Chemistry Questions and Answers July 14, 2020

rt B Au(OH)3, gold(III) hydroxide, used in gold plating Express your answer to two decimal places and include the appropriate units. Submit My Answers Give Up

An equilibrium constant greater than 1 for a reaction indicates that the reaction favors formation of the products. True False

The element francium (Fr) was the last element of the periodic table discovered in nature. Because of its high radioactivity, it is estimated that no more than 30g of francium can exist at any given time throughout the Earths crust. Assuming a molar mass of 223 g/mol of francium, what is the approximate number of francium atoms in the Earths crust.

Examine the curved arrow below, and answer the question in the box. If the curved arrow creates a reasonable structure, draw the structure it creates. Show all lone pairs and nonzero formal charges. If the curved arrow does not create a reasonable structure leave the drawing space blank. Do the curved arrows create a reasonable structure apal H O

Now exam the reaction between iron(III) chloride and sodium hydroxide. Use 60 g NaOH and add FeCl3. What mass in grams of FeCl3 must be added to just consume 60 g NaOH ?

SIMULATION Limiting Reactants Unbalanced Equations O AgNO NaC1lAgCl NaNO, O Ca(NO) Na,CO,CaCO,NaNO, O Pb(NO) KCrOPbCrOKNO, FeCl, NaOHFe(OH), NaCl O FeCl NajSFeS NaCl Initial Mass of NaOH Oog O 20 g 40 g O 60 g Add FeCl Add 1 g Add 10 g Total Mass of FeCl, added 0 g Reset Experiment Recheck 3rd attempt Now examine the reaction between

Background The Periodic Table is arranged according to Periodic Law. ThePeriodic Law states that when elements are arranged in order ofincreasing atomic number, their physical and chemical propertiesshow a periodic pattern. These patterns can be discovered byexamining the changes in properties of elements on the PeriodicTable. The properties that

Do balanced chemical equations imply which of the following? a.Numbers of molecules are conserved in a chemical change. b. Numbers of atoms are conserved in a chemical change. c. Volume is conserved in a chemical change. d. A and B

If you bake a pizza at 450 degrees Fahrenheit, what are the Celsius and kelvin equivalents of this temperature? Show the work.

A bag of Hershey kisses contains the following information: Serving size: 6 pieces = 31g Calories per serving: 350 Total fat per serving: 12g Note: 1 lb = 16oz 1 oz = 28.35 g a.) The bag contains 2.0 lbs of hersheys kisses. How manykisses are in the bag? b.) The density of a Hersheys kiss is 1.5 g/ml. what is thevolume of a single hersheys kiss in

Which equation most accurately represents synthesisreaction between lithium and oxygen? a) Li(s) + O2(g) ? LiO2(s) b) 2 LiO(s) ? 2Li(s) + O2(g) c) Li(s) + O2(g) ? 2 Li3O(s) d) Li(s) + O2(g) ? 2 Li2O (s) Which of the following equation represents aprecipitation reaction? a) BaCO3(s) ? BaO + CO2 b) CaO(s) + SiO2(s) ? CaSiO3 c) LiBr(aq) + AgNO3(aq) ?

em Set Chapter 6 Moles and Mass 1. How many moles of K ions are in 1.75 mol of K2SO4 2. How many calcium atoms are in 16.2 g of calcium 3. What is the mass in grams of 2.68x1022 atoms of uranium

F An element has two isotopes. One isotope has a mass of 63.3 g. The other isotope has a mass of 67.79 g. If the average weight of the atomic mass is 65.37, what is the of the larger isotope Report your answer to two decimal places.

The electron configuration for a chlorine atom is: 1s2 2s2 2p63s2 3p5. What electron configuration represents the electrons thatmake up only the core electrons for a chlorine atom? A. 1s2 2s2 2p6 3s2 B. 1s2 2s2 2p6 3s2 3p5 C. 1s2 D. 1s2 2s2 2p6

Electrical charge is sometimes measured using a unit called theCoulomb. A single proton has an electrical charge of +1.6 x 10-19Coulombs. A single electron has an electrical charge of -1.6 x10-19 Coulombs. You have an atom with a total electrical charge of+4.8 x 10-19 Coulombs. The atom has 10 electrons. What type of atomis it? Explain BRIEFLY.

What is the atomic mass of an element? The atomic mass of an element is really the average mass of the element calculated by accounting for the mass of each isotope and how commonly the isotope is found in nature. The atomic mass of an element is really the average mass of the element calculated by adding the masses of all isotopes and then

Draw a Lewis structure for SO2 in which all atoms obey the octetrule. Show formal charges. Do not consider ringed structures. Draw a Lewis structure for SO2 in which all atoms have a formalcharge of zero. Explicitly showing the zero charges is optional. Donot consider ringed structures.

Draw the Lewis structure for the iodine dioxide difluoride ion, IO2F2-. Which statements are correct regarding its Lewis structure? (Note, all the atoms are bonded to the central I atom.)Steric NumberOctet Rule Exceptions Choose at least one answer. a. There are 34 valence electrons. b. There are 35 valence electrons. c. There are 36 valence

Draw every stereoisomer for 1,2-difluoro-1,2-dimethylcyclopentane. Use wedge-and-dash bonds for the substituent groups, and be sure that they are drawn on the outside of the ring, adjacent to each other. The skeletal structure of one molecule is included to indicate the proper format; modify the X's on the given structure to create the first

X X x X

Discuss the utility and applicability of Hesss Law inthe laboratory environment. Here are some suggestions of topics on which to elaborate uponin your explanations: An explanation of the similarities and differences of head (q)and heat of reaction (H rxn ). The definition of a thermochemical equation with an includedexample. A definition of

Assign formal charges to the atoms in these three structures (only necessary for atoms with nonzero formal charge). Do not add or delete bonds or electrons. Assume that all unshared valence electrons are shown but overall charges are not. Add formal charges to CH. Select Draw 3 Rings More C H H CH 44 H Select Draw Rings More Add formal charges

D 4 20 F3 184.0000 Question 7 The discovery of atomic structure in the early 1900s was discussed in Chapter 2 of your textbook. One atomic model proposed during this period was the plum pudding model. Which statement best describes this model Most of the atom is empty space with an electron moving in a region outside of the nucleus. All three of

Discover how atomic mass is calculated. 1. We saw previously that the average atomic mass of boron is 10.81 amu. In the simulation, select boron. Next, click My Mix to create your own mixture of boron isotopes. Begin by adding a single Boron10 isotope to the mix. How many Boron11 isotopes must you add to bring the average atomic mass up to the

Thank you in advance 1.Ashless filter paper forms only volatile compounds upon combustion or burning in air. In other words, no liquids or solids are formed, only gases. If ashless filter paper is cellulose and has the simplest formula C6H10O5, write a balanced chemical equation for the combustion of ashless filter paper.

The dilution factor is the number by which you must multiply the original concentration to find the concentration of the diluted solution. The dilution factor is calculated as below. dilution factor concentration of diluted concentration of original The dilution factor is also equal to the ratio of the volumes of the original and diluted

What is the difference between covalent bonds and ionic bonds There are no differences between covalent bonds and ionic bonds Covalent bonds involve the sharing of electrons between atoms ionic bonds involve the sharing of protons between charged atoms. Covalent bonds involve the sharing of pairs of electrons between atoms ionic bonds involve the

can anyone tell me how to read the sds page gel results ?

SDSPAGE gel

Question The anode is where oxidation takes place. In a galvanic cell, the anode is negative. What is the charge of the anode in an electrolytic cell Is it negative or positive The cathode is where reduction takes place. In a galvanic cell, the cathode is positive. What is the charge of the cathode in an electrolytic cell What component of an

The active site of chymotrypsin is made up of Choose one Asp 102 and His57 from the A chain and Ser 195 from the C chain. Asp 102 and Ser 195 from the B chain and His57 from the C chain. Asp 102 and His57 from the A chain and Ser 195 from the B chain. O Asp 102 and His57 from the B chain and Ser 195 from the C chain.

Diethyl ether is a flammable liquid. The vapor pressure ofdiethyl ether is 657 mmHg at 32C. Calculate vapor pressure of thiscompound at 18C. ?Hvap for diethyl ether is 26.0 kj/mol,R=8.314 J/K mol. What will be its normal boiling pointin C?

The diameter of a ping pong ball is 4.0 cm . Find the length in kilometers of a row of 6.02 times 10^{23} ping pong balls.

Analyze the H NMR spectrum and its peaks to answer the following question: Could this spectrum belong to 4-Benzyloxyanisole? Include data for chemical shift, integration, and splitting.

10.0 9.5 9.0 8.5 8.0 7.26 Chloroformd 2.19 Loos 7.0 6.5 6.0 5.5 5.03 Fo 4.5 4.0 3.78 S0E 3.5 3.0 2.5 2.0 1.57 1602 1.0 220 200 180 160 140 0.5 0.0 120 100 80 60 40 20 0 20

Determining the Amount of Energy in Food (REPORT) Date Name partner(s) Experimental Data Volume of water added (mL) Mass of water (g) Initial water temperature C Final water temperature C AT Initial mass of holder and Cheeto (g) Final mass (g) Mass of Cheeto burned (g) Trial 1 20 20 20.8 82.5 61.062 60.248 Trial 2 20 20 19.2 61.3 60.764 60.206

1. Compare and contrast the terms primary standard and secondary standard. pure, stable, high molemmber weight no hydration, no water. Primary standard Secondary standard prepared in the lab for a specific analysis. 2. Calculate the mass of oxalic acid dihydrate (C,H,O, 2H,O) needed to prepare 500.0 mL. of 0.2500 M oxalic acid solution. 0.2500

If you add 1mL of 2M NaOH to 100mL of 10mM acetic acid, whatwould be the resulting fraction of acetate in the resultingsolution? a) 100% b) 90% c) 50% d) 10% e) 0%

9.36 The BohlmannRahntz pyridine synthesis cyclizes an openchain intermediate under acidic conditions, to form an aromatic ring. Propose a reasonable mechanism for the ringclosing and aromatization steps. HO NH OH ss HO HO

The actual formula for hydrated copper chloride is CuCl 2 .2H 2 O. Your sample: 0.0116 mol H 2 0 0.0058 mol Cu 0.01511 mol Cl

5. The actual formula for hydrated copper chloride is CuCl2HO. a. Based on this formula, how many grams of water were present in your sample of hydrated copper chloride b. Calculate the percent error of your measured mass of water compared to the theoretical mass of water in the sample. C. Error lexperimentaltheoretical theoretical x 100

Determine the chemical formula of arsenic pentachloride.What is the molar mass (in g/mole) of this compound? Type only the number rounded tothe nearest hundredth.

can all carbohydrates be digested by humans? explain your answer

Quest Question 3 Which of the following is the correct IUPAC name of the following structure OA. Chlorocyclopentane OB. 2Chloro1methylcyclopentane OC. 1Methyl2chlorocyclopentane OD. 1Chloro2methylcyclopentane

I Define a bio coagulant Illustrate how does kaolin causes turbid and not clean water What makes kaolin used to prepare a turbid water

Convert kilocalories to joules. Select the correct units and conversion factors for each step in the following unit roadmap. kcal 4.184 J 1 cal 1 cal 4.184 J 1 kcal 4.184 kJ 10 cal 1 kcal cal 1 kcal 10 cal 4.184 kJ 1 kcal mol,A 0.0635mol sample of a nutrient substance, with a formula weight of 114 gmol, is burned in a bomb calorimeter containing

The decomposition of XYXY is second orderin XYXY and has a rate constant of7.1610 ?3 M?1?s?1M?1?s?1 at a certaintemperature. a) What is the half-life for this reaction at an initialconcentration of 0.100 MM? b) How long will it take for the concentration of XYXY todecrease to 12.5%% of its initial concentration when theinitial concentration is

Can u please help me

1. 2. ResultsObservations Observation of fluorescent light rainbow spectrum. List the colors you observed, in order from left to right, in the spectrum. Gas Discharge Tubes List the colors of the lines you observed in each spectrum, from left to right, as well as any other observations of the spectrum. Hydrogen Water vapor Date Other element(s)

1. Summarize The principal quantum number, n, can have the values of The angular momentum quantum number, I, can have integer values from The magnetic quantum number, m, can have integer values from to 2. When n 3,1 can have values of For the 3d sublevel, I has a value of When n 4, I can have values of For the 4p sublevel, I has a value of When

8. What would be the effect of decreasing the column temperature on the plate height of a column in Gas Chromatography (a) It would result in a decrease in plate height, if the Bu term dominates. (b) It would result in an increase in plate height, if the su and u terms dominate. (c) The plate height would remain the same. (d) Both (a) and (b) are

nilrntakeAssigni se student home 020 References Indicate, by letter(s), the position(s) on the ring at which substitution occurs when the aromatic compounds shown undergo bromination with Br2, FeBr3 (when necessary). pt pt 1 pt 1 pt 010 cwru zoom COH C 0C C b OH cwru canvas b NO C

1.73. The widths of copper lines in printed circuit boards must be close to a design value. Three manufacturers were asked to prepare circuit boards with copper lines that are 0.500 m (micrometers) wide (1 m 1 x 106 m). Each manufacturers quality control department reported the following line widths on five sample circuit boards (given in

7. How many atoms are present in 10 grams of Sodium (Na) (2.0 points) (Avogadros number is 6.022 X 102) 8. How many grams of nitrogen molecules (N2) are present in in 3X 1022 number of N2 molecules (2.0 points) (Avogadros number is 6.022 X 10) and MolecularFormula weight of N28 vableDisabe vehicle Tag 1 Eats

60. If the temperature outside is 78 degrees Fahrenheit, what is that temperature in Celsius C (F32) x 59 F (C x 95)32 48 degrees C 25.6 degrees C O28.8 degrees C 21.1 degrees C

Draw the structure

C3H8O 4.0 3.5 4 PPPM 3.0 2.5 2.0 1.5 1.0 0.5 PPK

6. Your roleplaying game party of high fantasy warriors arrives at a blacksmith to get new weapons forged. The blacksmith forges a longsword with 1.74 kg of iron at 1371 C, which was cooled down in 8.5 L of water initially at 40 C. What is the final temperature of the iron longsword when it reaches thermodynamic equilibrium The specific heat

6. Which reagent will accomplish this transformation H (C) (A) H, PdBaSO, quinoline (B) NaBH. (C) LAIH (DI Na, NH, 57. What is the product of this reaction sequence (A) CHCCCH G (D) CHCC AICI, NaH Br CC H CH, ZnHg) Br H HO EN (B) 58. Which reaction sequence would accomplish this transformation (D) CHICHI 131 LOCH,CH, O (B) FeBr My CH CHCH HO E1D

58. The half-life of ibuprofen (also known as Advil) is 2hours. Imagine that you took 500 milligrams of ibuprofen because ofback pain. Now imagine that your back pain will return when theamount of ibuprofen in your body is less than 100 milligrams.Assuming that the ibuprofen relieves pain immediately afteringestion, when will you begin to feel

5. Fill out the following table, using wobble whenever possible. DNA sense or template DNA sense or template mRNA tRNA protein 5, 3 amino or carboxyl in T U A T C r a U A U U A C 5, 3 amino or carboxyl 3,First letter U G U UUCJ Phe UUA Leu UUG GUU GUC GUA GUG CUU CCU CUC CCC CUA CCA CUG CCG Leu Second letter A UCU UCC UCA UCG AUU ACU AUC lle

5. Consider the phase diagram for iodine and answer each question. a. What is the normal boiling point for iodine? b. What is the melting point for iodine at 1 atm? c. What state is present at room temperature and normal atmospheric pressure? d. What state is present at 186 o C and 1.0 atm?

Pressure (not to scale) Pc 1 atm 113.6 C 184.4 C Tc Temperature (not to scale)

Compare the two following alternatives in terms of future worth using MARR 8 Alternative 1 First cost 42,000 Yearly cost 6,000 Salvage value 6,000 Lifetime 5 Alternative 2 First cost 79,000 Yearly cost 3,000 Salvage value 12,000 Lifetime 10 a. Alt 1 224,490, Alt 2 202,015 b. Alt 1 718,368, Alt 2 535,339 c. Alt 1 426,531, Alt 2 616,145 d. Alt 1

When copper (II) ions are dissolved in water, they forma hexaaquacopper (II) ion, Cu(H2O)6+2. Write the equilibriumrepresenting the formation of this ion when copper (II) is mixedwith water. When NH3 is added to the Cu(H2O)6+2, a new complex ionis formed, Cu(NH3)6+2. Write the equilibrium representing theformation of this complex ion. When nickel

Convert the following measurement. 5.1 10 9 mol 2 g.cm mol 2 kg. m

Convert a density measurement of 0.17 gmL. to kilograms per cubic meter. Show the conversion with dimensional analysis by dragging components into the slots. 834 E )( 0.17 g I mL Im 1000 kg 1 kg Answer Bank 1m 1 ml. 1g. 100 cm 10 cm 1000 g 1 cm kgm

Convert the following as indicated 19. 4500 mL 20. 500 mg 21. 0.04 L 22. 800 mL 23. 2 kg 24. 2.5 g 25. 40.5 cm 26. 3 mg 27. 1.2 g 28. 1.5 L mg L g mL L g mm mcg mg ml

Convert 836 Torr to atmospheres. 836 Torr=atm Convert 24.5 atm to torr.24.5 atm Torr Convert 836 mmHg to atmospheres. 836 mmHg=atm Convert 760 Torr to millimeters of mercury. 760 Torr= B) C D) An airplane cabin is pressurized to 580 mmHg . Calculate the cabin pressure in kilopascals (kPa) . 580 mmHg= E) A scuba diver that ascends to the surface

If a patient s blood pressure is 135 over 75 mmHg, what is it in atmospheres (atm) blood pressure 0.0987 Incorrect atm over 0.178 Incorrect atm,Arrange the pressure measurements from the highest pressure to the 1520 mmHg Highest pressure Lowest pressure Answer Bank 0.47 atm 3.5 atm

How to convert 400 ppm of Co2 to atm, in order to find PH ?

A 427 inch V8 was a common engine in the Ford Mustang andChevrolet Corvette. How many liters is that? 1 inch = 2.54 cm Please show work and have clear handwriting

Convert 0.60 m to inches, retaining the correct number of significant figures. This is a twostep calculation involving the conversion factor 1 in 2.54 cm. 24 in 23.6 in 0.24 in 1.5 in Thats not correct

4. What is the frequency of 490.6 nm light 5. What is the wavelength of light (in meters) corresponding to the transition between the 1 and 5 levels in a hydrogen atom.

Consider the structures of the two statins drawn below and match each to its proper descriptor(s). Answer choices may be matched once, more than once, or not at all. HO COO Na OH H CH3 age CH3 1 F HO a. Can be administered at any time of day b. Optimal stereochemistry at C5 is S c. Patients should be warned not to drink grapefruit juice d. No

The connection between the number of microstates, W , andthe entropy, S , of a system is expressed by theBoltzmann equation S = k ln W where k is the Boltzmann constant permolecule (particle), 1.3810?23 J/(K?particle). From thisequation the entropy change, ? S , for a system can berelated to the change in the number of microstates as ? S = k ln W

Why is the conjugate base of OH - -->O 2- . I thought when we find the conjugate base of something we subtract hydrogen from it essentially which I would have thought, would leave me with O - or something to that nature.

The concentration of total sugars in Sprite is due to the highfructose corn syrup. This is HFCS 55, or 55% fructose and 42%glucose. (Please provide explaination with the specified units).(Concentration of total sugars in Sprite = 107.042 mg/mL - thisnumber came from the label which stated 38g/355 mL) a. How many grams of the sugar in the can is

The concentration of sodium iodide used is 15% inacetone. Calculate the number of moles of sodium acetate used ineach test tube. Assume the density of acetone = density of thesolution. (Look up the density of acetone). Show yourwork. Density of Acetone= 0.788 g/ml Molar mass of acetone= 58.08 2ml 15% NaI in acetone (0.788g / ml) * ( 1 mol /

The concentration of caffeine in 5-Hour Energy Extra Strength is0.0208 M. How many milliliters would you have to drink to match the 400.0mg daily limit recommended by the FDA? The molar mass of caffeine is 194.2 g/mol.

The cost principle states that if no cash is involved in a transaction the cash-equivalent value must be used. True False

(30) 2a) Consider 1ethyl2methylcyclopentane. (10) a) Draw, the structure of 1ethyl2methyleyclopentane creating specific stereogenic, sites (i.e. use wedgedash at each site). Label each site as R or S. (5) b) Draw the ENANTIOMER of your original molecule. (5) c) Draw ONE DIASTEREOMER of your original molecule. I (10) d) Draw, ONE CONSTITUTIONAL

2.1 cm x 34.0 cm x 118 cm 1. Write the two conversion factors that exist between the two given units. a. milliliters and liters b. microseconds and seconds c. kilometers and meters 2. Write the two conversion factors that exist between the two given units. a. kilograms and grams. b. milliseconds and seconds c. centimeters and meters 3. Perform the

4. Consider the acidcatalyzed hydrolysis of cellobiose (building block of cellulose) in aqueous solution H OH H OH OH I H H OH H OH HO OH H OH H2O (1)

diels-alder reaction: i do not understand why my answer is incorrect? please help

Part A Complete the mechanism of the following DielsAlder reaction by drawing the curved arrows for the concerted reaction and the final product formed. (Note that the COOH group is a carboxylic acid group, which is electron withdrawing.) Interactive 3D display mode

Complete the following for the compound sodium sulfite. formula NaSO3 atom number in formula sodium sulfur oxygen

3. At 20 C, the density of pure methanol is 0.7914 g/cm3 .Calculate the weight in pounds (lb) of 1 gallon of methanol at 20C. Recall that 1 gal = 231.00 in3.

Compare the solubility of copper(II) sulfide in each of the following aqueous solutions 0.10 M Cu(CH3COO) 0.10 M NaS 0.10 M NH4CH3COO 0.10 M NaNO3 Clear All More soluble than in pure water. Similar solubility as in pure water. Less soluble than in pure water.,Compare the solubility of silver sulfate in each of the following aqueous solutions 0.10

Click in the answer box to activate the palette. Write the balanced chemical equation where liquid octane burns in oxygen gas to form carbon dioxide gas and water vapor. Use the smallest whole number coefficients. Indicate the states of the reactants and products.

3. Show how one might accomplish the conversion of pmethylbenzaldehyde to each of the following compounds. J CH3 CH3 CH3 OH CHCH OH CH 4. In the 3C NMR of benzil, which carbon is responsible for the resonance at 194.5 ppm The other peaks are at 134.8, 132.9, 129.8 and 128.9 ppm. Which carbon(s) are responsible for the resonances at 134.8 and 132.9

A combustion reaction of a hydrocarbon is defined as thereaction of the compound into carbon dioxide and water. CmHn(g) + (m+(1/4)n)O2(g) ---> mCO2 + (1/2)nH2O(l) 1. Demonstrate that this chemical reaction is balanced. 2a. From this definition, write down the chemical reaction forthe combustion of cyclopropane, C3H6(g). 2b. The enthalpy of

Solid HS is added to 280 ml of a 0.450M CaCl solution until no more CaS is formed (see reaction below). At the end of the experiment 5.50 g of CaS is formed. What is the percent yield for the reaction Molar Masses Ca (40.08), S (32.07), CI (35.45) CaCl (aq) HS(s) 2HCl(aq) Cas(s) A Question 5 A system loses internal energy to the surroundings.

3. The distance for a marathon race is 26.2 miles. What is this distance in kilometers 1 mile 1.6093 kms 4. Express the following in Standard scientific notation. 0.0000025 218000000 0.0000871 602221408570000000000000 (Avogadros number) 5. An 18gallon gas tank of a Flex Fuel vehicle (FFV) uses gasohol that contains 17.0 liters of ethyl alcohol.

3) Construct a phase diagram for O2 given the following information: normal boiling point: 90.18K normal melting point: 54.8K triple point 54.34K and 2 torr From your diagram, roughly estimate the vapor pressure of liquid oxygen at -196? C, the lowest temperature easily reached in a lab. Using your diagram, is the density of liquid O2 greater or

Use the twopoint version of the ClausiusClapeyron equation. The vapor pressure of liquid bismuth is 400. mm Hg at 1.72x10 K. Assuming that AHvap for Bi (149 kJmol) does not change significantly with temperature, calculate the vapor pressure of liquid Bi at 1.7510 K. mm Hg

27. Ten ice cubes at 0 C with a total mass of 475 g are placed in a microwave for 7 min, causing them to absorb 290 kJ of energy. Does the ice melt If so, what would the final temperature of the water be A. B. C. D. E. C, (s)2.11 Jg C C. (1)4.19 Jg C C. (g) 2.00 Jg C AH6.01 kJmol AH40.7 kJmol No, the water does not completely melt. Yes, the ice

(a) Explain, using your own example, why two political parties converge to the policy position of the median voter when competing with one another for votes in an electoral contest decided by majority rule. (b) Explain why a second-price (Vickrey) auction guarantees that bidders reveal their true valuation of an item.

Chemistry 2 Chapter 9 Worksheet Key 1. Determine the oxidation number for the atoms of each element in the following formulas. a. Pa b. PF, C. PHI d. PO e. HPO P P P H H Ni N F H O P f. HPO 8. NISO h. NO i. Mn(PO)2 Mn 2. For each of the following equations, write the oxidation number for each atom above its symbol in the equation, and indicate

What is the charge on each of the following complex ions? hexaaquamanganese(II), [Mn(H2O)6]? tris(carbonato)nickelate(III), [Ni(CO3)3]? amminepentachloroplatinate(IV), [Pt(NH3)Cl5]? Express the charges numerically, in the order that the complexesare listed, separated by commas. For a nonzero charge, be sure toinclude the sign (e.g., +1,-2,+3).

Choose the chief hazard that corresponds to the following compounds or reagents (hazards may repeat) FeCl3 solution HOAg (NH3)2 b corrosive irritant flammable explosive corrosive

ab Chlorine gas reacts with solid sodium to produce solid sodium chloride. Write a balanced chemical equation for this reaction. 0 esc I Dont Know 1 FI Q 2 Submit FZ 2 12.001 20 3 F3 6 000 000 F4 SA 4 2018 McGr 4 TR W FR fo 5 T A 6 7 X

Questions 18 refer to the sugar shown in the Fischer Projection below HO HO c) H H H CHOH 1. Classify this carbohydrate as (a) aldose or ketose (b) tetrose or pentose etc. (c) D or L and (d) is Carbon 2 R or S. (b) (d) 2. There are (a) how many stereo centers and (b) how many stereo isomers a) (b) 3. Write the product of reaction of the sugar with

What is the chemical formula for all monomers ofcarbohydrates? 15.What elements (atoms) are proteins made of? Unlike Carbohydrates and Lipids, Proteins contain which element?_________________________ What types of food can you find proteins in? What is the monomer of a protein?_________________________________________________ What is a chain of

What is the charge of the iron ion released upon dissolvingFe(NH 4 ) 2 (SO 4 ) 2 ?Remember the charges of the polyatomic ions NH 4 andSO 4 and that the entire compound will be chargeneutral. a). 8+ b). 2+ c).6+ d). 4+

Can you help me with this problem, please?

CHALLENGE QUESTION MATCHING Determine the correct type of enzyme that will catalyze the reactions described in the following statements. An enzyme that uses water to form fatty acids and glycerol from a triglyceride. An enzyme that converts an aldehyde to a ketone keeping the same chemical formula but different attachment of atoms.. An enzyme that

15g of sugar dissolved in 150ml of water would be a__% solution,which is equivalent to__g/ml.

Partial Question 3 15 g of sugar dissolved in 150 ml of water would be a 10 equivalent to Answer 1 10 Answer 2 10 10 gml. 12 pts solution, which is

2. Give the empirical, molecular and structural formulae for hydrogen peroxide. Hint these are given in your textbook (use the index). (1.5 marks) 3. Give the molecular formula and the structural formula for acetic acid (also in your textbook). (1 mark) Continued on next page,B6 EXPERIMENT B STOICHIOMETRY AND REACTIONS IN AQUEOUS SOLUTIONS PRELAB

2. Fill in the following table so that all tubes have a final volume of 60 l (5 points) Assay Tube Desired BSA (mgml) Volume of 1 mgml BSA (l) Volume of phosphate buffer (l) 60 0 1 blank 2 3 4 5 6 0.2 0.4 0.6 0.8 1.0 0

2. The element sulphur has atomic number 16. Sulphur forms a molecular compound with chloride with a molecular formula SCI. The atomic number of chlorine is 17. i. Write down the electronic configuration of a sulphur atom and a chlorine atom. ii. Draw a Lewis structure of an SCl molecule, by showing the electrons in the outer shells of the atoms.