Chemistry questions and answers in November 2022

Help. 3. The following results were obtained from a batch experiment to study the decomposition of a species, A (conc. in mol I-). t [sec] 0 10 25 50 100 250 500 1000 2000 5000 [A] 1 0.994 0.985 0.970...

. [OH ] =30x1037 M Express your answer using two decimal places. Submit Bequest Answer Part B HO ] -43 10-3 M Express your answer using two decimal places. OVO 0 0 ? PH Submit Request Answer Part C ...

. Fe2(SO4)3 + KOH K2SO4 + Fe(OH) 3 a. Balance the chemical equation. b. Get the mole ratio from balanced eq. c. How many moles of Fe2(SO4)3, Ferric Sulfate is needed to react with Potassium Hydroxid...

don't solve this page^^, I attached it for the equations if needed i only need the postlab questions . Part B Calculations: Heat of a Reaction / Hess's Law For the Zn reaction: 1. Assuming t...

Help. 1. Provide a mechanism for the following reaction. 2.5 mol% Pdadbag 7.5 mol% (R,R)-L* O OH 10 mol% PhCO,H 10 mol% EtzN OBn DCE, 30 C OBn Ph Ph O O NH HN PPh, Ph2P (R,R)-L*

. Directions: Answer the following problems systematically. Show your solution by attaching the photo of your solution paper. AllC3 + H2O CH+ Al(OH) 3 a. Balance the chemical equation. b. Get the mo...

7. Now suppose that the activity coefficients of Ni2+ and Cl- are not 1.00, but rather that they are YNI2+ = 0.455, YC-0.755. Remember, activity coefficients would change when, for example, non-partic...

-When the ice is melting the temperature is relatively unchanged. -When all of the ice is melted and the water heated, the temperature increases. -When the water reaches the boiling point, the tempera...

PLATE ACTIVITY #1 Balance the following redox reaction equations using the half-reaction method. Show the step-by-step procedure of balancing. Box your final balanced equation. Use a different color o...

Which of the following requires the most amount of energy? Group of answer choices Melting water Heating water to the boiling point vaporizing the water

Help. Question 25 0 / 1 pts You want to make 200 mL. 1% Agarose gel containing 0.5 ug/mL of ethidium bromide. Usually, the stock solution of ethidium bromide is 10 mg/mL. The volume of ethidium needed...

Chemistry Draw an inversion-recovery NMR experiment, indicating how it is used for the measurement of T1. Upload your drawing in the response area below.

How do I calculate the concentration in molarity. . standand + original 2 (0.19 ) ( 15ml ) = Q (17ml ) ML 1. 59 = Cq ( 17 m ) ) ) C2 = 0. 08 89 / m) standard + standard + original CV = CV (0. 19 ) ( ...

Fill in chart. CHALLENGE PACK: Polyatomic lons - Are groups of differently type bonded atoms (covalently bonded atoms) that act together like an anion or cation, either transferring or gaining electro...

Provide a summary of the following topics, 1. Molar mass determination 2. Gram-to-gram stoichiometry conversions 3. Charles' law 4. Combined gas law 5. Osmolarity 6. Neutralization reactions

Complete the table below for calculating the formula mass of the ionic compound cobalt(II) oxide. Formula: Number Ion Formula Atomic Mass Mass of Ions of ions Cation U X 1 = U Anion U X 1 = U Formula ...

Hi can anyone help me with questions 6-11 :) this is for chemistry 30 for voltaic cells, cell potential, electrolytic cells, corrosion, cell stoichiometry. 6. For the electrolysis of Naclcars, the net...

How much energy (in kJ) is required to vaporize 100.0 grams of water? ∆H fus = 6.02 kJ/mol ∆H vap = 44.0 kJ/mol

How much energy (in kJ) is required to heat 100.0 g of water from 0.00 C to 100.0 C? ∆H fus = 6.02 kJ/mol ∆H vap = 44.0 kJ/mol C water = 4.184 J/gK Note: Think which equation you will need t...

I have no idea about this question. Please help!. If 30.5 g of LiBr are dissolved 350.0 g of water at 20.0 °C in an insulated container, a temperature change is observed. The pH of solution of LiBr i...

How much energy (in kJ) is required to melt 100.0 grams of ice? ∆H fus = 6.02 kJ/mol ∆H vap = 44.0 kJ/mol

In the following video you see a beaker of ice being continuously heated. Using a computer program (I recommend excel or google sheets(free)) recreate the plot below. How to make a chart or graphLin...

Please explain to me how to solve. Chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric acid, HCI(aq), as described by the chemical equation MnO, (s) + 4 H...

22. (3 points) Ultimately, the best way to prevent the emergence of resistance is to develop additional MPro inhibitors that are structurally distinct from nirmatrelvir, and then treat patients with b...

can someone help me to answer this questions. . Question 4 Status: Not yet answered | Points possible: 1.00 Which statements accurately describe soap? Select one or more: |:| Soaps are both hydrophob...

There are 6 different exposure data treatment levels (Tiers) in the Hierarchy of Exposure Classification in Occupational Epidemiology theory proposed by Dr. Checkoway in 1986. Please first choose 3 ti...

Question 24 Is it possibleto useexperimentabondanglesto determinewhich resonancestructureis moreimportant Notyet answered Selectone Markedoutof O a. No 1.00 b. Yes, using the bond angles with a centra...

2. Calculate the force between two touching grapefruits each with a radius of 0.08 meters and a mass of 0.45 kilograms. G U S S m1 0. 45 kg

. Information Use the following information to answer questions 8 and 9. P Flag question A lab technician performed the following tests on four solutions and recorded the results in the table below....

how to put on graph. 2. The following data was collected during a laboratory experiment. Effect of Salt on Boiling Water Time Temperature Temperature (min) (no salt) (with salt) C 25 25 40 35 CO O ANO...

Part B: Specific Heat of a Metal Metal is Mass of Empty Test Tube 24.315 Mass of Tube Plus Metal 68.697 Mass of Metal Temperature of boiling water 101.5 Initial T of water (Tw) 23.6 T after mixing (TF...

Trial 1 Trial 2 Volume of 1.0 M NaOH moles of NaOH Volume of 1.0 M HCI Initial T of NaOH(aq) 23.8 Initial T of HCI(aq) 24.1 Average initial temperature of 30.6 NaOH and HCI T after mixing 30.4 Tempera...

Hi can anyone help me with questions 1-5 :) this is for chemistry 20 on voltaic cells, cell potential, electrolytic cells, corrosion, cell stoichiometry. 1. the following two reactions are involved in...

Trial 1 Trial 2 Mass of NaOH 1.973 Moles of NaOH 0.049 Initial T of the Water 22.8 T After Mixing 29.0 Temperature Change AT -266.8 Specific Heat of water 4.18 J/g.C 4.18 J/g Mass of the mixture (wate...

Given info: Weight of tea leaves : 4.989g Weight of caffeine in tea leaves: 0.053 (per bag) Weight % caffeine in tea: 1.08% Lethal dose for a 700g rat: ??. MSDS sheets state that the lethal dose of ca...

1) If a 250. mL solution contains 0.020 lb of dissolved NaCl. What is the molarity of the solution. Show work using the equation function. Plan: M= molsolute Lof solution Numerator: Find the moles ...

Please say which ones are correct. . Click on all of the images below that would result in a polar molecule with a permanent molecular dipole moment. Assume all outside atoms are identical unl...

. The Incredible Crushing Can Curricular Content: In this experiment, the students will describe the properties of air, specifically that air: has mass/weight and volume . expands to fill a space ex...

The relative retention of two compounds in gas chromatography is 2.5 on a 0.21 mm plate height column and the capacity factor of compound 1 is 3.12 a) What is the length of the column if the resolutio...

Glucose fermentation takes place through the following reaction: C6H 1206(aq) - 2CHO(aq) + 2 CO2(g) If 2.50 grams of CH1206 were placed in a sealed container having a temperature of 200 'C and a volum...

Help. 31. In post-mortem cases, it is recommended to collect blood from where? Explain why. (4 points) 32. Which of the following statements is FALSE? I Biotransformation/metabolism reactions expose o...

DEVELOPE A BID EVALUATION SHEET FOR OUR PUMP HOUSE PROJECT

. Trial #1 Specific Heat of Unknown Metal (J g-1 K-1): Trial #2 Specific Heat of Unknown Metal (J g-1 K-1): Average Specific Heat of Unknown Metal (J g-1 K-1): Parts Per Thousand: Molar Mass of Unko...

Identify the main type of bonding and the type of solid for each of the following a) SiO 2 b) CH 4 c) Cr d) Na 2 S e) C f) CaO

Help. d. For a first order decay rate, at what temperature will a sample containing 5.0 x 1014 ketonic acid molecules per liter decompose at the rate of 1.0 x 10"2 ketonic acid molecules per lite...

Enzymes how are the structures of the enzymes how enzymes affect the activation energy how to control the activity of the enzyme cite at least three references

Answer questions 4 to 7. 4. What is the pH of a solution having a hydrogen ion concentration of 1 x 102 M? Show your calculations. 5. Is the solution in question 4 acidic, basic, or neutral? What is t...

. Question 1 (0.5 points) Saved _II The Lewis structure of BFg is best described using resonance structures. [3:] True :1 False Question 2 (0.5 points} '15- Listen F The Lewis structure of XGF2 i...

Experiment 13 - ACIDS, BASES, AND SALTS 2. Draw a circle around the letter of the pair that would not make a typical buffer solution: a. sodium acetate and acetic acid b. NazHPO, and NaH2PO4 c. KHCO3 ...

. Postlab Questions: Continued 3. Calculate the enthalpy change for the allotropic transformation of graphite into diamond using the following data C (graphite) + 02(g) - CO2(g) AH = -390.5 kJ C (di...

. Postlab Questions: Show all work, use significant figures and circle the final answer for full credit. 1. A metal sample weighing 45.23 g is heated to 100.00 C. It is placed in 38.64 g of water in...

. For the ZnO reaction: 1. Assuming that the density of the HCI solution is 1.00 g/mL, calculate the mass (g) of the HCI solution for the ZnO reaction. Hint: this will be a number larger than twenty...

. PART A: Trial 1 Trial 2 metal sample (g): 26 . 0 62 3 metal sample (g): 26 . 06 2 g initial temperature 101 18C initial temperature of metal (C): of metal (C): 103. 4 . C water sample (g): 35, 8 1...

. The combustion of 1.919 g of carbon disulfide, CS, (1), in a bomb calorimeter with a heat capacity of 4.20 kJ/ C results in an increase in the temperature of the calorimeter and its contents from ...

This entire question can be written on paper. Consider the following molecule: NNO (the atoms are connected in this order) A. Write one Lewis structure for it. (include formal charges) B. Draw 2 addit...

ΔH = +572 kJ is required for the decomposition of water by the reaction 2 H 2 O( ) → 2 H 2 (g) + O 2 (g). When the enthalpy is included in the balanced equation we get 572 kJ + ...

. A student places a block of hot metal into a coffee cup calorimeter containing 155.9 g of water. The water temperature rises from 22.4 °C to 34.3 °C. How much heat (in calories) did the water ab...

At constant volume, the heat of combustion of a particular compound is −3595.0 kJ/mol. When 1.837 g of this compound (molar mass=102.11 g/mol) was burned in a bomb calorimeter, the temperature of...

QUESTION 14 For each of the following sets of quantum numbers, indicate if they are possible or not. If not possible, give an explanation. This should be entered Set 1: n = 4 1= 3, ml = -2, ms = +1/2 ...

. How does it compare with the maximum work from the combustion of 133 g of CH18(1)? Maximum work from the combustion of octane = kJ

Give a clear handwritten answer with explanation...For the following compounds, draw both possible chair conformations and indicate which chair conformation is more stable. . quan

. At constant volume, the heat of combustion of a particular compound is -3595.0 kJ/mol. When 1.837 g of this compound Learning (molar mass = 102.11 g/mol) was burned in a bomb calorimeter, the temp...

18. RESULTS, pH and pH Indicators Table 2 Column Column Column Column Column Column Indicator 2 3 4 5 6 Universal

Give a clear handwritten Detailed Solution..choose the correct reagents . Uning the reagents listed in the table below, show how to Bring about the following conversion (Specify the reagents you w...

Help. Cost (aq) and TI (aq) react according to the following chemical equation: TI (aq) + 2 Co3+ (aq) = T13+ (aq) + 2 Co2+ (aq) The relevant half reactions (taken from Appendix H) are copied below: T1...

the first option u can choose reducing agents, emulsifying agents, alkaline bases for 2nd option u can choose dirt, acid, water for 3rd option u can choose acid, dirt, water for the 4t...

At constant volume, the heat of combustion of a particular compound, compound A, is −3761.0 kJ/mol. When 1.295 g of compound A (molar mass =124.85 g/mol) is burned in a bomb calorimeter, the temp...

data: mass =71.5g delta T= 11.9 . measuremen 4. Calculate qsol, the heat absorbed by the reaction mixture using your value of AT. Assume that the specific heat capacity of the solution is no...

. 2. [-/9 Points] DETAILS WAS OSATOMSCHEM1 8.3.WA.011. A chemist combines 11.7 L N, gas, 34.5 L O, gas, and 17.5 L Br gas in a reaction vessel at STP. The gases react according to the following equa...

. 9. [-/5 Points] DETAILS Calculate the mass in grams of 3.30 L of NO gas at 45.0'C and a pressure of 729 mm Hg (1 atm=760 mm Hg. grams NO

Refer to the following structure. List 3 things that are wrong with it. Then, draw an acceptable Lewis structure. H H

Are the following molecules polar or nonpolar (a) CH2C/2 (b) 503 (c) SO2 (d) NH3

1. The ions at the surface of the solid are pulled into solution by the water molecules, where the process surrounds separate with water molecules.

QUESTION 9 Use bond energies provided in the supplemental information to calculate the enthalpy change for the following reaction. CH4 (9) + 3 Cl2 (g) -> CHCl3 (9) + 3 HCI (g)

I am getting 2.37 as the answer. I put 2.3 since they want significant figures but it is wrong. I am not sure what i am doing wrong. v O G canvas.westcoastuniversity.edu C + Homework # 5 P Determining...

For each of the following bonds, indicate the polarity of the bond using partial charges (6, 67) (a) N-B (b) NO (c) C-S (d) S-O (e) N-H (1) CI-O This can be done on paper. Then, answer the following q...

Write the ground state electron configuration for: A) Fe B) Al

5. Refer to the H1NMR spectra provided below. Provided the name and skeletal structure of the organic molecule responsible for producing the spectrum. Clearly identify which peaks are generated by whi...

You are to measure the rate of the following exothermic reaction in an insulated container: 2Al(s)+6HCl(aq)→2AlCl3 (aq)+3H2 (g) Which of the following is not a good way to measure the rate of the re...

1) Draw one Lewis structure for each of the following molecules. 2) Determine the molecular shape (for example: trigonal pyramid) 3) Indicate bond angles A) NC13 B) COCI2 C) SF6 D) TeCIA

E a = 0.0002 R E = 0.0002 * R = 0.0002 * 8.314 = 1.6628 x 10-3J/mol a

For the following reaction, 26.0 grams of bromine are allowed to react with 14.8 grams of chlorine gas . bromine ( g ) + chlorine ( g ) bromine monochloride ( g ) What is the maxim...

Chemistry 125 Complete the following reactions involving alkenes

Which examples correctly identify an unstable nuclide and the reason why it is unstable? Select all that apply. O Uranium-238 (238U) is unstable because it has too few electrons and cannot provide eno...

What is radioactive decay? O the process by which an atom of an unstable element can gain stability by emitting energy and electrons from its electron cloud the process by which an atom of an unstable...

What is one way an atom can become more stable? O by emitting particles and excess energy from its nucleus O by emitting heat from its electrons outside the nucleus O by absorbing particles and energy...

DATA Trial 1 Trial 2 Half-Life # remaining # of decayed Total # # remaining # of decayed Total # un-decayed in this trial Decayed un-decayed in this trial Decayed 100 0 100 1 st half life 57 43 43 54 ...

What are characteristics of beta particles? Select all that apply. high-energy photons emitted during radioactivity neutral charge O 2+ charge electrons emitted during radioactivity protons emitted du...

4. The process that will be used to create a hypothetical activity series for unknown metals A, B and C:

QUESTION 9 Use bond energies provided in the supplemental information to calculate the enthalpy change for the following reaction. CH4 (9) + 3 Cl2 (g) -> CHCl3 (g) + 3 HCI (g)

In Part A, we saw that the theoretical yield of aluminum oxide is 0.700 mol mol . Calculate the percent yield if the actual yield of aluminum oxide is 0.392 mol.

CONCLUSION: In part A, measurements were conducted at given pressure of 5, 10, 20. Experiment has shown that the pressure has a significant effect on the membrane filtration . Increasing pressure resu...

Please help me solve this. A student sets up the following equation to convert a measurement. (The ? stands for a number the student is going to calculate.) Fill in the missing part of this equation. ...

Molecule / Ion: OF -! Valence Bond Lewis Structure: Bond Order (VB): Bond Order (MO): Number of sigma bond: (VB): Molecular Orbital Diagram using shorthand notation: Number of sigma bonds (MO): Number...

Valence Bond Lewis Structure: Bond Order (VB): Bond Order (MO): Number of sigma bond: (VB): Molecular Orbital Diagram using shorthand notation: Number of sigma bond: (MO): Number of pi bond: (VB): Num...

The fluorenone reduction performed proceeds without facial selectivity. Is fluorenone prochiral? Why or why not?

. 4. Calculate the value of K. from the following equilibrium concentrations: [FeSCN2+]= 1.71 x 10-4 M, [Fe3+] = 8.28 x 10-4 M and [SCN-]= 4.28 x 10-4 M 5. In this experiment, you will prepare stand...

. 2. Consider the following equilibrium of nitrous acid (HNO,), a weak acid. HNO, (20) + H,0- H,O (29) + NO 2 (29) Which direction will the equilibrium shift if, a. NaOH is added b. HCl is added 3. ...

. MY NOTES 17. [-/2 Points] DETAILS OSATOMSCHEM2 8.2.E.043. The effect of chlorofluorocarbons (such as CCI2F2 (9)) on the depletion of the ozone layer is well known. The use of substitutes, such as ...

To kick off our investigation into atomic physics, we will take a short trip down Memory Lane to learn about the development of quantum mechanics. Quantum mechanics is a subdiscipline of the field of ...

. 1. Referring to the experimental results, identify whether the meso- or enantiomeric-form of hydrobenzoin was isolated. Briefly explain why this stereoisomer was exclusively formed in this reactio...

What is the potential explanation of the phenomenon observed in the "Freezing of Light Beer" using thermodynamics? Reference : https://www.youtube.com/watch?v=W0fURJg-K0A

https://www.youtube.com/watch?v=FQyFHurneZ4. Review the video on the previous page Calorimetry of a Cheeto - Determine the Calories per gram After reviewing the video, you should be able to construct ...

need help THANK YOU. Instructions Research a real-world example of equilibrium. This may include photochromic lenses, carbonic acid in the human body, the Haber process, etc. Be sure to include the ...

What is the equation for finding the % error?? Please show me in steps. Weight of KCIO, = 2. 0 em Weight of test tube + KCIO, + Mnor- = 19.04 gm (weighing A) 17.04 Weight of test tube + KCI + Mn02 = 1...

. Use the References to access important values if needed for this question. Consider the following system at equilibrium where ? AH = 111 kJ, and Ke = 6.30, at 723 K: 2NH3 (g) - N2(g) + 3H2(9) When...

Study the reaction. Mg + S - MgS Assuming a common ion for Mg is Mg2+ and a common ion for S is $2-, how were electrons exchanged in this reaction? O Each Mg atom loses two electrons and each S atom g...

Q16. Determine the volume percent of a solution made by dissolving: a. 37.5 mL of butanol in enough ethanol to make 275 mL of solution b. 4.0 mL of methanol in enough water to make 25.0 mL of solution...

Study the reaction. Mg + S- MgS Assuming a common ion for Mg is Mg2+ and a common ion for S is $2-, how were electrons exchanged in this reaction? O Each Mg atom loses two electrons and each S atom ga...

. Assignment Objective . Use the moles from the previous discussion and solve for volume of gas produced. . Understand how P, V, n, and T are related when it comes to gases Directions In your post: ...

Study the reaction. 2Na + Cl2 - 2NaCI Which is true based on this reaction? O Cl2 is a reducing agent because Cl2 loses electrons and is oxidized to Cl. O Cl2 is oxidized to CI- because Cl2 loses elec...

. Thermite reactions are highly exothermic reactions between a metal oxide and a fine metal powder. The exothermic nature of the reaction is used for welding metal parts such as railway tracks. One ...

asap please help . Question 3 (1 point) SOy has acidic properties (50][g) + H2On - H250afaq) H2504lag) + H20 - Hyo*(aq) + HSO4 (ag) (50][g) + H2Op - HyO*(ag) + 502 (34) Question 4 (1 point) Magnesiu...

. AP Chemistry PROBLEM SET 32 1. Four vials labeled A - D contain sucrose, zinc, quartz (SiO2) and sodium chloride, although not necessarily in that order. The following table Melting Point High Hig...

Acids and Bases in our daily lives! Start by typing the heading Acids and Bases in two different paragraphs. List five acids and five bases we come across in our day to day activities under the correc...

For the following reaction, 6.88 grams of methane (CH 4 ) are allowed to react with 30.7 grams of carbon tetrachloride . methane (CH 4 ) ( g ) + carbon tetrachloride ( g ) dichloro...

chy 183 An investigator identifying a generic fiber such as _____ would observe it to be quick drying, wool-like, and retaining its shape.

How do you analyze the acetaminophen content of a new drug using a cyclic voltmeter?

. Determine the atomic number and valence orbital that is filling for the element that would appear below radium in the periodic table. Atomic number: Valence orbital:. Give the electron configur...

1. Answer the following questions. a. Draw the Lewis Structure for (NO,) 1. b. Are all the bonds in (NO:) ] the same strength? Explain why/why not. c. Will a single or triple bond between the same typ...

The solubility product, Ksp, of aluminum hydroxide is 1.1 x 10 -15 at 25 o C. Calculate the concentrations of aluminum and hydroxide ions in a saturated solution of aluminum hydroxide.

Calcium fluoride dissolves in water to the extent of 0.00170 g per 100 mL (at 25 o C). Calculate the Ksp for calcium fluoride at this temperature.

The solubility product, Ksp, of strontium carbonate is 1.10 x 10 -10 at 25 o C. Calculate the solubility of strontium carbonate in mol/L.

Can you help answer all of these questions I really need help! Thank you! . / Focus Question: Are all atoms of an element alike? cteristics? How does the combination Background: How do we classify at...

3:15 3:30 3:45 Use the formulas in Chapter 2 of your textbook, and for each of the recipes in this week's module that pertain to your team (A, B, C or D) increase the batch size (as you would often do...

For the following reaction, 79.0 grams of barium chloride are allowed to react with 70.6 grams of potassium sulfate. BaCl2 + K2SO4 -> BaSO4 + 2KCl What is the maximum amount of barium sulfate that ...

please help . Question 5 (1 point) Sulfuric acid is dissolved in enough water to make a 300 mL solution with a pH of 1.5. Match the correct compounds with letters corresponding to letters to write t...

Please help me to do this step by step! Thank You! . Assignment Objective . Review the abundance of material by creating an infographic Learn from your peers as well as teaching your peers Create a q...

please help with these questions . Determine the solution ph range based on the indicator evidence below: -Thymol blue - yellow -Phenolphthalein - colorless -Chlorophenol red - red -Bromothymol blue...

The half-life of 14 C is 5730 years. A sample contains 92.1 % of the 14 C that it would contain if it were still part of a living being. What is the age (in years) of this sample?

The reaction A(aq) ---> B(aq) + C(aq) is a first order reaction. The half-life of A(aq) is 88.5 s at 25.0 o C and its half-life is 66.0 s at 45.0 o C. What is its half-life (in s) at 65.0 o C?

The reaction A(aq) ---> B(aq) is a first order reaction with respect to A(aq). The concentration of A(aq) is reduced to 25.0 % of its initial value in 1.59 minutes. What is this reaction's half-lif...

1. CIRCLE the equilibrium constant (K) for a galvanic cell constructed from zinc metal in hydrochloric acid at 25 .C under standard conditions. a) 0.76 b) 27.3 c) 108 d) 2.07 x 104 e) 5.13 x 1025

Pressure of a sample of 6.5 L of Cl gas is increased and the gas goes from 105 kPa to 125 kPa. What is the final volume of this gas?

If on an average a Teflon polymer has 100,000 monomer units and each monomer of Teflon has the formula C2F4, what is the molar mass of the polymer?

7) A flask of volume 1.00 L contains 8.00 g of Oz and 3.00 g of He at 0.00 C. Calculate the total pressure.

. 3. For the following reaction: 2HI (8) <> H2(8) + 12(8) Ke = 0.0025 at 800.0 K Assuming you start with 8.00 moles of H2, and 8.00 moles of Iz in a 2.00 L vessel, what are the concentrations ...

8) Calculate the specific heat of carbon, graphite, (in J/g.C) if a 125.5 g sample of graphite is heated to 125.C in an oven and then placed into 200.0 g of water at 19.8C and the water temperature ri...

14. Glycerol has a higher surface tension than water. What can you say about the relative strength of the intermolecular forces in the two compounds? Which has a higher boiling point? 15. Using the...

. From the equilibrium concentrations given, calculate Ka for each of the weak acids and Kb for each of the weak bases. Specify whether you calculate Ka or Kb. (4 marks each; 12 total). a) (H30*) = ...

A 15.0-mL sample of benzene at 22.0 °C was cooled to its melting point, 5.5 °C, and then frozen. How much energy was given off as heat in this process? (The density of benzene is 0.80 g/mL, its spe...

. 12. [-/3 Points] DETAILS Review: FeO has a molecular geometry of: (Note: Only one attempt at this question) O FeO is ionic, and does not have a molecular geometry O linear O bent O trigonal planar...

. 11. [-/6 Points] DETAILS (Note: Only one attempt at this question) Review: PCI; has a molecular geometry of O linear O bent O trigonal planar O trigonal pyramidal O tetrahedron and is O nonpolar O...

. 9. [-/5 Points] DETAILS Calculate the mass in grams of 3.30 L of NO gas at 45.0'C and a pressure of 729 mm Hg (1 atm=760 mm Hg. grams NO

. 8. [-/4 Points] DETAILS (Note: Only one attempt at this question) According to KMT: Gas particles decrease in (average) kinetic energy with an increase in temperature. O True O False The gas parti...

Iupac name for 3-Methyl-1-butanol with 1) Ethanoic Acid 2) Propanoic Acid 3)Butanoic Acid

Iron (III) chloride reacts with sodium hydroxide to produce iron (III) hydroxide and sodium chloride. How many grams of sodium hydroxide reacts with 10.5 grams of iron (III) chloride? How many grams o...

and Enthalpy ESULTS: ble 1: Pressure and temperature data for methanol. Ptotal / kPa Pair / kPa Pump / kPa Temperature / C Temperature / K Initial 98. 73 293 . 5 Data Point 1 103. 38 20.5 293.5 Data P...

hello, looking for help with finding the percent error for my lab. thank you for your time. 3:18 . . . Summary Data Table Heat of Combustion: Magnesium CHEZ 101L Section Name Lab Partner Date DATA Rea...

Gaseous butaneCH3CH22CH3will react with gaseous oxygen O2to produce gaseous carbon dioxide CO2 and gaseous water H2O. Suppose 2.3 g of butane is mixed with 15.4 g of oxygen. Calculate the maximum mass...

Can you please help me with question 1 of the analysis. Thank you:). SCH 4U Lab: Determining Concentration and pH for Calcium Hydroxide Name: Arcan Partner: Introduction: A titration is the precise ad...

3. Galvanic/voltaic cells are widely used in batteries and accumulators for powering various electronic devices, digital equipment. The following are some examples of possible uses: recharging the bat...

Liquid hexane CH3CH24CH3 will react with gaseous oxygen O2 to produce gaseous carbon dioxide CO2 and gaseous water H2O. Suppose 59. g of hexane is mixed with 200. g of oxygen. Calculate the maximum ma...

What is the vapour pressure of water at 22.3 °C? Use linear interpolation to calculate the value. Answer: 20.2 mmHg

Need some assistance with concentration(data sheet) and the data analysis sheet.. Experiment #7 - Redox Titration of Fez to Fest Determination of Fe in Commercial Supplement Learning Objectives: . sta...

. Question 2 What volume of H at a pressure of 745 torr and a temperature of 20 "C can be prepared from the reaction of 15.0 g of H2O with 28g of iron? 4H-O(g) + 3Fe(s) --> Fe;04(5) + 4H2(8)...

. (D) Account fully for each of the following observations by referring to the structure and bonding of heterocyclic systems: (i) Furan is less aromatic than Pyrrole, Thiophene and Benzene. ii) Imid...

. (A) Explain clearly, with diagrams, each of the following observations: (i) Trimethyl acetaldehyde (2,2-Dimethylpropanal) does not undergo an Aldol condensation reaction when heated with base. (ii...

. (d) Explain clearly each of the following observations by referring to the structure and bonding of the relevant heterocyclic systems: (i) Aliphatic amines are stronger bases and better nucleophil...

Based on the following unbalanced equation, how many grams of KClO 3 must be decomposed to prepare 2.55 liters of O 2 gas collected at 22 degrees celsius and 1.08atm of pressure? KClO 3 (s) -----...

. (a) Give a brief account of any three of the following reaction types. Refer to the aim of each reaction type, the reagents typically used and a representative example of each chosen type. (i) Han...

Isooctane (2,2,4-trimethylpentane), one of the many hydrocarbons that make up gasoline, burns in air to give water and carbon dioxide. What is the enthalpy change if you burn 8.00 L of isooctan...

. (d) Five-membered unsaturated heterocycles undergo electrophilic substitution reactions rather than the expected addition reactions. Explain with supporting diagrams how this arises and then comme...

. (a) Explain the term tautomerism and show how it arises. For each of the following compounds draw the structure of all the possible tautomers that could arise and then indicate with reasons which ...

Please answer the questions as fast as you can please . Question 1 Consider the following questions: (a) What is the total volume of the CO2(g) and H20(g) at 600"C and 0.888 atm produced by t...

Can you please tell me one acid-base interaction we need daily? What happens with that interaction if it becomes more acidic or more basic?

answer the questions Please if you don't know how to answer them leave the questions for someone else. Thanks you !! . (a) Account fully for each of the following observations by referring to th...

Al reacts with oxygen as follows: 4 Al (s) + 302 (g) -> 2A1203 (s) You wish to calculate the mass of AlOg that can be prepared from 34.0 g of Al and 40.0 g of Oz. a. How many moles of AlyOg can be ...

Aqueous hydrochloric acid HCl will react with solid sodium hydroxide NaOH to produce aqueous sodium chloride NaCl and liquid water H2O. Suppose 1.46 g of hydrochloric acid is mixed with 3.2 g of sodiu...

Fill in the table below. Chemical formula Cation A13+ Mg?+ NHa* anion co,?- 02- PO,3-. Fill in the table below. Chemical formula Cation anion A/3+ CO,2- Me2+ 02- NH4 PO. 3-

Write the electron configurations for Sulfur (S) by using (1) spdf notation, and (2) Condensed electron configuration. (3) How many valance electrons does one Sulfur atom have? (4) How many unpaired e...

answer the questions Please if you don't know how to answer them leave the questions for someone else. Thanks you !! . Q5 (25 marks) (a) A sophisticated IR instrument has a wavelength range of 1...

answer the questions Please if you don't know how to answer them leave the questions for someone else. Thanks you !! . Q3 (25 marks) (a) A grating monochromatic 1550 blazes/mm was irradiated wit...

Fill in the table below. The name needs to be spelled correctly. Name Formula NO; Aluminum oxide CO Iron (III) sulfate. Fill in the table below. The name needs to be spelled correctly. Name Formula NO...

Drop Down Box Options For Both questions. CHEMWORK ? Consider the octahedral complexes of Co3+. Complete the following statements. The strong field complex is v paramagnetic The weak field complex is ...

. HW 9 (optional) [Review Topics] [References] 2. ChemWork - Electron Configuration. . 2 pt (a) Give the formula for tetrachloroferrate(III) ion. M 3. Coordination Compounds: Oxidation..2 pts M O[Fe...

. HW 9 (optional) (Review Topics] [References] Apply - LAGIVING ZU.VET Rank the following complex ions in order of increasing wavelength of light absorbed. 2. ChemWork - Electron Configuration.. 2 p...

1. You are tasked with determining the chemical formula of an iron(III) chloride hydrate. You weigh out 3.476 g of the iron(III) chloride hydrate on a balance. You then heat the sample in a crucible u...

1. You are given a solution containing an unknown ionic compound. You are told that the cation is one of the following four ions: Na+, NH+ 4 , Ca2+, or K+. You are also told that the anion is one of t...

. Use the References to access important values if needed for this question. What is the calculated value of the cell potential at 298 K for an electrochemical cell with the following reaction, when...

7. You are a chemist in a laboratory preparing a 2.0 M hydrochloric acid (HCl) solution from a concentrated (12 M) solution of HCl. How many milliliters of concentrated HCl must you use to prepare 500...

3. (12 points) Calculate the cell potential (E, in volts) for the following cell: Fe (s) + CuZ+ (aq, 1 M) -› Fe2* (aq, 0.1 M) + Cu (s) The forward reaction is spontaneous. Use the following Nernst e...

CH 3 CH3 + en Ph Me Me HO Ph Ph- Ph Ph + en HO ph ph NEC- HO

4. (12 points) Describe how interdigitated microelectrode (IME) works for detecting large-sized biological targets, such as bacteria.

Calculate the pressure of 87.5g C*O_{2} in a 3.2 L container at 29.2 . (R = 0.08206Latm / m * olK)

11. Estimate the percent of the wooden block that is submerged in the water and record this value as a percentage. Note that this is easier if you tip the wood on end and allow it to float.

At 520 K, the Kc value is 0.202 mol.dm-3. the equilibrium amount of CI2 is found to be 0.900 mol. Calculate the amount of PCI5 present in this equilibrium mixture, to an appropriate number of signific...

What effect does temperature have on the Equilibrium constant (K qe )?

What effect does temperature have on the Equilibrium constant (Kqe)?

How much energy as heat is required to raise the temperature of 50.00 mL of water from 25.80 °C to 28.31 °C? (Density of water at this temperature is 0.997 g/mL. The specific heat capacity of liqu...

Need an explanation thank you!. Question 18 10 out of 10 points The chemical bond can be thought of a bound state of a particle in a confined potential. In the figure below, we exemplify such a confin...

1) Determine which anomer of the pentaacetate was formed in the reaction. mp of product = alpha / beta anomer forms.

. Analyze Redox Reactions: Oxidi... 2 pts 2req Use the References to access important values if needed for this question. Preparation Question Question 2Ni2+ + Sb205+ H20->2NiO2 + 2Sbot+ 2H+ Ques...

1. Describe, in details, how one could determine luminescence quantum yield experimentally. 2. What is the relationship between the luminescence quantum yield and different deactivation processes? 3. ...