Chemistry concepts and calculations

What is the ground-state electronconfiguration of a neutral atom of cobalt? Ente

What is the ground-state electronconfiguration of a neutral atom of cobalt? Enter the electron configuration(e.g., [Ne]3s^23p^1). Part B Enter the electron configuration(e.g., 1s^…

What is the half-life for this reaction at an initial concentration of 0.100 M?

What is the half-life for this reaction at an initial concentration of 0.100 M? The decomposition of XY is second order in XY and has a rate constant of 7.12*10-3M-1 at a certain …

What is the half-life of a first-order reaction with a rate constant of 9.00 Tim

What is the half-life of a first-order reaction with a rate constant of 9.00 Times 10^-4 s^-1? Express your answer with the appropriate units. What is the rate constant of a first…

What is the half-life of a first-order reaction with arate constant of 4.00*10 -

What is the half-life of a first-order reaction with arate constant of 4.00*10-4 s-1? What is the rate constant of a first-order reaction that takes9.8 mins for the reactant conce…

What is the heat capacity of the bomb? a 12 6-g sample of acetylene, C_2H_2, pro

What is the heat capacity of the bomb? a 12 6-g sample of acetylene, C_2H_2, produced a tempera-ture increase of 16.9degreeC in the same calorimeter. What is the j energy of combu…

What is the heat of combustion ( H ° rxn ) for acetylene (C 2 H 2 ) , assuming t

What is the heat of combustion ( H ° rxn ) for acetylene (C 2 H 2 ) , assuming that the combustion products are CO 2 ( g ) and H 2 O( g ). Hint make sure to balance the equation. …

What is the heat of combustion of ethane, Cats in kilojoules per mole of ethane?

What is the heat of combustion of ethane, Cats in kilojoules per mole of ethane? Enthalpy of formasion values can be found here. Number kJ/mol ethane For a particular isomer of Cs…

What is the heat of fusion of chromium (in kJ/mol) if 10.0 of solid chromium abs

What is the heat of fusion of chromium (in kJ/mol) if 10.0 of solid chromium absorb 2.82 times 10 J of heat in melting at 2173 K, its melting point? 1.34 6.86 48.5 14.7 34.3 For w…

What is the heat of reaction (heat of neutralization)? kj/mol Mass of calorimete

What is the heat of reaction (heat of neutralization)? kj/mol Mass of calorimeter: 8.322 g Mass of calorimeter plus inital NaOH: 58.72g Final mass of calorimeter: 108.3g Initial t…

What is the heat of reaction (heat of neutralization)? kj/mol Mass of calorimete

What is the heat of reaction (heat of neutralization)? kj/mol Mass of calorimeter: 8.322 g Mass of calorimeter plus inital NaOH: 58.72g Final mass of calorimeter: 108.3g Initial t…

What is the heat of reaction released or absorbed in trial 2? These are my lab r

What is the heat of reaction released or absorbed in trial 2? These are my lab results for trial 2: . I discarded that container and took a new one off the shelf. The mass was 18.…

What is the heat produced in the above combustion? It may be necessary to find t

What is the heat produced in the above combustion? It may be necessary to find the appropriate reference material in the text. If 50, mL of 0.20 M HCl(aq) are mixed with 50, mL of…

What is the hybridization about the COOH carbon atom (colored blue)? Choose one

What is the hybridization about the COOH carbon atom (colored blue)? Choose one answer. a. sp b. sp2 c. sp3 d. sp3d e. sp3d2 The molecular orbital diagram CO in the course notes t…

What is the hybridization at each carbon atom in the molecule? Write hybridizati

What is the hybridization at each carbon atom in the molecule? Write hybridizations starting on the left in molecule. http://session.masteringchemistry.com/render?expr=rraycolsep…

What is the hybridization at each carbon atom in the molecule? Write hybridizati

What is the hybridization at each carbon atom in the molecule? Write hybridizations starting on the left in molecule. http://session.masteringchemistry.com/render?expr=rraycolsep…

What is the hybridization of the atom labeled x? What is the best estimate of th

What is the hybridization of the atom labeled x? What is the best estimate of the magnitude of the bond angle labeled Y? What are the correct partial charges of the atoms labeled …

What is the hybridization of the atoms from left to right? sp^2, sp, sp^2 sp^3 s

What is the hybridization of the atoms from left to right? sp^2, sp, sp^2 sp^3 sp^2 sp^2 sp, sp, sp^2, sp^2, sp^3, sp^2, sp, sp^2, sp^2, sp^2, sp^3, sp^2, sp^2 sp^3, sp^2, sp^3, s…

What is the hybridization of the nitrogen atom in methylamine, CH_3NH_2? What is

What is the hybridization of the nitrogen atom in methylamine, CH_3NH_2? What is the geometry at the nitrogen atom? Draw a structure that clearly shows this geometry Arrange follo…

What is the hybridization state and molecular geometry around sulfur atom in SOC

What is the hybridization state and molecular geometry around sulfur atom in SOCI_2? sp^2, tetrahedral sp^2, trigonal planar sp^3, tetrahedral sp^3, trigonal pyramidal sp^2, trigo…

What is the hydronium-ion of a 0.130 M oxalic acid, H_2 C_2 O_2 solution? For ox

What is the hydronium-ion of a 0.130 M oxalic acid, H_2 C_2 O_2 solution? For oxalic acid, K_et = 5.6 times 10^-2 and K = 5.1 times 10^-2 A) 6.2 times 10^-2 M B) 2.5 times 10^-3 M…

What is the hydroxide concentration, [OH-], in a 3.85 M NaC2H3O2 solution? Consi

What is the hydroxide concentration, [OH-], in a 3.85 M NaC2H3O2 solution? Consider the following information to help you answer this question: Sodium acetate is a water-soluble s…

What is the hydroxide ion concentration of a lye solution that has a pH of 9.20?

What is the hydroxide ion concentration of a lye solution that has a pH of 9.20? What is the hydroxide ion concentration of a lye solution that has a pH of 9.20? 6.31 × 10-10 M Wh…

What is the hydroxide ion concentration of a solution with a pH of 4? a. 10^10 b

What is the hydroxide ion concentration of a solution with a pH of 4? a. 10^10 b. 10^-8 c. 10^-6 d. 10^-4 e. 10^-2 Which of the following would be the strongest acid? a. HXO b. HX…

What is the hydroxide ion concentration, [OH^-], in an aqueous solution where th

What is the hydroxide ion concentration, [OH^-], in an aqueous solution where the hydronium ion concentration, [H_3O^+], equals 4.82 times 10^-8 M: [H_3O^+] = 4.82 times 10^-8 M? …

What is the identify of substance X if 0.380 mol of X weighs 17.5 g? A) NO_2 B)

What is the identify of substance X if 0.380 mol of X weighs 17.5 g? A) NO_2 B) NO_3 C) N_2O D) N_2O_4 How many grams of calcium chloride are needed to produce 10.0 g of potassium…

What is the identify of substance X if 0.380 mol of X weight 17.5 g? NO_2 NO_3 N

What is the identify of substance X if 0.380 mol of X weight 17.5 g? NO_2 NO_3 N_2O N_2O_4 How many grams of calcium chloride are needed to produce 10.0 g of potassium chloride? 0…

What is the identity of the piece of wood? The specific gravity of a patient\'s

What is the identity of the piece of wood? The specific gravity of a patient's urine sample was measured to be 1.008. Given that the density of water is 1.000 g/mL at 4 degree C, …

What is the identity of the two species in each set (strong acid/strong base/wea

What is the identity of the two species in each set (strong acid/strong base/weak acid/weak base/salt/other) and explain your reasoning. Identify if there is anything in common be…

What is the importance of methylation in the activity of restriction endonucleas

What is the importance of methylation in the activity of restriction endonucleases? restriction enzyme recognizes a unique sequence of bases and hydrolyzes the phosphodiester bond…

What is the importance of the citric acid cycle? Why might we say it lies \"at t

What is the importance of the citric acid cycle? Why might we say it lies "at the heart" of catabolism? As always, chose the single best answer. Read all answers carefully before …

What is the indication that the conversion of alcohol to halide is taking place?

What is the indication that the conversion of alcohol to halide is taking place? Why does this occur? Once the reaction is completed, sodium bicarbonate is added to the reaction m…

What is the initial concentration of [I-] and [S 2 O 8 2- ] for run #1? (Run #1

What is the initial concentration of [I-] and [S2O82-] for run #1? (Run #1 includes all of the given solution with the given volumes) Solution Water 0.20 M Potassium iodide 0.25 m…

What is the initial pH of the solution, before any titrant is added? Info: Piper

What is the initial pH of the solution, before any titrant is added? Info: Piperazine,HN(C4H8)NH , a diprotic weak base has the following properties: pKb1 = 4.22, pKb2= 8.67 For w…

What is the initial rate of reaction (in mol-L^-1s^-1) depicted by this graph? 0

What is the initial rate of reaction (in mol-L^-1s^-1) depicted by this graph? 002 0.01 0.008 0.005 Which function of [X]. plotted against time, will give a straight line for a se…

What is the ionic charge for the cobalt ion in CO2(SO3)3? 2+ 1+ zero 3- none of

What is the ionic charge for the cobalt ion in CO2(SO3)3? 2+ 1+ zero 3- none of the above Which of the following anions is isoelectronic with krypton? chloride ion phosphide ion s…

What is the kinetic energy and velocity of the quantum particle 1.0% in mass tha

What is the kinetic energy and velocity of the quantum particle 1.0% in mass that moves in a ID box of 1.0m in length if its quantum number n is equal to 3.0 times 10^33 ? How acc…

What is the kinetic energy of an hour hand? Solution to this problem needs to ad

What is the kinetic energy of an hour hand? Solution to this problem needs to address the following: Consider both a wristwatch and Big Ben (the clock on the tower at the Palace o…

What is the l quantum number for a 4d orbital. A) 0 B) 1 C) 2 D) 3 E) more than

What is the l quantum number for a 4d orbital. A) 0 B) 1 C) 2 D) 3 E) more than one of the above Which orbital is represented in the following picture: A) d_x2-y2 B) d_z2 C) d_xz …

What is the leaving group in the following reaction? CH_3CH_2OH + HCl rightarrow

What is the leaving group in the following reaction? CH_3CH_2OH + HCl rightarrow CH_3CH_2Cl + H_2O OH^- H_2O CH_3CH_2^+ Cl^- Considering the S_N1, S_N2, E1, and E2 mechanisms, the…

What is the leveling effect? All acids are 100% ionized in solvents other than w

What is the leveling effect? All acids are 100% ionized in solvents other than water. An acid with a higher concentration in water has a lower pH than an acid with a lower concent…

What is the limiting reactant of camphor to isoborneol and percent yield? Mass o

What is the limiting reactant of camphor to isoborneol and percent yield? Mass of camphor: 0.072g Molar Mass of camphor: 152.23 g/mol Molar Mass of isoborneol: 154.25 g/mol Mass r…

What is the limiting reactant when equal masses of iron(III) chloride and potass

What is the limiting reactant when equal masses of iron(III) chloride and potassium phosphate react in solution? Choose one answer. A. potassium chloride B. potassium phosphate C.…

What is the magnitude of the acceleration, in \' g \' units (where 1 g = 9.8 m/s

What is the magnitude of the acceleration, in 'g' units (where 1 g = 9.8 m/s2), of a pilot whose aircraft enters a horizontal circular turn with a velocity of v0 = (400 x-directio…

What is the magnitude of the gravitational force of attraction between two elect

What is the magnitude of the gravitational force of attraction between two electrons separated by a distance r? What is the magnitude of the electrical force of repulsion between …

What is the magnitude of the mass\'s acceleration vector, a? The diagram below s

What is the magnitude of the mass's acceleration vector, a? The diagram below shows a block of mass m = 2.00 kg on a frictionless horizontal surface, as seen from above. Three for…

What is the main difference between protein domains and protein subunits? A. Dom

What is the main difference between protein domains and protein subunits? A. Domains are composed mostly of the -helix, while subunits contain both -helices and -strands. B. Each …

What is the main difference between starch and cellulose? A.starch is a linear a

What is the main difference between starch and cellulose? A.starch is a linear arrangement of sucrose units and cellulose is a linear arrangement of glucose units. B.starch is a l…

What is the main product of the following reaction? Assume excess of all reagent

What is the main product of the following reaction? Assume excess of all reagents. The chemical in the ^13C NMR spectrum for this compound are 15.8, 40.1, 51.8, and 170.2. which c…

What is the main purpose for using metal-ions as catalysts in the following hydr

What is the main purpose for using metal-ions as catalysts in the following hydrolysis reaction? increases the rate by making water a stronger base, thereby increasing its electro…

What is the main reason why increasing the temperature speeds up a chemical reac

What is the main reason why increasing the temperature speeds up a chemical reaction? Increasing the temperature raises the energy of activation (E_2). Increasing the temperature …