a reaction to occur? Molecules must -be the sam

a. What must happen in order for a reaction to occur? Molecules must -be the same -attract one another -be liquid or gas -collide b. What else must happen for molecules to react? …

a. What would you predict about the reactivity of potassium in hydrochloric acid

a. What would you predict about the reactivity of potassium in hydrochloric acid compared to potassium in water? b. Which atom would you expect to have the largest radius, boron o…

a. When the temperature is changed from 25°C to 56.8°C, the reaction rate triple

a. When the temperature is changed from 25°C to 56.8°C, the reaction rate triples. What is the Activation Energy (Ea) in kJ/mol for this reaction? b. A first order reaction has a …

a. Which compound is more volatile? b. If the half-width of the COS peaks is 0.0

a. Which compound is more volatile? b. If the half-width of the COS peaks is 0.080 minutes, calculate the column efficiency N c. If the oven temperature is increased, will H2S elu…

a. Which processor has the best performance? b. Find the number of instructions

a. Which processor has the best performance? b. Find the number of instructions and the number of clock cycles for the program 4. The below table shows five different processors P…

a. Will iron nails rust when it is exposed to pure water (pH = 7). Support your

a. Will iron nails rust when it is exposed to pure water (pH = 7). Support your answer with calculation and data found in the standard potential table. Write down the oxidation an…

a. Write C++ statements that include the header files iostream and string. b. Wr

a.    Write C++ statements that include the header files iostream and string. b.    Write a C++ statemtn that allows ou to use cin, cout, and endl without the prefix std:: c.    W…

a. Write a FractionDemo program that instantiates several Fraction objects and d

a.   Write a FractionDemo program that instantiates several Fraction objects and demonstrates that their methods work correctly. Create a Fraction class with fields that hold a wh…

a. Write a Java class that declares named constants to represent the number of k

a. Write a Java class that declares named constants to represent the number of kilometers (1.852) and the number of miles (1.150779) in a nautical mile. Also declare a variable to…

a. Write a Matlab program that will display a menu, which will let the user to:

a. Write a Matlab program that will display a menu, which will let the user to: 1. Enter a function in symbolic format 2. Displays the nth root of the function, n is entered/selec…

a. Write a balanced equation for the reaction of trisilicate ion, Si3O84-, with

a. Write a balanced equation for the reaction of trisilicate ion, Si3O84-, with H+. b. Which od the anacid components will exhibit more than a one to one mole ratio, when titrated…