Chemistry Questions and Answers June 10, 2020

What is the relationship between embalming fluid and methanol poisoning?

Compared to an uncatalyzed reaction, an enzymecatalyzed reaction O produces different products. O requires a higher temperature. O occurs at a faster rate. uses less substrate. requires more energy.

What is the pOH of an aqueous solution of 2.43x102 M hydroiodic acid 3

A sample of gas contains 0.1800 mol of NH3(g) and 0.2250 mol of O2(g) and occupies a volume of 17.6 L. The following reaction takes place 4NH3(g) 502(g)4NO(g) 6H2O(g) Calculate the volume of the sample after the reaction takes place, assuming that the temperature and the pressure remain constant.

A sample of gas contains 0.1300 mol of H2(g) and 6.500102 mol of 02(g) and occupies a volume of 11.1 L. The following reaction takes place 2H2(g) 02(g)2H20(g) Calculate the volume of the sample after the reaction takes place, assuming that the temperature and the pressure remain constant.

Titration was carried out on 20 ml of 0.250 M HNO2 solution with 0.250 M NaOH solution in the following volumes. Calculate the pH for each volume i) 0.00ml ii) 8.00ml iii) 20.0ml

You decide to perform step three of the green pathway first. You start with 1.81 g of the starting material. After the reaction is complete, you weigh 1.18 g of the product, which is a dry solid. What is the percent yield for the third step of the green pathway Show all of your work CH3 HNO, H,SO, NaOCI CH, HO, CH,OH H NO, HNO, H,SO, OCH NaOC1

1 Complete the given chemical reaction and write the molecular equation, total ionic equation and net ionic equation for the given chemical reaction. magnesium oxalate reacts with aluminum iodide

Starting with (S)1chloro2methyl2butanol and 3bromo1methyl1cyclohexene propose a synthesis(not a mechanism) for the following compound. HO

Can linear dichroism spectroscopy be used for molecules in a static solution or in a flowing solution Explain your answer. Check all that apply. O For linear dichroism spectroscopy to be effective, the molecules must have a preferred spatial orientation, as in a static solution. O For linear dichroism spectroscopy to be effective, the molecules

A0.25g of quinine in antimalarial tablet was dissolved in sufficient 0.1 M HO to make 1 wv solution. A 10ml aliquot was then diluted to 250 ml with the acid. The fluorescence intersity for the diluted sample at 347.5 nm provided a reading of 140. A standard 120 ppm quinine solution registered 280 when measured under conditions identical to those

Benzoic acid is slightly more polar than acetanilide. Predict (draw) the resulting TLC plate (and all Rf values) if benzoic acid, a cospot of benzoic acid and acetani lide, and acetanilide were each run using a l2 hexanesethyl acetate solution. Label each spot.

1 Why are some liquids more viscous than others 2 If using a large ball, is the viscosity will be change Why

Check the box under each molecule in the table below that is an isomer of this molecule If there are no isomers, check the none of the above box under the table. none of the above

Determine the concentration of K+ in Molarity in a) 0.0850 M K2HPO4 ; b) 1.25 g KOH in 100 mL.

0.1012 M H2SO4 in 10.00 mL of solution requires 23.31 mL of NaOH for neutralization. What is the molarity of the NaOH?

30 L cylinder contains 450 g N2 gas at 22 C. How many grams of N2 must be released to reduce the pressure in the cylinder to 0.5 atm if the temperature remains constant?

We need O2 gas with a density of 2 g/L at 34 C for a particular application. What is the pressure of the O2 in mmHg at these conditions?

Below, you can see the chemical equation for methane combustion. When 1 mol of methane is reacted with O, 890.3 kJ energy is released. CH(8) 20(g) CO(g) 2H0(1) AH 890.3 kJ a) For a complete combustion of 18000 L CH, at 20 C and 770 mmHg, how much energy (heat) will be released b) How many kg of CH, should be reacted for releasing 3x10 kJ of

Use Hesss law to determine AH for the reaction Co(g) 08) CO(8), given that C(graphite) 08) CO(g) AH 110.54 kJ C(graphite) O(g) COg) AH 393.51 kJ

5. You are cooking beef soup. According to chemical analysis, unfortunately, beef contains 0.2 ng 2,3,7,8TCDD per kg beef. Fat content of beef is 5 (i.e., 2 g per 40 g). You put 40 g beef to make one liter soup. After cooking, you see drops of oil floating over the soup. The volume of all floating oil drops is estimated 2 mL. Octanolwater

To the nearest tenth of a kcalmole, what is the energy difterence beteen the fulowing te comswan Te multiple of two methyls being gauche (0.8) and that the difference is calculated Erergefrer g 010 D E Answer

Which of the following compounds have the same empirical formula Choose one or more O CH4O O C2H8O4 C3H1203 O CSH2005 CAH1404 O CioH40010

If the kinetic energy of an electron is increased four times, the wavelength of the de-Broglie wave associated with it would become?

Consider the species 72Zn, 75As and 74Ge. These species have: a.the same number of electrons. b.the same number of protons. c.the same number of neutrons. d.the same number of protons and neutrons. e.the same number of protons and neutrons

What is the radius, in nm, of the second Bohr orbit of the Na +10 ion?

A 0,0529 B 0,0176 0,0705 0,0081 E 0,0192

In an NMR diffuison experiment, a minimum 30 reduction in the nomalised NMR signal attenuation value (E) is requried to achieve a relatively accurate diffusion measurement (e.g. a starting E value of 0.90 corresponding to the starting gradient strength value and a final E value of 0.60 corresponding to the final gradient strength value). It is

Based on the chemical reaction below, determine the following N2 (e) 3H2 (e) 2NH3 (8) K, 4.51 x 10s at 450 C (R 0.08206 LatmmolK) Nonequilibrium conditions 98 atm NH3, 45 atm N2 and 55 atm H2 (a) Determine Qp (b) Which direction (toward products or reactants) must the mixture shift to achieve equilibrium (if not at equilibrium)

Under standard conditions, is the oxidation of ubiquinol (Coenzyme Q) by O2 sufficiently exergonic to drive the synthesis of ATP? If yes, how many ATP can be synthesized assuming 100% efficiency?

1 At a certain temperature this reaction follows secondorder kinetics with a rate constant of 0.443 M 1 S. 2SO3 (g) 2S0, (g) O2 (g) Suppose a vessel contains SO, at a concentration of 1.49M. Calculate the concentration of SO, in the vessel 5.70 seconds later. You may assume no other reaction is important. Round your answer to 2 significant

Determine the name of product(s) for the following reactions (disregard no reaction, then submit the name of the reactant. 1) NaBH4 2) H0 N

Consider a uniport system where a carrier protein transports an uncharged substance A across a cell membrane. Suppose that at a certain ratio of Ainside to Aloutside , the AG for the transport of substance A from outside the cell to the inside, Aoutside Ajnside is 14.9 KJmol at 25C. What is the ratio of the concentration of substance A inside the

Determine the precision and accuracy of these data for warfarin. Sample 1 Sample 2 Sample 3 Known concentration (ngmL) 26.4 63.7 283 37.7 58.1 295 22.8 44.3 275 Experimentally determined values (ngmL.) 28.1 56.9 253 24.9 76.2 299 24.8 55.8 245 29.0 58.9 271 Sample 1 precision (relative standard deviation) 19.1 ,Sample 1 accuracy (relative error)

The Lewis structure of carbon monoxide is given below. The hybridization of the carbon atom in the molecule is c0 sp3 Sp2 sp O spd O spd2 68F

For this prelab, all solutions were prepared exactly as described in the lab manual all data were also collected exactly as described. Use the following data to calculate the percent by mass of ASA in the tablet Mass of pure ASA (used for stock solutions) 160 mg SolutionAbsorbance 0.064 2 0.128 0.192 4. 0.256 0.320 Mass of tablet 446.1 mg

Look at the plot below. Assuming all trials are from the same gel filtration column fraction, Explain what is likely going on in each trial. Why do these plots differ What is the relationship between the plot result and the relative amount of fraction used in each trial LDH assay 0.8 0.6 0.4 Trial 1 Trial 2 0.2 Trial 3 20 40 60 Time (sec) A340 nm

Give 2 reasons for the difference indicated and how each reason applies to both reactions BUT (no rearrangement)

The solubility of Ca 3 (PO 4 ) 2 is 2.50 x 10 -3 g/L . what are the molar concentrations of calcium ion and phosphate ion in a saturated solution ? and calculate the Ksp for this reaction (Mwt of Ca 3 (PO 4 ) 2 310.18 g/mole

Follaoing Speciicati m Water Such as Pra 7.5 the bofler problem which WPLL arie due t above spedfication is there n boler Do 105 ppm.Dscus

1. A lattice contains stacks of parallel planes with the dspacings listed in the table below. CuK, radiation (A 1542A) is passed through the lattice at the incident angles (0) shown. At which values of 0 do each of the stacks of parallel planes give a diffracted beam 8 5 10 14 17 20 24 36 dspacings (A). 888 444 3.19 234 225 189 131 100

The cost of 20m installed reactor column is 5000 in 1970. The reactor is cylindrical with flat top and bottom and the height is 2m. The construction material of reactor is made from special alloy which resist corrosion. If the entire outer surface of the reactor is to be covered with an insulation block, estimate the present total cost for the

Identify the functional groups.

HO, functional group centered on carbon 3 Choose... functional group centered on carbon 4 Choose. functional group centered on carbon 6 Choose.. functional group centered on carbon 1 Choose... functional group centered on carbon 2 Choose... functional group centered on carbon 5 Choose...

Read the following and answer questions within the narrative on the Report sheet. Use the information given to determine the presence absence of each of the sixteen cations. Upload the Report sheet as a pdf. Your unknown gave a violet color on the first drop tested with methyl violet paper. What do you do next Be very specific about steps,

Consider the following Lewis structure Which of the following is a resonance structure of this (Carbon can never expand an octet, but can sometimes fall short of one.) Lone pairs and double bonds are shown but formal charges, if present, are not. 1235 PM P Iype here to search 87F Partly sunny A 0 , C. 1235 PM 87F Partly sunny A P Iype here to

Consider the following reaction NH3 BCI3 H3NBCI3 Choose the correct label for each species from the dropdown menu NH3 Select Neither Lewis base BCI3 Lewis acid H3NBCI3 (Select

The IUPAC name of the following compound is O 2Ethyl1,5dimethyl1cyclohexene O 5Ethyl1,3dimethyl1cyclohexene O 1Ethyl2,4dimethyl1cyclohexene O 2,4dimethyl1ehtyl1cyclohexene What is the major organic product obtained from the following reaction Br,

Calculate the concentration of FeSCN2+ for solutions 1-5. Do this using stoichiometry (you can assume the excess SCN1- drives the reaction to completion). Reaction: Fe3+(aq) + SCN-(aq) FeSCN2+(aq)

Calculated Using Stoichiometry PreLab Calculations Test Tube Felinitial (M) SCNliaitial (M) FESCN (M) Absorbance 1 0.000 0.104 0.176 4 0.436 0.563 2. 3.

1) Rank the following titrations in order of increasing pH at the halfway point to equivalence (1 lowest pH and 5 highest pH). 4 200.0 ml of 0.100 M (C,Hs), NH (K, 1.3 x 10) by 0.100 M HCI 1 100.0 ml. of 0.100 M KOH by 0.100 M HCI 2 100.0 ml. of 0.100 M HC Hs02 (K, 1.3 x 10) by 0.100 M NaOH 5 100.0 mL of 0.100 M HI by 0.100 M NAOH 3 200.0 ml.

The degradation of chlassicogen in the liver is carried out with the stimulation of chloccon hormone, which activates the formation of cAMP that stimulates the phosphrylase of Glycogen? T or F

show graph and explain graph and show that the graph extend to y axix @100 percent example : you can use excell much better thankyou.

analysis test used the sieve no. 4, 10, 16, 20, 40, 100, with the mm opening of 4.76, 2, 1.19, 0.84, 0.42, 0.149, respectively. Sieve No. 4 10 16 20 40 100 Table 4.3a. Sieve Analysis Test Results Mass of crushed Retained Cumulative Retained (g) pine cone scales retained (g) 357.49 233 88 91.96 7475.41 426.37 225.32 1410.42 25.35 16.58 6.52 5.35

If in the extraction of the components of Excedrin you had added the KOH first (before the K2HPO, ) how would this impact the extraction Draw a flow chart to show this, explaining why the extraction would or would not have been successful. Take into consideration the relevant pK, values and use what you have learned from chapter 3 in your text.

a. How can you tell by Infrared Spectroscopy that the reaction (Synthesis of an Active Ingredient in Tiger Balm: camphor) worked? How can you tell by 1 H NMR (proton nuclear magnetic resonance) that reaction worked? b. In the 1 H NMR of the oil (limonene), assign the proton for the cyclohexene double bond and the isopropylene double bond. What

1. Balance the following equations C7H14 02 CO2 H20 PCI3 H20 H3PO3 HCI QUESTION 2 Ammonia reacts with diatomic oxygen to form nitrogen monoxide and water vapor NH3 02 NO H20 When 40.0 g NH3 and 50.0 g 02 are allowed to react, what is the theoretical yield of this reaction If 30 g of NO is produced, what is the yield ,QUESTION 3 Aqueous

Find the molarity of sample 1 for trial one and sample 2 trial one.

Trial one Trial two Trial three Volume Sample 1 Starting volume AGNO3 2.00mL Final volume AGNO3 Final mass of A93ASO4 0.0370g 10.0mL 10mL 10.0mL 2.00mL 2.00mL 8.10mL 2.35mL 2.23mL 0.0370g 0.0370g Trial one Trial two Trial three Volume Sample 2 Starting volume AgNO3 Final volume AGNO3 Final mass of Ag3ASO4 0.0231g 10.0mL 10.0mL 10.0mL 2.00mL 2.00mL

CHEM 2A EXPERIMENT 2 LAB REPORT PART A (REMEMBER TO INCLUDE UNITS) 1. LENGTH OF PENCIL 1 a. IS THE LAST DIGIT EXACT OR JUST AN ESTIMATE ARE ANY OF THE NUMBERS EXACT DO YOU AGREE WITH THE LENGTH OF PENCIL 1 IN THE VIDEO 2. LENGTH OF PENCIL 2 a. IS THE LAST DIGIT EXACT OR JUST AN ESTIMATE ARE ANY OF THE NUMBERS EXACT DO YOU AGREE WITH THE LENGTH OF

3) Predict the products of the following reactions. (a) NI (b) d)

Name the following compounds according to the (new) IUPAC nomenclature rules. ce (a) CH3 (b) H. Br CHCH3 (c) Give rule also

Determine the electron geometry and molecular geometry of the underlined atom CH3OCH3.

Assume that during your vacation employment you work at a copper concentrator that uses a thickener to dewater concentrates. You are told that the underflow pulp volumetric flow rate is 269.52 mhr and the percent solids for the thickened pulp is 63. The solids density is 2.7 tm. The ratio of mass of water in overflow to mass of water in underflow

Pesticides are well adsorbed on activated carbon (AC) originally prepared from olive stones ( 1200m, 1.4 gm/ml). The maximum adsorption capacity is 0.003 mmol/ml of AC. Assume that the process of irrigation water treatment with a batch of 250 m3 contains 12 ppm flows BET isotherm (k= 0.064, n= 1.13), determines the volume of the bed needed to run

Name each of the following compounds. H3C H3C CH3 H3C H3C CH3 .CH3 CHO H3C CN

Draw all possible stereoisomers of benzylidene acetal and rank the stabilities of the stereoisomers from most to least stable. Use the following template.

0.

In the workup of the n-pentyl acetate reaction, how was the organic layer dried after the various aqueous washes were performed? How does this step dry the organic layer? Write the equation for a Fischer esterification that would produce n-pentyl acetate. Look up the price of each reactant as well as boiling points and water solubilities of

What is the target goal for the number of grams of algae (dry weight) produced per square meter per day? Group of choices 200 g 20,000 g 2000 g 2.0 g 20 g 21. What percentage of the dry algae weight corresponds to oil that can be converted to biodiesel? Group of choices 20% 10% 25% 40% 30%

The activation energy for the gas phase isomerization of cis-2-butene is 75.3 kJ. cis-CH3CH=CHCH3trans-CH3CH=CHCH3 The rate constant at 1.1210^3 K is 6.1310^-4 /s. The rate constant will be /s at 8.4610^-3 (blank) K.

Draw the structure of (2Z,5Z)3bromohepta2,5diene. Br A) B) Br D) Br Br A D

In the allyl radical, which Tt molecular orbital is singly occupied the bonding n molecular orbital the nonbonding n molecular orbital the antibonding n molecular orbital none of the above Other Under thermal conditions, (2E,4Z) hexadiene undergoes a. ring closure to yield conrotatory, cis3,4dimethylcyclobutene conrotatory,

3. The reaction mechanism and reaction coordinate diagram shown below are for the gas phase reaction of Az with B. Use these to help you answer parts a, b, c, and d. In the mechanism, Kea and Ka are the equilibrium constants at 298 K for steps 1 and 2, respectively. Az(g) 2B(g) 2AB(g) Renatton Ceardinade Diagram Pr A 28 2480 Step 1 Azlg) Bg)

labels, crop out extra lanes and write a figure legend to them.

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draw the structure below and Specify the building block formula b. Specify the biosynthetic pathway 3.

Gradient centrifugation is commonly used for which of the following separating organelles out of a homogenate measuring the concentration of proteins in a solution separating proteins in a solution isolating small molecules

Briefly explain the implementation of FIRST LAW OF THERMODYNAMICS in daily life.

Determine which base will work to deprotonate each compound in an acidbase extraction. OH Choose... H3C HC CH3 H2 H2 Choose... OH H2 OH Choose.. The choices are H3C. Only Hydroxide Only bicarbonate Hydroxide or Bicarbonate Neither hydroxide nor bicarbonate

What is unsafe in this Science lab Please circle at least five points and record how each incident is unsafe in the table below. (10 points) LABORATORY BEXBE DANDER LASER

Briefly explain the implementation of the FIRST LAW OF THERMODYNAMICS in daily life.

A certain reaction has an activation energy of 34.65 kJmol. At what Kelvin temperature will the reaction proceed 6.50 times faster than it did at 299 K T K TOOLS x10

Draw the curved arrow notation and products for the each elementary step described by the sequence shown here. Note that the products of each step should be used as the reactants in the next step, and you may need to draw in additional reagents as direct Remember to click on each box to see stepspecific instructions. 1. E2 involving H2N CI, 2.

Determine the best upper bound for the ground state energy Etd using the trial function (r) ear for an electron moving under the influence of the spherically 3D symmetric potential V(r) kr with k 0. Here 2 is an adjustable parameter.

According to inorganic chemistry, write down all the isomers of [H-Co(CO)(PH3)(PF3)]- and [Fe(CN)3(Cl)3]3-.H2O complexes, find the LAKE energies, and undergo John-Teller decomposition show them by drawing a figure.

8) What IR stretches do you expect in compound A Are these signals present in your extracted product Attach the IR of compound A and label its major peaks. 9) (3 pt) What IR stretches do you expect in compound B Are these signals present in your extracted product Attach the IR of compound B and labels major peaks

Ammonia (NH,) gas and oxygen (0,) gas react to form nitrogen (N,) gas and water (H,O) vapor. Suppose you have 2.0 mol of NH, and 11.0 mol of O, in a reactor. What would be the limiting reactant Enter its chemical formula below.

9. We have 6.00 m of ethane at 5.00C at 170kPa. What is the pressure if its volume is changed to 5.00 mat 25C

Why should k have nearly the same value for each of the above reactions Table A3 Determination of the Relative Rate Constant, k Mixture 1 2 3 Average k 3D 0.27906977 0.31914894 0.25 0.3 0.287

What is the calculated value of vibrational frequency and wavenumber of C-H stretching? Given, mass of carbon atom = 20x10^-24 g mass of hydrogen atom = 1.6x10^-24 g force constant of the C-H bond = 5x10^5 g s-2

13.7m 1200ms mms 3D 114 ,Is this an okay emai... M Gmail Question 6 01 pts How many sigfigs would the following answer have Not the answer, just the number of sigfigs it would contain. (IE. 2 2 4 has one sigfig. Answer would be 1) 1.035 9.0

Please show steps to slow for i P X xP soln solv solv 5.549 224.7 mm Hg (233.7 mm Hg) 0.08518xi 5.549

Use any reagent necessary to complete the following transformations.

OH e. f. Prenare the following amine

Use any reagent necessary to complete the following transformations.

a. C. b. d.

a) Calculate the Gibbs free energy (AG) of above reaction (last two digit of your student number 10) C b) Calculate the equilibrium constant of this reaction at (last two digit of your student number 10) C A O AO AG474100 (last two digit of your student nunmber) T(1) AX 0 AO AG211700 77,25 TU) Ba O BO AG386400 55,60 T () ,AOo B20(g) AOzp

The first of the so-called sulfa drugs to be discovered is the nonvolatile compound sulfanilamide(C6H8O2N2S), which dissolves readily in acetone(C3H6O). What is the vapor pressure of a solution containing 1.00 g of sulfanilamide dissolved in 10.0 g of acetone at 39.5, if the vapor pressure of pure acetone at this temperature is 4.0010 mm Hg?

a. Draw an energy diagram for this reaction. be sure to label axes, starting materials, any reactive intermediates and products. b. Draw the transition state of this reaction. If an atom has a positive charge indicate it with sigma+/-.

N3 Consider this exothermic SN2 reaction. N3 Br

Add curved arrows to draw the second part of the mechanism tautomerization of an enol to a ketone. CH, H,C CH, CH3 H,C CH, H.C CH, Edit Drawing

Add curved arrows to draw the first part of the mechanism tautomerization of a ketone to an enol. D. CH H3 D H CH CH3 H, Ha Edit Drawing

Propose a plausible mechanism for the following transformation Identify the most likely intermediate involved in the mechanism. Bromonium ion Enol Tertiary carbocation Primary carbocation eTextbook and Media

Consider the precipitation of anion X with metal cation M xM mX M,X (s) K M X The following equation relates the volume of added M (VM) to M and X at a given point in the titration, and the initial volume of the X solution (V), plus the initial concentrations of M (C) and X (C) xC mM xX mC mM xX . VM where X (KM r). Use a spreadsheet to

Green plants use light from the Sun to drive photosyntheses. Photosynthesis is a chemical reaction in whwch water (H,O) and carbon dioxide (CO,) chemically react to form the simple sugar glucose (C,H,O) and oxygen gas (0,). What mass of water is consumed by the reaction of 3.4g of carbon dioxide Round your answer to 2 significant digits.

Construct the phase diagram for the system, and draw in the tie-lines. 4. An aqueous solution contains 46% by weight of ethyl alcohol. Using the diagram of the preceding problem, find how much alcohol would be extracted from 25 g of this solution by 100 g of C 6 H 6.

3. The following data are for the system water alcoholbenzene at 25C. The first two columns give the percentages by weight of alcohol and benzene in one layer, while the third column gives the percentage by weight of water in the layer conjugate to these. Layer 1 Layer 2 C6H6 C2H5OH H20 1.3 38.7 9.2 50.8 20.0 52.3 3.2 30.0 49.5 5.0 40.0 44.8

In a pyrolysis process, the product gas analyzed 6.7 CO2, 0.2 02, 38.6 CO, 51.6 H2, 0.8 CH4, and 2.1 N2. It entered the combustion chamber at 95 F and a pressure of 36.0 in. Hg, and was burned with 42 excess air (dry), which was at 75 F and an atmospheric pressure of 29.4 in. Hg, 10 of the CO remained unburned. If the exit gas was at 29.4

Calculate the concentration of potassium cations, K (aq) phosphate anions, PO,3 (aq)) monohydro (aq)) and phosphoric acid, H3PO4 (aq) in a liter of 0.20 M potassium phosphate, K3PO4. Given the following information (1) H3 PO4 (aq) H20 (1) H, PO4 (aq) H30 (aq) Ka, 6.9 x 103 (2) H2 PO4 (aq) H20 (1) HPO,2 (aq) H3O (aq) Kaz 6.2 x 108 (3) HPO,