Chemistry Questions and Answers July 30, 2020

Q. Explain anomalous electronic configuration of copper and chromium Chromium

Indicate, by letter, the strongest acid and the weakest acid of those below. COOH The strongest acid is The weakest acid is COOH COOH,Arrange the following carboxylic acids in order of acidity. CHCOOH a The strongest acid is The second strongest is The third strongest is The weakest acid is CICHCOOH b FCHCOOH C ICHCOOH d,Arrange the following

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 42) Of the acids in the table below, is the strongest acid. Acid HOAC HCHO HCIO HF Ka 1.8 105 Ln ng 3.0 108 6.8 x 104 A) HCHO B) HCIO O HOAc and HCHOI D) HOC E) HP 43) The equilibrium constant for the gas phase reaction 2502 (g) O2 (g) 2503 (g)

Study the electrode potentials for the half cells below and use them to answer the questions that follow. The letters do not represent the actual elements. A(eA() B(a)te. C(a)e D 2e D(s) 2 G2) eG() B(s) C EO (volts) 2.96 0.52 0.00 0.44 1.36 a) Identify the strongest oxidizing agent. Explain. (2 mks),b) Which of the two half cells would produce

b)For Step-1 and Step-2 ans Step-3

2. Study the scheme below and answer the questions that follow. Polymer Q R and Gas K Name Na Step III Compound P Conc HSO Temp 170C Propan101 Step II CHCHCOOH NaCO CHCHCH3 step I Propylethanoate Solution V CO 1

3 a) What is meant by the term enthalpy at formation.,standard state b) The enthalpies of combustion of carbon, hydrogen and ethanol are given below. CoOw CO AH393kJmol HOHO AH286 kJmol (1) If the enthalpy of combustion of ethanol is1369kJmol. Draw the energy cycle diagram that links the enthalpy of formation of ethanol to enthalpies of combustion

4.0.12M aqueous standard nitric (v) acid was titrated against 25cm of aqueous sodium hydroxide solutions in a conical flask. 11.5cm of acid was required to react completely with alkali. a) Name two apparatus that can be used in this experiment other than conical flask. (1 mk),b) Calculate the concentration of sodium hydroxide used in experiment.,

5. The grid below represents port of the periodic table. Study it and answer the questions that follow. The letters do not represent the actual symbols of elements. A F Im B L Q CDEM GHJ a) Identify the most electronegative and electropositive element. Explain. (2 mks),MUCLRGY a b) Element Q reacted with steam at elevated temperatures to produce

Acetylene gas is 92.3% carbon and 7.7% hydrogen (by mass), and its molar mass is 26 g/mol. What is its molecular formula?

A 10cm diameter copper ball is to be heated from 100C to an average temperature of 150C in 30 minutes. Taking the average density and specific heat of copper in this temperature range to be l 8950 kgm and Cp 0.395 kJkg C, respectively, determine (a) the total amount of heat transfer to the copper ball, (b) the average rate of heat transfer to

1.2 kg of liquid water initially at 15C is to be heated to 95C in a teapot equipped with a 1200-W electric heating element inside. The teapot is 0.5 kg and has an average specific heat of 0.7 kJ/kg C. Taking the specific heat of water to be 4.18 kJ/kg C and disregarding any heat loss from the teapot, determine how long it will take for the water

Electric heating element Water 15C 1200 W

A 5mlong section of an air heating system of a house passes through an unheated space in the basement. The cross section of the rectangular duct of the heating system is 20 cm x 25 cm. Hot air enters the duct at 100 kPa and 60C at an average velocity of 5 ms. The temperature of the air in the duct drops to 54C as a result of heat loss to the cool

Concrete roof 8 m (c 15 C 6 m 0.25 m The roof of an electrically heated home is 6 m long, 8 m wide, and 0.25 m thick, and is made of a flat layer of concrete whose thermal conductivity is k 0.8 Wm C. The temperatures of the inner and the outer surfaces of the roof one night are measured to be 15C and 4C, respectively, for a period of 10 hours.

A common way of measuring the thermal conductivity of a material is to sandwich an electric thermofoil heater between two identical samples of the material. The thickness of the resistance heater, including its cover, which is made of thin silicon rubber, is usually less than 0.5 mm. A circulating fluid such as tap water keeps the exposed ends of

A 2mlong, 0.3cmdiameter electrical wire extends across a room at 15C. Heat is generated in the wire as a result of resistance heating, and the surface temperature of the wire is measured to be 152C in steady operation. Also, the voltage drop and electric current through the wire are measured to be 60 V and 1.5 A, respectively. Disregarding any

It is a common experience to feel chilly in winter and warm in summer in our homes even when the thermostat setting is kept the same. This is due to the so called radiation effect resulting from radiation heat exchange between our bodies and the surrounding surfaces of the walls and the ceiling. Consider a person standing in a room maintained at

EXAMPLE 8 Room air 29C Pond 20C com Quod Consider a person standing in a breezy room at 20C. Determine the total rate of heat transfer from this person if the exposed surface area and the average outer surface temperature of the person are 1.6 m and 29C, respectively, and the convection heat transfer coefficient is 6 Wm C

7 300 K L1 cm 17200 K Consider steady heat transfer between two large parallel plates at constant temperatures of T 300 K and T2 200 K that are L 1 cm apart, as shown. Assuming the surfaces to be black (emissivity 1), determine the rate of heat transfer between the plates per unit surface area assuming the gap between the plates is (a)

The fast and efficient cooking of microwave ovens made them one of the essential appliances in modern kitchens. Discuss the heat transfer mechanisms associated with the cooking of a chicken in microwave and conventional ovens, and explain why cooking in a microwave oven is more efficient.

23. 24. 25. 26. Examine the phase diagram for the substance Bogusium (Bo) and select the correct statement. D Temperature A) Bo(s) has a lower density than Bo(). B) The triple point for Bo is at a higher temperature than the melting point for Bo. C) Bo changes from a solid to a liquid as one follows the line from C to D. D) Bo changes from a

Calculate ?H o for the following reaction ussing the given bond dissociation energies CH 4(g) + 2O 2(g) --> CO 2(g) + 2H 2 O (g) BOND ?H o (kJ/mol) O-O 142 H-O 459 C-H 411 C=O 799 O=O 498 C-O 358 ?H o = ? kJ/mol Is the reaction endothermic or exothermic?

1. When dissolved in water, RbOH behaves as _____. a base that forms Rb+ and OH- ions. an acid that forms RbO- and H+ ions. a base that forms RbO- and H+ ions. an acid that forms Rb+ and OH- ions. 2. Which of the compounds H3PO4 , Mg(OH)2, LiOH, and HCl, behaveas bases when they are dissolved in water? H3PO4 and HCl only LiOH only HCl Mg(OH)2 and

2) Given this reaction at equilibrium N2 (g) 3 H2 (g) 2 NH3(g) In which direction toward reactants or toward products does the reaction shift if the equilibrium is stressed by each change 1. H2 is added. 2. NH3 is added. 3. NH3 is removed. 4. Decreasing volume 5. Increasing the pressure of gases

4) For the following reaction HeatCaCO3 (s) CO2 (g) HO (1) Cat2 (aq) 2 HCO3 (aq),What will be the effect of doing each of the following actions on the above equilibrium a) Adding CaCO3 (S) 2 b) Removing Ca (aq) c) Removing CO (g) d) Adding NaHCO3 (s) e) Adding Ne (g) f) Adding CO2 (g) g) Increasing temperature h) Decreasing volume

f) Adding N2 (g),5) for the following reaction 2SO2 (g) O2 (g) 2SO3 (g) Heat What will be the effect of doing each of the following actions on the above equilibrium a) Decreasing temperature b) Increasing O2 (g) c) Decreasing SO2 (g) d) Increasing volume e) Increasing SO3 (g)

Predict the direction of the following shift in the equilibrium when the system is disturbed by a) Raising the temperature b) Adding more nitrogen to the mixture c) Removing some ammonia from the mixture d) Increasing the pressure of gases e) Reducing volume of reaction vessel

8) The following reaction has a Kc value of 10 at 2000C. 2NO (g) N2 (g) O2 (g) If 25 g of NO is placed in a 5L vessel maintained at 2000C, calculate the equilibrium concentrations of the three substances (Relative atomic masses are N 14 amu, 0 16 amu)

9) A mixture of 0.500moles H and 0.500moles 12 was placed in a 2.00L stainless flask at 430C. The equilibrium constant kc for the reaction H(g) 12(g) 2HI(g),Is 54.3 at this temperature. Calculate the concentration of H2, I2 and Hl at equilibrium

10) The decomposition of 0.250moles HI in a 250mL stainless steel flask is studied at 430C. The equilibrium constant Kc for the reaction 2HI(g) H(g) 12(g) Is 1.84 x 10 at this temperature. Calculate the concentration of H2, I2 and HI at equilibrium.

12) The following are some reactions involving gaseous ammonia. N(g) 3H(g) 2NH3(g) NH(g) N(g) H(g) (1) (ii) NH,(9) 23 N(g) 2H(g) 43 NH3(g) a) What is the relationship between i. Ki and Kii ii. Ki and Kiii iii. Kii and Kiii

13) Given the following equations HO (g) CO (g) H2(g) CO2(g) FeO (s) CO (g) Fe (s) CO (g) Kc 4.8 Kc 0.48 Calculate the Kc value for Fe (s) H0 (g) FeO (s) H(g) Kc

14) Given the following equations S (s) O2(g) SO2 (g) 2SO3 (g) 2SO2 (g) O2(g) Kp 48.2 Kp 0.075 Calculate the Kp value for S (s) 3202 (g) SO3 (g) Kp

16) When 0.218 mol sample of hydrogen iodide was heated in a sealed 1 dm flask, the following equilibrium was established at 700K. 2H1 (g) H2(g) 12 (g) The equilibrium was found to contain 0.023 mol of hydrogen. i) ii) Calculate the concentrations of iodine and hydrogen iodide in the equilibrium mixture Calculate the value of equilibrium

17) Which of the following equations has Kc Kp a) PCls (g) PCl3 (g) Cl2 (g) b) 2 NOCI (g) 2 NO (g) Cl (g) c) CaCO3 (s) CaO (s) CO2 (g) d) H0 (g) CO (g) H(g) CO (g) e) 2 NO (g) N2 (g) O2 (g)

Calculate [H+] for each of the followingsolutions. [OH-]=4.8x10^-4M [OH-]=8.3x10^-9M A solution in which [OH?] is 140 times greaterthan [H+].

Calcium reacts with nitric acid according to thereaction: Ca( s )+2HNO3( a q )?Ca(NO3)2( a q )+H2( g ) Identify the oxidizing agent A.) Ca(NO3)2 B.) HNO3( a q ) C.) H2( g ) D.) Ca( s ) I thought that the answer was H 2 but it saidthat H 2 is not the correct answer. I know that theoxidizing agent is the one that is reduced, I choose D becauseH goes

Briefly comment on the effect of a catalyst on each of the following. (a) activation energy A catalyst lowers the activation energy by changing the reaction mechanism. A catalyst lowers the activation energy by changing the rate. A catalyst raises the activation energy by changing the reaction mechanism. A catalyst does not change the activation

Calculate Delta H degree rxn for the reduction of V2O5. The table is : V2O5(s) = -1550.6 DeltaH degree kj/mol : H2(g) = 0 DeltaH degree kj/mol : V(s) = 0 DeltaH degree kj/mol: H2O(g) -241.82 DeltaH degree kj/mol. Express your awnser in 4 significant digits in KJ

sapling learning Answer the questions about the molecule below, which contains one chirality center. Click on the 3D structure to access the rotational controls. What is the highestpriority substituent this chirality center CHCH3 CH3 Br H click to edit What is the lowestpriority substituent at this chirality center CHCH3 CH3 Br H Name the

Calculate the frequency of each of the following wave lengths of electromagnetic radiation. Part A 488.0 nm (wavelength of argon laser) Part B 503 nm (wavelength of maximum solar radiation) Part C 0.0520 nm (a wavelength contained in medical Xrays) Part D Which of the following set of quantum numbers (ordered n, l, ml, ms) are possible for an

Calculate the molar solubility of Ni(OH)2 when buffered atpH=8.0. Express your answer using one significant figure. Calculatethe molar solubility of Ni(OH)2 when buffered at pH = 10.0. Expressyour answer using one significant figure. Calculate the molarsolubility of Ni(OH)2 when buffered at pH = 12.1. Express youranswer using one significant

Calculate the molar solubility of AgI in a 1.0 M NH3 solution.....Idon't understand the part where you calculate Kf, it would be niceto see an in depth solution..thanks you

Arrange these compounds by their expected vapor pressure: H2ONCl3 Br2

Ammonium nitrate decomposes to N2O and water in temperaturesbetween 250C and 300C. Write a balanced chemical reactiondescribing the decomposition of ammonium nitrate, and calculate thestandard heat of reaction using the appropriate enthalpies offormation. Please include phases

a) What is the bond order of F?OF based on the Lewis structureof the molecule? b) What is the bond order of O2 based on theLewis structure of the molecule? c) What is the bond order of CO based on theLewis structure of the molecule? d) Rank the following series of molecules or ions in order ofdecreasing bond energy using their bond order to

Based on the given value of the K sp, what is the molarsolubility of Mg(OH)2 in 0.160 M NaOH? Express your answer with the appropriate units. Calculate how many times more soluble Mg(OH)2 is in pure waterBased on the given value of the Ksp, calculate the ratio ofsolubility of Mg(OH)2 dissolved in pure H2O to Mg(OH)2 dissolved ina 0.160 M NaOH

Analyzing a specific reaction:Consider the following reaction:2Mg + O2 --> 2MgO , Rate = k[Mg][O2]^2Part A What is the overall reaction order? Express your answer as an integer.Part B What are the units of the rate constant k for this reaction?

Two identical firms face linear demand. Market demand is given by P=30-Q. Suppose both firms face zero marginal costs. 1. Solve for Cournot equilibrium prices and outputs. 2. Solve for Stakelberg equilibrium prices and outputs. 3. Compare graphically consumer and producer surplus in Cournot and Stakelberg equilibria to perfect competition.n

1. A student is curious about the K sp value forNaCl. The student looks up the value om the appendix of histextbook but cannot find a value for NaCl. Why not? 2. Draw the structure for the tetraborate ion.

In acidic solution, the bromate ion can be used to react with anumber of metal ions. One such reaction is BrO3?(aq)+Sn2+(aq)?Br?(aq)+Sn4+(aq) Since this reaction takes place in acidicsolution, H2O(l) and H+(aq) will be involved inthe reaction. Places for these species are indicated by the blanksin the following restatement of the equation:

When an atom of an electropositive atom becomes an ion, it a) gains electrons b) becomes larger c) emits an alpha particle d) does none of these What is the answer and why? If the answer is D, then please explain what it would do. Thanks!

What is the amount, in moles, of each of the following substances? 1. 11.4g Ar 2. 3.45g Zn 3. 25.5g Ta 4. .211g Ti

Bromination of an alkene by N-bromosuccinimide (NBS) in thepresence of light or peroxide is a radical reaction and produces anallylic bromide. For the following bromination of3-methylcyclopentene, select the allylic bromides from the set atthe right that would be products of the reaction.

Bromination of an alkene by Nbromosuccinimide (NBS) in the presence of light or peroxide is a radical reaction and produces an allylic bromide. For the following bromination of 3methylcyclopentene, select the allylic bromides from the set at the right that would be products of the reaction. CH3 A B Which structures are products of this reaction

Calculate K at 298 K for the following reaction: SrSO4(s)<--> Sr2+(aq) + SO42-(aq) SCIENTIFIC NOTATION PLEASE...thankyou . Comments : the answer K = 3.48 x 10^-7was wrong,it said HInt:For any state function (G, H, or S) the change in the statefunction, F, for a reaction can be calculated from Delta F rxn=(sideways M)n x delta F (products)

Are the bonds in each of the following substances ionic, nonpolar covalent, or polar covalent? (a) KCl ionic nonpolar covalent polar covalent (b) P4 ionic nonpolar covalent polar covalent (c) BF3 ionic nonpolar covalent polar covalent (d) SO2 ionic nonpolar covalent polar covalent (e) Br2 ionic nonpolar covalent polar covalent (f) NO2 ionic

#5-2 If the boron nitride molecule, BN, were to form, what would itsstructure look like? Add bonds and lone pairs as necessary.

18) For the reaction PCls (g) PCl3 (g) Cl2 (g) If the initial pressure of PCIs is 2 atm and at equilibrium it is 15 dissociated, what is Kp

19) For the reaction 2NO (g) N2 (g) O2 (g),If the initial NO 0.50 M and at equilibrium it is 5 dissociated, what is Kc

20) For the equation NH4l (s) NH3(g) HI (g) The total pressure at equilibrium is 4.2 atm. What is Kp

For the equation (NH4) (H2NCO2) (s) 2 NH3(g) CO2 (g) 21) The total pressure at equilibrium is 0.33 atm. What is Kp

equilibrium. calculate Kc?

22) For the equation N2 (g) O2 (g) 2 NO (g), you start with 2 M of each of the reactants. They react away to an extent of 27 to reach

23) For the equation 2 NOBr (g) 2 NO (g) Br2 (g), you start with 0.75 M of the NOBr. At equilibrium, the NOBr has reacted away by 89. Calculate the value of Kc

26) For the reaction NOCI (g) 2 NO (g) Cl2 (g) Kc 1.2x10 If the initial NOCI 0.15 M, NO, 0.75 M, and Cl 0.05 M, is the system at equilibrium If not, which way will the reaction shift, left or right

27) For the reaction NH3 (aq) HO (1) NH4 (aq) OH (aq) Kc 1.8x105 1 If the initial NH30 0.5 M, NH4 0.0025 M, and OH 0.0025 M, is the system at equilibrium If not, which way will the reaction shift, left or right

28) For the equation CS2 (g) 3Cl2 (g) S2Cl2 (g) CCl4 (g), Kc 4.8x10. If you start with CS2 0.025 M, Cl2 0.175 M, SCl2 0.58 M, and CC14 0.042 M, is the reaction at equilibrium If not, which way will the reaction go to reach equilibrium (left or right)

Calculate the standard enthalpy of formation (H f) for nitroglycerin. The explosive nitroglycerin (C3H5N3O9) decomposes rapidly upon ignition or sudden impact according to the following balanced equation: 4C3H5N3O9( l )12CO2( g )+10H2O( g )+6N2( g )+O2( g ) H rxn=5678kJ

Based on your answer to Part B, what is the average rate of formation of HCl? Now consider the following reaction and data: H 2 +2ICl2HCl+I 2 Time (s) I2 concentration ( M ) 5 1.45 15 1.90 Part B: What is the average rate of formation of I2?( 0.045 M/s )

Calculate the pH of the solution that results fromeach of the following mixtures. Part A 50.0mL of 0.16M HCHO2 with 80.0mL of0.11M NaCHO2 Express your answer using two decimal places. pH = Submit My Answers Give Up Part B 120.0mL of 0.13M NH3 with 260.0mL of0.13M NH4Cl Express your answer using two decimal places.

Calculate the number of oxygen atoms in 29.34 g of sodium sulfate,Na 2 SO 4 . A. 1.244 10 23 O atoms B. 4.976 10 23 O atoms C. 2.409 10 24 O atoms D. 2.915 10 24 O atoms E. 1.166 10 25 O atoms

Assuming each solution to be 0.10 M , rank the following aqueoussolutions in order of decreasing pH. Rank the solutions from thehighest to lowest pH. To rank items as equivalent, overlapthem. N2H4, Ba(OH)2, NaOH, HCI, HOCI Highest PH to Lowest pH

So, basically, I have to figure out the concentration ofacetylsalicylic acid in solution 50 mL sample. But, I'm unsure ofhow to calculate it. I know molarity is moles / L, and I know how to get moles. But,I'm confused on diluting. Initially we placed .325g of acetylsalicylic acid in a flask,and then added 10 mL of 1 M NaOH to let it boil. Then we

Calculate the pH of a 0.021 M NaCN solution. Given Ka(HCN) =4.9x10-10. A. 1.68 B. 3.18 C. 5.49 D. 7.00 E. 10.82 Will rate lifesaver for correct answer.. Please show work, i need to know how to solve this!!!

Based on the mole ratio you determined in Part C, what is the empirical formula of this compound? Carbon: 6.66 Hydrogen: 19.8 Express your answer as a chemical formula. Part C answers are correct but, it will not let me insert a decimal in subscript or super script which is silly. How would I do this

Balance the following equation: Ca 3 (PO 4 ) 2 ( s ) + SiO 2 ( s ) + C( s ) ? CaSiO 3 ( s ) + CO( g ) + P 4 ( s ) A. 2Ca 3 (PO 4 ) 2 ( s ) + 6SiO 2 ( s ) + 10C( s ) ? 6CaSiO 3 ( s ) + 10CO( g ) + P 4 ( s ) B. Ca 3 (PO 4 ) 2 ( s ) + 3SiO 2 ( s ) + 8C( s ) ? 3CaSiO 3 ( s ) + 8CO( g ) + 2P 4 ( s ) C. Ca 3 (PO 4 ) 2 ( s ) + 3SiO 2 ( s ) + 14C( s ) ?

Which atom is matched with the correct formal charge? There is only one answer. O in CO, ?1 N in CN?, ?1 F in NF3, ?1 N in NO2?, ?1 Xe in XeF4, zero

B For which of the following molecules or ions could this be theenergy-level diagram: Check all that apply. Check all that apply.H2 He2 H2+ He2+ H2? Part C What is the bond order of the molecule or ion? What isthe bond order of the molecule or ion? 0 1/2 1 3/2 2 5/2 3

The amount of carbon 14 present after t years is given by theexponential equation A(t)=A0ekt?, with k=? ln2/5600. Using carbon14 dating of charcoal found along with fossilized leaf? fragments,botanists arrived at an age of 48,000 years for a plant. Whatpercent of the original carbon 14 in the charcoal was? present?

Benzene has a heat of vaporization of 30.72 kJ/mol and a normalboiling point of 80.1 degrees celcius. At what temperature doesbenzene boil when the external pressure is 445 torr? A) 397 K B) 79 C C) 63 C D) 372 K

What is the balanced chemical equation for the reaction used tocalculate ?H?f of CaCO3(s)? If fractional coefficients arerequired, enter them as a fraction (i.e. 1/3). Indicate thephysical states using the abbreviation (s), (l), or (g) for solid,liquid, or gas, respectively without indicating allotropes. Use(aq) for aqueous solution. Express your

Based on the Henderson-Hassalbach equation how many mmols of Tris-HCl are there in 100 mL of a 100 mM Tris-HCl buffer solutionat pH 8.1? Please note that the 100 mM refers to the sum of Trisand Tris-HCl concentrations

Which of the following will not affect an economys PPF a. An increase in the retirement age b. A fall in unemployment c. The introduction of improved manufacturing processes. d. The creation of new capital by firms.

a. What is the rate law for the uncatalyzed reaction? a. rm rate={it k}[Ce^{4+}]^2[Tl^+] b. rm rate={it k}[Ce^{4+}][Tl^+] c. rm rate={it k}[Ce^{4+}] d. rm rate={it k}[Ce^{4+}][Tl^+]^2 e. rm rate={it k}[Ce^{4+}]^2[Tl^+]^2 f. rm rate={it k}[Tl^+] Part B If the uncatalyzed reaction occurs in a single

9. Modern pennies are composed of zinc coated with copper. Astudent determines the mass of a penny to be 2.485 g and then makesseveral scratches in the copper coating (to expose the underlyingzinc). The student puts the scratched penny in hydrochloric acid,where the following reaction occurs between the zinc and the HCl(the copper remains

Answer the following questions about the characteristics of the elements in Group 2 (the alkaline earths). 1. How do they react with iron? a. A salt is formed (Ml2) b. A salt is formed (Ml) c. no reaction 2. How do they react with water? a. Hydrogen gas is released b. oxygen is released 3. How do they react with oxygen? a. an oxide is formed (M2O)

in aqueous solution, classify these compounds as strong acids, weak acids, strong bases, weak bases other. H3PO4, HF, LiOH, Ba(OH)2, (CH3)3N, NH3, CH3, COOH, NaCl, HNO3, HCl, CsOH, H2CO3, H2SO4,HCN, Ca(OH)2, Hi, NO3, HCN, H2CO3

9. Which of the following solutions has the greatestbuffering capacity? [A] 0.243 M HFand 0.192 M NaF [B] 0.485 M HFand 0.383 M NaF [C] 0.970 M HFand 0.766 M NaF [D] 0.160 M HFand 0.126 M NaF [E] They are all buffersolutions and would all have the same capacity. 10. The Henderson-Hasselbalch equation is________ [A] pH = pK a +log [ acid ]/[ base ]

AFor the given reactions, classify the reactants as the reducing agent, oxidizing agent, or neither. 1 H 2Mg, Drag the appropriate items to their respective bins. F2 02 Mg H2 OXIDIZING AGENT REDUCING AGENT,BHere is a more complex redox reaction involving the permanganate ion in acidic solution 8H MnO4 5Fe Mn 4HO,Classify each reactant as the

A 30.0-ml sample of 0.165 M propanoic acid is titrated with 0.300 M KOH. 1. Calculate the at 0 of added base 2. Calculate the at 5 of added base. 3. Calculate the at 10 of added base. 4. Calculate the at the equivalence point. 5. Calculate the at one-half of the equivalence point. 6. Calculate the at 20 of added base. 7. Calculate the at 25 of

234/90Th undergoes beta decay. What is the atomic number of theresulting element? Express your answer numerically as an integer. Z = ?

1. Write a balanced equation for the reaction of NaCH3COO and HCl. Express your answer as a chemical equation. Identify all of the phases in your answer. Enter no reaction if no precipitate is formed. 2. Identify the precipitate (if any) that forms when KOH and Cu(NO3)2 are mixed. Express your answer as a chemical formula. Enter no reaction if no

Calculate the molality of a solution containing 14.3 g of NaClin 42.2 g of water. (MW= 58.4 g/mol) 5.80 m 2.45* 10 -4 m 5.80 * 10 -4 m 2.45* 10 -1 m

Balance the following equation: K2CrO4+Na2SO3+HCl?KCl+Na2SO4+CrCl3+H2O Generally coefficients of 1 are omitted from balanced chemicalequations. When entering your answer, include coefficients of 1 asrequired for grading purposes. Enter the coefficients for each compound, separated by commas,in the order in which they appear in the equation(e.g.,

Calculate the destiny of CO 2 gas at STP based on yourexperiment. Compare this density with that of air at STP (1.29g/L)Briefly comment on the probable validity of the assumption that theair in the flask is displaced by the CO 2 gas.

29) For the equation PCI5 (g) PCl3 (g) Cl2 (g), You start with 0.25 atm of each of the products as well as the reactants. The Kp value is 0.125. Is the reaction at equilibrium Prove it. What are the equilibrium pressures of all species

30) For the equation H0 (g) CO (g) CO2 (g) H2 (g) Kc 0.235 If 2 moles of each of H2O and CO are put into a 10 L container, what is the concentration of all species at equilibrium

31) For the equation SO2Cl2 (g) SO2 (g) Cl2 (g) Kp 4.8 If enough SOCl2 is put into a container so its pressure is 8 atm, what is the equilibrium pressure of all species. What is the total pressure

32) For the equation CaCO3 (s) CaO (s) CO2 (g) Kp 2.4 If 200 g CaCO3 is put into a 20L container at 500 K, how many grams of it remain at equilibrium

33) For the equation 2 KCIO3 (s) 2 KCl (s) 3 02 (g), you start with some KCIO3 that decomposes into the products. At equilibrium, there is some solid remaining and the total pressure in the flask is 0.29 atm. Calculate the value of Kp.

34) For the equation COBr2 (g) CO (g) Br2 (g), you start with 4 moles in a 10 L vessel of COBr2. The reaction has a Kc 0.76. What are the equilibrium concentrations of all species

35) For the equation H2 (g) CO2 (g) HO (g) CO (g), you start with 2 atm of each of the reactants and none of the products. The Kp 3.4. What are the equilibrium pressures of all species