Chemistry Questions and Answers May 23, 2020

Cyclobutylbromomethane reacts with methanol and heated to produce cyclopentene, this reaction runs via ________ carbocation intermediates. Pro-primary, b) Secondary, c) Tertiary, d) Pro-secondary, e) none of the above. 19. Which compound produces only one alkene when treated with sodium methoxide. a) 2-chloro-2-methylpentane, b)

Draw the major product and propose a reasonable mechanism, showing all intermediates and electron movement (arrow pushing), for the reaction of 3hexyne with HOH3O. (ii) Draw and name two possible enol tautomers that can form from the product obtained in (1).

Show Calculations for surface tension of both liquids G hrdG A. RADIUS OF THE CAPILLARY Expt 1 (isopropanol) Expt 2 (detergent) 9,39. 4.50 cm Total height of water in the capillary (a) 859 cm cm Height of water in beaker (b) 3.26 cm Height (h ab) cm cm Radius of Capillary (r) cm cm Show Calculations for radius of both capillaries r 2g hdG B.

(a) What are bonding and anti-bonding orbitals? Please show with theory and diagrams. (b) In case of bulk silicon, how can we predict the size and shape of orbitals theoretically? Please explain with detailed quantum mechanical discussions and equations. [N.B.: Quantum mechanics: Hydrogen atom chapter may help to answer this part]

Assume that you had a choice of two reagents to react with the following starting material, CH3OH and the CH3O ion. Which nucleophile would be more likely to give a racemized product?

CH3 Br H

Predict the product of the following elimination reaction. Elimination reactions can often give two different products, depending on which carbon atom adjacent to the CX bond is attacked. As a rule, the dominant product of the reactions is the most highly substituted alkene. Predict the product of the following elimination reaction. Assume that

(CH3)CO Br

1. Write the equilibrium expression for the following equationsl) Ni(aq) Co(aq) NiCo(aq) II) Ni (aq) 2Co(aq) (NiCo,)(s) III) Ni(s) Co(aq) Ni (aq) Co(s) IV) Ni(aq) 2Co(aq) Ni(s) Co(aq) 4

2. Temperature can have a significant effect on the value of the equilibrium constant. For example, the dissociation of Ca(OH), has a Ksp of 6.5 x 10 at 20 C and a Ksp of 5.5 x 10 at 25 C. Is the dissociation of Ca(OH), an exothermic or endothermic process Fully explain your answer.

19. Write the balanced equation for the following reactions i. Substitution reaction between methane and chlorine ii. Esterification reaction between ethanoic acid and ethanol iii. Addition reaction between propene and hydrogen chloride iv. Elimination reaction between 2-bromobutane and methoxi(CH3O) 20. What product(s) would you expect from

(a) CH3CH2CH2CH2B. NaN3 CH3CH2CH2CH2NNN Ether (b) CI CH3CH2CHCH2CH3 CH3CH2CHCHCH3 Ethanol (c) OCCH3 CI CH3 CH3CO2H CH3

Assume a computer that has 32-bit integers. Show how each of the following values would be stored sequentially in memory, starting at address 0x100, assuming that each address holds 1 byte. Be sure to extend each value to the appropriate number of bits. You will need to add more rows (addresses) to store all given values. a) 0xAB123456 b) 0x2BF876

Byte Order Address Big Endian Little Endian Ox100 Ox101 Ox102 Ox103 Ox104 Ox105 Ox106 Ox107

Q1. Complete and write the mechanism for any two of the following. i) Cl2 AlCl3

The initial pH of a water sample is 7.5. A 200 ml sample is titrated with 0.01 N H 2 SO 4 . The pH 4.5 endpoint is reached after the addition of 15 ml of the acid. Determine the species of alkalinity present and the concentration (in mg/L as CaCO 3 ) of each.

In setting up your 3 kinetics experiment, you will be mixing different volumes of the two reactants (oxalic acid (H2C2O4) and potassium permanganate (KMnO4)). If you mix 10 ml of 0.02 M with 20 ml of 0.5 M oxalic acid, what is the concentration of KMnO4 in the mixture? Hint: Use M1?V1 = M2 ?V2.

A mixture of 3.66 mol of N2 and 40.55 g of NO is heated in a closed vessel to 2000 C After heating, the total pressure of the mixture at equilibrium is 3.14 atm

N,(g) 0,(g) 2 NO(g) Kp 0.101 at 2000C In which direction does the reaction proceed after heating to 2000 C The reaction proceeds toward the products. The reaction proceeds toward the reactants. The reaction is at equilibrium. Calculate the equilibrium partial pressures of N,, 0,, and NO at 2000 C. PN, atm Po, atm V Scroll PNO atm

Compound Cr(acac), Cu(acac), Fe(acac), Mn(acac), 16 K.Cr(C.O.),3H,O 16 HO 13 Cr Cu Fe Mn 13 12.8 Species Diamagnetic correction ( x 10gatom) acac 55 C.0, 30 13 13 Mwt Temperature R, R gmol (C) 19 16 16 Calculate wt empty wt with sample (g) 35.998 0.7991 0.9025 35 258 0.7998 0.9147 35 23500.8207 0.9063 1) d system 2) 3) Xm 4) Xdia 35 10400.7989

If 100 mol methanol and 100 mol acetic acid are fed to a batch reactor and allowed to come to equilibrium. How many moles of each component will be present in the product stream?

Magnetic Susceptibility acac complex n order to cause a reaction to occur according to the tri-molecular mechanism, it is necessary that after the iodine molecule breaks down into the iodine atoms, a reaction takes place (22 (and not a reaction) A. Use a website to locate data on the reaction rate constant (22 (at different temperatures). In the

(22) (3) H 2122HI ks k6 HIH 1 H

The graph below shows an overlay of the van Deemter plots for three HPLC columns with different stationary phase packing particle sizes. With reference to the van Deepter equation, explain the shape of the plots, why the shapes of the plots are different, and also explain what useful information can be gained by studying van Deemter curves. 30 25

An atmospheric chemist, studying the pollutant sulfur trioxide (SO3), places a mixture of sulfur dioxide (SO2) and oxygen (O2) in a rigid 3.05 L container at 631 K and 1.65 atm. When the reaction occurs, gaseous sulfur trioxide is formed according to the balanced equation below and the pressure falls to 1.35 atm. SO2 02 SO3 Assuming that the

What is the product of sodium 2-chlorobenzoate + H2O added to HCl?

Consider the kinetic scheme for freeradical polymerization. Demonstrate that when polymer chains terminate at sites located on the surface of the polymerization vessel kwall RM P and this is the only mode of termination, then the overall rate of polymer ization is given by V, kpol MI where kpol 2 kp kal kwall

5, Reactiom Pragues ,1. The energy diagram of the following reaction is shown below (CH3)3CBr CH3COO (CH3)3COCOCH3 Br A. Identify the reaction mechanism as indicated 1. 2. 3. 4. 5. B. What specific type of reaction is represented by the given reaction C. What is the order of the reaction as indicated by its kinetics (please see picture below) 1.

we are talking about halide salts of Element X. The halide and element X is in a 1:1 ratio. Given the ionic radius of element X is 181 pm In the previous part of the question I calculated the ionic radius of the halide to be 161.93 pm Question: In terms of Element X, assign chemical formulae to XRD patterns A to D.

What is chemistry

You wish to design an effusion source for Br atoms from Br2 (g). Br2 (g) 2Br (g) (a) If the source is to operate at a total pressure of 0.0132 bar at 1000 K, what is the value of the equilibrium constant if the degree of dissociation is 0.35 ,(b) What pressure is required to increase the degree of dissociation to 0.75 at same temperature Is this

The formation of tetramminecopper(II) ion, is a reversible reaction having formation constant . The minimum concentration of free ammonia in solution required to ensure that at least 99% of the dissolved copper(II) ion is found in the form of its ammonia complex is . What is value of p? [Given: ]

(1) Describe, in detail, the discovery and mechanism of action of sulphonamide drugs. (ii) Describe, in detail, the discovery and mechanism of action of penicillins. (ii) (iv) Draw the molecular structure of clavulanic acid and describe its mode of action. Draw the chemical structure of orlistat and identify the mechanism of action of this drug.

The equilibrium constant, K p , equals 3.40 for the isomerization reaction: cis- 2-butene trans- 2-butene. If a flask initially contains 0.250 atm of cis- 2-butene and 0.165 atm of trans- 2-butene, what is the equilibrium pressure of each gas? P( cis- 2-butene) = 0.0735 atm and P( trans- 2-butene) = 0.250 atm P( cis- 2-butene) = 0.0458 atm and P(

1. If you added 5 mL of a 20X tocopherol to 5 mL of cell culture at a density of 2.4 x 107 cellsmL, what would the final concentration of tocepherol and cell density be

The RandomRange procedure from the Irvine32 library generates a pseudorandom integer between 0 and N - 1. Your task is to create an improved version that generates an integer between M and N - 1. Let the caller pass M in EBX and N in EAX. If we call the procedure BetterRandomRange , the following code is a sample test: mov ebx, -300 ; lower bound

3. The overall rate of radical polymerization is measured as the decrease in monomer concentration over time (dMdt). If it is assumed that initiator radicals are equally as reactive as polymer radicals, the reactions below can be produced showing the dissociation, propagation, and termination steps involved in radical polymerization. a. Using the

9.44. Hydrogen is produced in the steam reforming of propane C3H8(g) 3H2O(v) 3CO(g) 7H2(g) The watergas shift reaction also takes place in the reactor, leading to the formation of additional hydrogen CO(g) H2O(v) CO2(g) H2(g) The reaction is carried out over a nickel catalyst in the tubes of a shellandtube reactor. The feed to the reactor

Consider a system of distinguishable particles having only three energy levels separated by an energy which is equal to the value of KT at 30.0 K. The second energy level is doubly degenerate and the third is triply degenerate. (a) Calculate the molecular partition function at 300.0 K. 25 marks (b) Calculate the electronic contribution to the

Indicate products for the following reactions.

1. mCPBA 2. H3O PdC, H2(g) HCI 1)03 2)DMS Br2 1)BH3. THF 2)H2O2 NaOH H30

(a) Write the electronic configuration of the complex (Fe(NH3)63 on the basis of Ligand Field theory and draw the MO diagram. (b) Predict whether a reaction will occur when Br is added to aqueous solution of each of the following complex ions. Explain. i. (FeF ii. Pt(NH3)31 (b) Using the criterion of number of product particles, predict which of

Directions Using the curve below describe what is happening between each of the points C B D F Time (min) i. AB ii. BC iii. CD iv. DE V. EF Temperature (C)

Directions Use the cooling curve below to answer the following questions. 130 110 IV 70 50 II 30 10 10 20 30 40 50 60 10 30 Heat Added (k) Photo credit httpssites.gocgle.comsiteheatingandcoolingcurvesfrsrc1299042706797curveexplanationHEATING20CURVE.png 1. In which region(s) does temperature remain constant 2. In which region(s) does temperature

Complete the sentences given below. v include(s) product recalls, warranty costs, and legal fees. involves analyzing the functionality of a product to determine which functions add value to the customer and then finding ways to deliver those functions while meeting the target cost 1. 2. Value Engineering 3. Activities such as expediting an order

Directions Read and analyze the following questions and compute for what is unknown in the given problem. Show complete solution by stating the given and unknown, and show the process from writing the formula to unit conversion (if applicable). 1. Suppose you added 4.0 moles of sugar to 10.0 L of solution. Calculate the molar concentration of the

Directions Read and analyze the following questions and compute for what is unknown in the given problem. Choose the correct numerical value from the response list on the right. Responses on the right may be used more than once or need not be used at all. B. 58.44g 1. What is the percent by volume concentration of a A. 1.43mL solution in which

A solution is prepared at 20C and its concentration is expressed in two different units Molarity and Molality. The solution is then heated to 88C. Which of the concentration units will change

1) One ream of paper is defined as 500 sheets of paper.e a) Is this an exact or inexact relationship Explain. b) If this is an inexact relationship, how many significant figures are shown in this relationshipe c) Fill in the blank with the correct value. e 1 ream of paper . sheets of papere d) In the space below, write the 2 conversion fractions

According to the Equipartition of Energy principle, the average kinetic energy of each degree of freedom in a system is considered as equal once the system has reached thermal equilibrium. Describe and show how this principle breaks down, particularly at low temperatures. Using the expression provided below for vibrational energy, show that the

For the reaction thO16) Z thO vep), at latu and 298K, f enthalpy chonge 43932 Juol entropy chonge 118 J uol.k and D specific heat 41.24 209 x 10 xT Then calceulate and explain Cat latu and OC) a) enthalpy b) extropy O free enthalpy chonge d) eatropy of the wivese (change ) e) entropy of the systen Cchange)

What is the sum of all the coefficients when the following redox reaction is balanced? NO2- (aq) + MnO4- (aq) NO3- (aq) + Mn + 2 (aq) (Acidic Medium)

Compare a new venture to an existing company and explain why existing companies can obtain bank funding and new ventures cannot In replies to peers, review the criteria needed for financing and discuss how those needs differ based upon the business selected?

Use the engineering step process economic analysis to solve the problem described below. Problem Description: You're in a room with three light switches, each of which controls one of three light bulbs in the next room. Your task is to determine which switch controls which bulb. All lights are initially off, and you can't see into one room from

An atom exchange reaction A + BC = AB + C is exoergic by 115 kcal mol-1 in the gas phase but is found to involve an activation energy barrier of 10 kcal mol-1. Furthermore, calculations of the relevant potential energy surfaces for the reaction show that it is "entrance channel" controlled. With the aid of a labelled diagram, explain what is meant

1) One ream of paper is defined as 500 sheets of paper. a) Is this an exact or inexact relationship Explain.e b) If this is an inexact relationship, how many significant figures are shown in this relationshipe c) Fill in the blank with the correct value. e 1 ream of paper sheets of papere d) In the space below, write the 2 conversion fractions

Please name these following compounds

NO2

A rubber stopper of 65.4 g is immersed into a graduated cylinder filled with 30.0 ml of unknown liquid. the level rises to 48.8 ml. if the density of the liquid is 0.785 g/ml what is the mass of the unknown liquid?

For parts of the free-response question that require calculations, clearly show the method used and the steps involved in arriving at your answers. You must show your work to receive credit for your answer. Examples and equations may be included in your answers where appropriate. HCl(aq)+NaOH(aq)NaCl(aq)+H2O(l) A student was given the task of

? ? ?

1. The powder Xray diffraction patterns for 4 of the halide salts of Element X are shown below, and their first 5 peaks given in tables. Note that all patterns were obtained using Cu Ka radiation of wavelength 1.54056 , and the halide and element X are in a 11 ratio. Pattern A 20 20.717 29.389 36.357 42.009 47.351 52.081 60.984 Intensity 556

For the following reaction, 33.8 grams of iron are allowed to react with 19.3 grams of oxygen gas. Iron (s) oxygen (g) Iron(III) oxide () What is the maximum amount of tron(III) oxide that can be formed grams What is the FORMULA for the limiting reagent What amount of the excess recagent remains after the reaction is complete grams

Derive the integrated rate law of the second order following reaction A 2B P

The standard deviation of the analyzes made for the determination of vitamin C by classical method in parsley was found to be 0.98 g / kg. The standard deviation of the analyzes made with the newly developed method was found to be 0.76 g / kg. Has the new method contributed to the reproducibility of the classical method? (Fcritical = 2.54% 95

The most important characteristics NaoH Preparation mechanism, and the most important compound interaction? !!! The most important interactions NaoH And a preparation mechanism, write 10 interactions ?!

When 0.1 M persulfate ions (2 charge) reacts with 0.1 M iodide ions (1 charge), if the rate constant of this reaction at room temperature and 0.1 M ionic strength was 3x 10 5 Lmol.s. The rate constant at zero ionic strength is 1.3 x 10 4 1x 10 5 7 x 10 6 3 x 10 5

When 0.1 M persulfate ions (2 charge) reacts with 0.1 M iodide ions (1 charge), if the rate constant of this reaction at room temperature and 0.1 M ionic strength was 3x 10 5 Lmol.s. The rate constant at zero ionic strength is 1.3 x 10 4 1x 10 5 7 x 10 6 3 x 10 5

So, apparently the dilution was in order, .25- 8x, the .5- 4x, the third sample 2x and the ,last sample sample no dilution? Also supposedly the vol. BSA was all 2 and i don't understand as to why nor the volume of the water. I am confused as to where to start and look for first because i keep on getting decimals that even when converted do not

Sample 0.25 g BSA 0.5 g BSA 1 g BSA 5 g BSA Dilution, if any vol. BSA vol. HO vol. 5X sample buffer 4 . 4 . 4 . 4 . final vol. 20 . 20 . 20 . 20 . Lane on gel,Sample 0.25 g BSA 0.5 g BSA 1 g BSA 5 g BSA Dilution, if any vol. BSA vol. HO vol. 5X sample buffer 4 . 4 . 4 . 4 . final vol. 20 . 20 . 20 . 20 . Lane on gel

Based on the advantages and disadvantages of each of the following forms of businesses, give an example of a business that would be best suited to that particular form. Be sure to explain why that is the best option for the particular business. (1) Sole proprietorship (2) Limited partnership (3) Corporation (4) Limited Liability Company

A solution of ammonia and water contains 1.50x1025 water molecules and 7.00x1024 ammonia molecules. How many total hydrogen atoms are in this solution Enter your answer numerically. View Available Hint(s) Vo AEO H atoms

2. provide a mechanism for tle following sequence Etz0 Me HQ OH z) AICI3

How to prepare 1 liter of a buffer mixture of pH 9.5 starting from HCl and 10 mmol of Na2CO3 What will the pH value be after adding to 100 ml of the buffer mixture a) 5.102 mmol of NaOH b) 5.102 mmol of HCl 5.102 mmol of NaOH means 5x105 moles of NaOH pka of HCO3CO32 10,30

The syntheses of aziridine, azetidine and pyrrolidine are shown in Figure 4. a. Reaction 1 H2N. Br Aziridine NH Reaction 2 Br Azetidine Reaction 3 H,N. Br Pyrrolidine Figure 4 (1) Classify the above reactions according to Baldwin rules and explain the nomenclature you use. (ii) Identify which reactions are favoured or disfavoured and explain your

Balance every chemical reaction and identify the type of reaction that occurred 1. N2 H2 NH) 2. KCIO KCI 10, 3. NaCI F NaF Cl2 4. H H0 5. Pb(OH) HCI HO PbCl2 KSO4 O 6. AIBR KBr Al(SO4)s 7. CH4 CO HO 8. FeCls NaOH Fe(OH)3 NaCI 9. P POs 10. CHs HO CO 11. Ag0 Ag 0 12. Na HO NaOH H 13. Ss SO 14. CO CoH12O, H0 HO 15. CSHis

Synthesize this compound from benzene. Show reaction.

A spill of a specialised petroleum product consisting of equal amounts of n-butane, n-hexane, n-oxtadecane, and benzene has occurred in a marine area subject to moderate wave action. Evaluate the following: a. Possible toxic effects in the marine system b. The possible composition of the product after 1 month in the marine area

A student has 4.60 g of zinc powder, 1.35 L of a 3.20 M calcium nitrate solution, and 1.70 L of a 3.30 M lead(II) nitrate solution. Using the activity series, which of these two solutions will react with the zinc powder calcium nitrate lead(II) nitrate Write the chemical reaction that occurs between the two reacting species. Include physical

A series of dopamine analogs was synthesized and assayed for their effect on the dopaminergic D2 receptor. The results are summarized in the following table receptor activity when 100 mM dopamine added Compound Ka (nM) receptor activity Dopamine 1.9 19.0 18.4 1 180 12.1 6.2 37 0.1 0.8 3 0.46 19 19 4 14.9 12.2 18.4 a) Compare the affinities of

27.2.3 The complement system a. consists of 20 blood proteins. b. is triggered by bacterial cell walls. c. coats invading bacteria with proteins. d. All of the above.

During rain storming 2000 m water droplets falling down through 3000 m of ambient air from the top to the ground. In ambient air it containing 5 m of particles with a density of 60 g/cm3. Estimate the collection of particles. Assume Vt = 22 ft/s.

The enzyme catalyzes the below reaction MAX -> MATT The kcat of the enzyme is 400 sec(-1). When [Et]= 10 nM and [MATT]=40M, the reaction velocity is 7.2 M s(-1). Calculate Km for substrate MAX.

A student needs to prepare 1 litre of isotonic solution for experiments on red blood cells. The initial solution provided had a concentration of 75 mosmoleL. How much additional mosmoles of entities will be required to make the solution isotonic O a. 216 O b. 250 O . 260 O d. 238 O e. 233 Next pag

(17 pts) We have successfully produced a new protein (MW40,000) in soluble form using cellfree protein synthesis (CFPS). We would now like to develop a purification scheme for this protein. Propose and describe a twostep chromatography process to recover the protein from the CFPS solution. Briefly explain your selections and the relevant

Write the differential rate law for the reaction between iodide and hydrogen peroxide. For most purposes, if a small percentage of the reactants are used (less than 10), the concentration change may be ignored when comparing the initial rate to the average rate. Show, by calculation, that for the present experiments, the number of moles of

What is the volume (in mLmL) of 0.147 MKNO3MKNO3 that must be added to 166.8 mLmL of 0.260 MK2SO4MK2SO4 to produce a solution having [K+][K+] = 0.450 MM? Express the volume with the appropriate units.

Calculate the AOM (Angular overlap model) ligand field matrix for the generic system consisting of a metal bound to 2 ligands, which are identical and linearly ligating with the AOM parameters e ?og e?. The ligands have the polar coordinates (?,?) = (0,0) and (180,0), respectively. Give the matrix in the usual basis of real d-orbitals. Diagonalize

0

Which of the following statements does not properly state a basic principle for reporting an accounting change? A. retrospectively apply a change in accounting principle B. prospectively account for a change in accounting estimate C. retrospectively adjust for a change in reporting entity D. retrospectively apply a change in accounting estimate

Tell what would be the reported value (compared to the supposed true value) given the following situations. Choices are higher, lower or no effect. Explain your answer. No attachment but encode your answers. Note Conditioning means rinsing the glassware with the solution to be filled. 1. ascorbic acid Sample solution in the flask was not covered

Listed below are several of the Fundamental and Enhancing Qualitative Characteristics. Required Match the characteristic that goes with following statement the omission or misstatement of information could influence the users economic decisions taken on the basis of the financial statements. B A understandability fundamental qualities C D

07. Categorise these alkyl halides as primary secondarytertiary, and drcie the most electrophile (6) location within the molecule. Br OR. Predict the major product of these reactions and draw the mechanism for reactions A and D. A) MECN . Acetic acid OH Acetone Nalir

Now please please

Problem 1 MGS You have a solution of sodium hydroxide and magnesium ulphate and a precipitate is formed. a Write the ions there is in the mixed solution b Which compound is formed as the precipitate Which ions is spectator ions d Write two balanced equations one for the ions that precipitate and one that include both compounds ecitations Problem

4 2 HKE) H2 (g) g) In the above reaction. 3 moles of HI (g) are placed in a constant volume vessel under 12 atmospheric pressure. When equilibrum is reached at constant temperature. what will be the partial pressure of HI (g) If mol fraction of H2 is 167 4 atm. b) 1 atm. 6 atm d) 8 atm. 3 atm Bos birak

The precipitation of Ba3(PO4)2 occurs when 0.15 g of Na3PO4.12H20 are mixed with 0.15 g Bacl2.2H20 in 200 ml water, What will be the expected mass of Ba3(PO4)2 Na3PO4.12H20 (380 gmol), BaCl2.2H20 (244gmol), Ba3(PO4)2 (MM 602 gmol) (2 Points) 2NasPO4.12H20() 3BaClz.2H20tag) Baz (PO)2i) 6NaCI 30H20n O 0.119 g O 0.123 g O 0.079 g O 0.200 g

According to valence bond theory, which orbitals overlap in the formation of the bond in HCl? 1s on H and 3p on Cl 1s on H and 4s on Cl 1s on H and 2p on Cl 2s on H and 3p on Cl 2s on H and 2p on Cl

17. How likely is it to observe a bond angle of 20 or of 50 between the first three carbon atoms of 1 mole fatty acid from question 16 at room temperature Hint consider the equilibrium bond angle and the respective distorted bond angle as two thermodynamic states and calculate the ratio of both states at 298K. ,16. A bond angle between the first

A 3.65 grams sample of magnesium is heated in the air to give magnesium oxide, if at the end of the experiment 5.96 grams of the product magnesium oxide were formed, what is the percent by mass of oxygen in the product O a. 39.70 Ob. 38.76 O c. 50.00 O d. 61.24

Density is a characteristic property of a substance. This means that the density of water O a. Is greater for a greater mass of water O b. Is less for a smaller mass of water O c. Stays the same regardless of the volume d. Changes depending on the volume

Suppose you are provided with a 36.50 g sample of potassium chlorate (KCIO3). What percent of oxygen by mass should theoretically be released upon heating (molar mass of KCIO 1226 and Oz 32.0 gmol) O a 39.15 O b. 35.35 O c. 60.85 O d. 50.00

Unwanted substance might form when heating magnesium in the air to give magnesium oxide, to remove this unwanted substance we added few drops of water to convert it to O a. Mg(OH)2 O b. MgO2 O . Mgo O d. Mg02

The empirical formula that results from reacting 5.63 grams of phosphorus (P) with 7.25 grams of oxygen would be (given the molar mass of P 30.97, and O 16 gmole) O a. P20 O b. PO2 O. PO25 O d. P205

The ratio of the actual yield to the theoretical yield is known as the O a. Reagent yield O b. Percent yield O CExperimental yield O d. Excess yield