Chemistry Questions and Answers June 22, 2020

(a) Which of the following reactant concentrations could you use for experiment 3 in order to determine the rate law, assuming that the rate law is of the form, Rate k A B Choose all correct possibilities. O A 1.6 and B 1.2 O A 1.6 and B 1.8 E A 4.8 and B 0.6 O A 3.2 and B 1.2 O A 8.0 and B 0.6 O A 3.2 and B 0.6 E A 6,4 and B 0.6 O

Prepare .01L of 0.15 M acetate buffer from sodium acetate and .2 M HCl pH=4.5 Explain with Calculations.

1) The reaction is between an alcohol and Select) 2) What is the test used to check if the ester were formed (Select

A buffer is prepared by mixing 160 mL 1M CH 3 COONa and 400 mL 1M CH 3 COOH pK a = 4.74. What is the buffer capacity after adding 0.1 mole H + to 1L of the buffer solution? 1.87 M 1.40 M 0.46 M 1.67 M

The reduction of stannous sulphide by hydrogen takes place as follows SnS(s) H2(g) 2 Sn(1) H2S(g) The equilibrium constant (K) values was determined after studying the reaction over the temperature range 533 to 679c. The following data was recorded TC K (x 104) 533 10.6 582 16.1 631 27.6 679 46.2 Use the data to determine the enthalpy change (kJ

A certain mineral is described as a mixture of plumbojarosite (PbFe6 (OH) 12 (SO4) 4), lead (PB3O4), calamine (H3ZnSiO5) and wilemite (Zn2SiO4). Its percentage in Fe atoms is (270/29)% and its percentage in Pb atoms is (300/58)%. From a certain mass of ore processed, 48 [mol-ton] of Pb2S3 (containing 80% of initial Pb) and 5406.8 [tons] of Zn3

At a certain temperature the rate of this reaction is first order in H,CO, with a rate constant of 1.58 s H,Co, (ag) H,0 (aq) co, (aq) Suppose a vessel contains H,CO, at a concentration of 1.31M. Calculate the concentration of H,CO, in the vessel 0.430 seconds later. You may assume no other reaction is important. Round your answer to 2

The most common diluent in tablet is crosslinked PVP talc lactose starch paste ,The most common disintegrator in tablets is O Crosslinked PVP O Talc O Lactose Starch paste

Select ALL peptides that would be expected to adsorb to a strongcation exchange column at pH 5.0 ADDSYEEGGL AKKSYTTGGL AEESYRRGGL AGGSYLLGGL O AKKSYHHGGL

The most common disintegrator in tablets is O Crosslinked PVP O Talc O Lactose Starch paste

Wheels are constructed of all of the following materials EXCEPT: A. Steel. B. Plastic. C. Aluminum. D. Magnesium. In 2 min

3. Which of these symbols is used in connection with the intensity of absorption in the UVvisible region O T12 T13 On T On o O 0 o QUESTION 4 Why does increasing conjugation result to absorption at longer wavelengths O more conjugated compounds have more electrons than less conjugated compounds O the difference between the HOMO and LUMO

Zn 2+ ( Zn=30) complexes have been found to be either octahedral or tetrahedral. Why? Explain using diagrams.

For an SO2 emission rate of 22.000 Ib/day and an exhaust gas flow rate of 2.0 million m3/hour (after the scrubber) measured at 150F and 1 atm pressure, calculate the concentration of SO2 in the exhaust gases (ppm).

Ken dilutes 2.15 M of liquid sodium hydroxide (NaOH) in enough distilled water to make 20 mL of stock solution. What volume of this solution and distilled water (DI), when mixed will result in a solution that is approximately 1.61 M NAOH 20 mL stock solution and 40 mL of distilled water 30 mL stock solution and 50 mL of distilled water 40 mL stock

Explain 3 types of polarization.

Would individualization be possible if a piece of paper were torn into three pieces and the middle section destroyed? If so, what factors would you consider in attempting an individualization of this type?

Describe the properties of ammonium lauryl sulfate that make it a feasible surfactant. Properties can include strength, conductivity, solubility, reactivity, durability, and state of matter.

Design an algorithm to find (1, d)motifs in k sequences that have occurrences in at least k 1 sequences.

In the above reaction, the oxidation state of sulfur changes from to How many electrons are transferred in the reaction s2. Fe(OH)2S Fe 20H

In the above reaction, the oxidation state of silver changes from v to How many electrons are transferred in the reaction 2Ag Zn(OH), Zn Ag,0 H,0 20H

Calculate the crystal field splitting energy in KJmol for Fe(CN),1, if the wavelength of the most intensely absorbed light is 305 nm.

If two krypton atoms are held together by a stabilization energy of 1.005 kJmol at what temperature would you expect these atoms to transition from bound to unbound Show your thought process for full credit. W Pext dv W

What volume of a 0.155 mol L N23PO4 solution is necessary to completely react with 87.6 mL of 0.110 mol L CuCl2 Express your answer using three significant figures. V mL Submit Request Answer

The heat capacity of hydrogen may be represented by Cpm (1.554 0.00227) J K mol1 Calculate the change in entropy of the surroundings for the reversible heating of 1.9 moles of hydrogen from 268 K to 666 K. Express your answer in J K1 to 2 decimal places (X.XX). Question 4 0 1.5 pts The heat capacity of hydrogen may be represented by Cpm (1.554

A device emits radiofrequency signal at 106.5 MHz. What is the wavelength of the signal in m (speed of light is 2.998x108 ms) 0.335 None of other answers are correct 2.8 2.8x105 3.2x1010

How many atoms are in 2.4 g of uranium 0.01 3.4E26 6E26 6E21 O 1.7E26

In the lab, we use canola oil to produce biodiesel. The transesterification process requires oil and methanol to produce glycerol and biodiesel. The molecular structures of the reactants and products are shown below. Canola Oil H H H HC0CCH,),CC(CH,CH, H H H H H HC0C(CH,),CC CC(CH,),CH, H H H HC0C(CH,),CC(CH,),CH, ), , Methanol H HCOH H Glycerol H

A point-mass (m = 63.32 grams) is connected to a spring (stiffness k = 2500 dyne/cm) on a horizontal table. The non-stretched (i.e. equilibrium) position of the system is at x = 0. At time t = 0, the mass is stretched to x = 2 cm and let go. The system oscillates along the x-axis [neglect friction]: What is the period of oscillation, in seconds.

How many mm (millimeters) are in 19.70 km (kilometers)?

Type the names of the compounds that correspond to the formulas gven in the following table Note Ifuing a Roman mumeral, be sure to use () and not leave a space betveen the name of the element and the Roman numeral. Formula Compound Name K,PO, Feo Na0

What is the probability that a nitrogen molecule from a box of 25 o C has a speed 20 times higher than the mean speed of nitrogen; and how many particles in a box of 25 o C have speed between 200 and 300 m/s?

What is the IUPAC name of this polymer?

IUI ICH ICH IUH ICH ICH ICH IUH

Consider the reaction below. Which species is the strongest base HO NH2 NH3 O NH2 O CH3CH2CH20 O CH3CH2CH2OH O NH3

If the PH level of urine is less than 7, it means that it will be acidic. The case of the amorphous condition will be explained. 1 Urite 2 phosphate

Suppose there are two ships in the ocean, Ship A and Ship B. At 1:00 pm, ship A crosses point C going north at a constant rate of 4 miles per hour. An hour and a half later, ship B crosses point C going west at a rate of 5 miles per hour. Determine how fast these ships are moving away from each other at 4:00 p.m.

c) Coffee is decaffeinated industrially using supercritical (sc) CO2. One advantage to using scCO2 is that the polarity of the supercritical fluid can be tuned by varying temperature, pressure and cosolvent additives. However, the need for high temperatures and pressures makes generation of scCO2 impractical in a teaching lab setting. Based on its

Which statement about the structure shown below is correct CH3 H2C. CH2 H. H2C. CH3 O It is a hydrocarbon and an alkyne O It is a hydrocarbon and an alkane O It is a hydrocarbon and an alkene O It is not a hydrocarbon. It is an alkyne. O It is not a hydrocarbon. It is an alkene

Show with equations and text how you would calculate the pHT for seawater (S 35, t 25 C) that is in equilibrium with calcium carbonate (aragonite) if the alkalinity of the seawater is 2221.60 micromoleskg.

Why is the organic layer evaporated and not the aqueous layer in extraction?

What are the configurations for carbons 24 for the linea Fischer projection below CH2OH HOH H3CH H OH CHO O 2R, 3R, 4R O 25, 3R, 4S

The pressure above a pure sample of solid Substance X at 66. C is lowered. At what pressure will the sample sublime Use the phase diagram of X below to find your answer. solid liquid gas 100 temperature (K) Note your answer must be within 0.15 atm of the exact answer to be graded correct. I atm pressure (atm)

Identify whether 1 and 2 are chiral or not chiral. If present, indicate planes of symmetry. each structure are present Calculate how many of chiral and pseudo chiral centers for Assign every stereocenter for each structure What 1 and 2 to each other, OMe OMe ) OMe Meo Meol OMe OMe 1 2

Consider the SF6 molecule with SF bond length 1.561nm and the atomic mass of fluorine is 18.9984mu and of sulfur is 32.06mu. Calculate the minimum energy required to start the rotation of the molecule

Water is pumped at the rate of (Q = 85.0 L/s) through D (mm) diameter, smooth pipe (L=792.48 m) long to a reservoir where the water surface is (50.86 m) higher than the pump. Determine the gage pressure at the pump discharge. (Hp=..m) d=219.5

2. If the same vector is moved to (4,0,1), what are its cylindrical and spherical representations 5. Repeat Practice 2 in Part I using the new code by setting r (0,0,0).

Should GM contract the Chevrolet portfolio (consider market share, market growth, etc.) or add new additions? r

Cars Sonic Cruze Malibu Corvette Camaro Impala SS Sedan Spark SUVSCrossovers Equinox Traverse Tahoe Suburban Trax TrucksVans Colorado City Express Silverado Express Electric Vehicles Volt Bolt EV

This is technical drawing of the fork. We want to find a reaction force. Force apply from the bottom, 2 force will apply one of the force is 80478 N other one 21528 N.Angle is 45 degree.

R1.73 7.82 met R2.56 3.94 1.18 138 T 7.87 R3.94 7.87 7.87

A metal radiator is made from 26.0 kg of iron. The specific heat of iron is 0.449 Jglc1. How much heat must be supplied to the radiator to raise its temperature from 25.0 to 55.0C

Water is 56.3 g benzoic acid/1 L water at 100 degrees Celcius. While 1.7 grams of benzoic acid dissolves in 1 liter of water at 0 degrees Celsius. Find the volume of boiling water required to dissolve 0.26 g benzoic acid. Prove that 0.11 grams of benzoic acid was recovered after recrystallization. Also find the percent recovery of benzoic acid.

Using the enthalpy of gaseous water at 100C as the reference point (AH 40.66 kJmol above the value of water at 100C, above), plot AH(T) from 0 to 120C at 1 bar, assuming a temperatureindependent C, and assuming no phase transitions (i.e., condensation). Compute AH at 25C.

A student dissolves 0.724 g of compound A in the minimum amount of solvent required at 100 C. When the solution is cooled to 0 C, how much of compound A, in mg, remains dissolved?

The reaction of 5.10 g of carbon with excess O 2 yields 13.2 g of CO 2 . What is the percent (%) yield of this reaction?

Rank the following anions in terms of imcreasing boling pont Cbp) by filling up the table. Write only the Roman Numeral number (1,li l as indicated for each compoundt Pank Compound Ist Chighat BP 2nd

The work of 95 g of N2O5 at an initial pressure of 6.5 bar and temperature of 55C that is being compressed is 20.2 kJ at a constant external pressure. What is the external pressure XXhat ie he temperature ofhenzene at 25 bar and 0 391 Imol according to the

You measured an AOU 1.3 mg L. How much CO, (in uM) was produced from this AOU

Compare and contrast the allotropes of carbon (diamond, graphite, graphene, and C) in terms of structure bonding intermolecular forces melting points electrical conductivity.

Select the single best answer. What is the difference between the mass number of an isotope and its atomic number the number of protons the number of isotopes the number of neutrons the number of electrons

What is the balanced equation of the reaction of caffeine with methylene chloride and ammonium hydroxide?

An aqueous solution of glucose (CH2O is prepared by dissolving 7.838 g in sufficient deionized water to form a 50.00ml solution. What is the molarity of the solution O 1.568 10M O 0.1568 M O 0.8701 M O B.701 x 10 M

Gaseous azomethane, CH3NNCH3, decomposes in a firstorder reaction when heated CH3NNCH3 (g) N2(8) C,He (g) The rate constant for this reaction at 600 K is 0.0216 min. a If the initial quantity of azomethane in the flask is 2.27 g, how much remains after 0.0490 hour g

2. Answer the following questions for the redox reaction below 2 MnO4 (aq) Cl (aq) H2O (1) 2 MnO2 (s) CIO (aq) 2 OH (aq) a) What is the oxidation number of Mn in MnO, b) What is the oxidation number of Cl in Cl0, c) Which species is the oxidizing agent d) Which species is the reducing agent e) How many electrons are transferred Text

Explain how you would modify the ligand system to prevent ring whizzing of the cyclopentadienyl ligands in ferrocene. Draw the structure of the modified ferrocene complex

A water at a drinking water plant has an alkalinity of 4103 eqL at a pH of 9.5. a) Find the TOTCO3 of this water, assuming carbonate is the only significant weak acidbase species b) 1.5103 M HOCI is added to the water for disinfection. What will be the final pH and alkalinity of this water

A blood plasma sample is electrophoresed. The sample is applied in the middle of the gel (le, theforigin is halfway down on the gel) and the gel is stained with a lipoproteinspecific stain. The pl values of the lipoproteins in this sample are shown below Chylomicron 8.6 LDL6.8 VLDL 6.5 HDL5.2 To answer the question below, you make the assumption

Write Lewis structures that obey the octet rule for each of the following, and assign oxidation numbers and formal charges to each atom: (a) OCS, (b) SOCl2 (S is the central atom), (c) BrO3-, (d) HClO2 (H is bonded to O).

A small beaker was found to have a mass of 27.847 g. A 25.00 ml sample of ethylene glycole in water (antifreeze solution) was pipetted into the beaker. The mass of the beaker with the solution was 54.759 g. Calculate the density of this solution. Express your result to the proper units and number of significant figures.

a. Mention 2 natural products of everyday use that could be used as acid-base indicators. Argue your answer. b. Sort the acidity of the following products in descending order: Soap - ph: 8.0 coffee - ph: 5.2 tomato - ph: 4.0 milk of magnesia - ph: 11 stomach acid - ph: 1

If the following compound reacts with an electronrich compound, which position(s) do you predict most likely to react at 01 O 2 0 3 0 4 O 1 and 3 O 2 and 4 O 3 and 5

Calculate AH for each of the reactions below. In each case, state whether you believe AS will be positive, negative, or close to zero a) Br HBr AH kJmole AS will be b) Br HBr H20 AH kJmole AS will be c) Br HBr Br2 AH kJmole AS will be

What is the compound on the arrow what the do and cen we replacing

OH CH3 H2NCNH C2H500C. C2H5OK HCI FCH2COOC2H HCOOC,H5 CH3S H. 30.1.3.1 30.1.3.2 HN F2 CF3OF HN 30.1.3.3 30.1.3.4

Observe the periodic Table to answer the questions. 1IA 21IA 13IIIA 14IVA 15VA 16VIA 17VIIA 180 Period 2 Li Q Ne Period 3 Period 4 Y The element having least ionisation energy is a) Li b) CI c) Y d) Z

Observe the periodic Table to answer the questions. 1IA 21IA 13IIIA 14IVA 15VA 16VIA 17VIIA 180 Period 2 Li Q Ne Period 3 Period 4 Y The element having least ionisation energy is a) Li b) CI c) Y d) Z

What types of intermolecular forces are present in liquid and solid samples of the organic compound given as a Lewis structure below What types are not present Explain your answers H. dipole moment 1.77 D

Using the models of the molecules (black C, white H), determine each of the following for models of compounds 1. molecular formula 2. empirical formula 3. molar mass 4. mass percent composition

The pOH of an aqueous solution of 0.360 M codeine (a weak base with the formula C18H2103N) is Submit Answer Rotry Entire Group 2 more group attempts remaining

Construct (S)2butanol looking up its C2C3 bond Note Drag and drop the groups onto the template. CH, 3 H CH, CH3 COH OH CI Br NH, CHO 2. In the space next to each letter, indicate whether the corresponding molecule (shown in the diagram below) is chiral or achiral. H Br Br Br H Br H Br B In the space next to each letter, indicate whether the

Describe some definitions in international business and how each of them connect to one another. The concepts which require definition and then relation to one another are. How they are connected to one another. Documentary sale Seller Bank--Exporters Bank Buyers Bank--Importers Bank INCO Term Transfer of Risk of Casualty Loss vs. Transfer of

Construct (S)2butanol looking up its C2C3 bond Note Drag and drop the groups onto the template. CH, 3 H CH, CH3 COH OH CI Br NH, CHO 2. In the space next to each letter, indicate whether the corresponding molecule (shown in the diagram below) is chiral or achiral. H Br Br Br H Br H Br B In the space next to each letter, indicate whether the

Classify each of the following compounds. The possible classifications are as follows alcohol ketone carboxylic acid Part E ether aldehyde alkene COOH Check all that apply. O alcohol O ether O ketone O aldehyde O carboxylic acid alkene Submit Request Answer

Calculate the hydrogen ion concentration of vinegar that has a pH level of 3.0.

Calculate the flow rate (in mLhr) of 800. mg of ribavirin in 10. mL of D5W infused at 0.54 mcgkgmin ordered for a patient who weighs 224 lbs. Ribavirin is used to treat viral haemorrhagic fevers.

Arrange the following elements by charge. core Highest charge core Kr Se Ge K Lowest core charge

Nitrous oxide (N20) is produced by bacteria in the natural denitrification process. It is chemically inert in the troposphere, but in the stratosphere it is degraded photochemically. The average concentration of N20 in the troposphere is about 251 ppb, and its residence time there is 10.5 years. What is the global rate of production of N20 in

The reaction of BH3 with cyclooctadiene results in an unusual compound, 9 borabicyclo3.3.1nonane this electron deficient molecule is dimeric BH3. SMe2 (CH2OME)2 Draw an MO diagram for the core B2H2 unit that shows the nature of the three centertwo electron bonds.

Write the molecular, complete ionic, and net equations for each combination of reagents. A) Ammonium nitrate and sodium bromide B) Ammonium nitrate and sodium sulfate C) Ammonium nitrate and sodium hydroxide D) Ammonium nitrate and sodium carbonate E) Silver nitrate and sodium bromide F) Silver nitrate and sodium sulfate G) Silver nitrate and

Use KrgerVink notation to show 1.ZnO (Zn 1+x O) 2.Fe 2 O 3

1. Know the overview and background of the company and how they become successful. 2. Understand how JOLLIBEE FOOD CORPORATION (JFC) can compete in their homelands against big global firms that have entered the market. 3. Explore the problems and opportunities associated with overseas expansion.

What would be the concentration of a new solution prepared by taking 56.6 ml of a 2.20 Mstock solution in a 500 ml volumetric flask and adding sufficient volume of water to make up the solution to the 500 ml mark O 0121 M O 00732 M 1.10M O 0249 M O 0203 M

What is the molarity of ZnCl, that forms when 25.0 g of zinc completely reacts with CuC, according to the following reaction Assume a final volume of 275 ml. Zn ts) CuCl, laal ZnCl, lag) Cu ts) O 0.731 M O 117M O 105 M O 129M O 1.01 M

Which of the following aqueous solutions is a weak electrolyte O CICI la OHF la O HCI al O HINO, laal

Calculate the E for the following voltaic cells. a. 2Na Fe2 2Na Fe b. 3S0 12H 2Al 3SO2 2AL3 6H20 c. 2S 40H 02 2S2 2H20 (basic solution)

Consider the cell reaction at 25C where n 3. AG E K a 24KJ 0.120 V 0.114

5. Calculate the E, AG and K at 25C for the reaction, 2Mno, 4H Cl2 2MN2 2C10, 2H20

a) Find the volume of BaCl 2 . 600mL of 3.00% (w/v) aqueous BaCl2 from a 0.400 M BaCl2 solution. b) Find the volume of HCl. 1.00 L of 0.285 N HCl starting with a 6.00 solution of the reagent.

Alter the structure below to show CUA. C opy aste OH OH HO OH

Which non-hydrogen groups are eclipsed in the highest energy conformation? compound (1s-3r)-3-chlorocyclohexane

Highest Energy 2nd Lowest Energy Lowest Energy Newman projection Heat of formation C1C4 bond distance C1C2C3 bond angle C1C2C3C4 dihedral Whith nonhydrogen groups are eclipsed in the highest energy conformation (2 pts) Which nonhydrogen groups are anti to one another in the lowest energy conformation (2 pts)

Write the balanced net ionic equation for the overall cell. a. Cd Cd2 Sb3 Sb b. Pt Cr3, Cr20,2 CIO , CI Pt