Chemistry concepts and calculations

11. A student adds o.1 molof oxalic phosphate to enough water to make 1.0 Lof so

11. A student adds o.1 molof oxalic phosphate to enough water to make 1.0 Lof solution. The following equilibrium is established with the about the products greater than the conce…

11. A student wants to make 12.50 mL of 0.36M HCl solution. She has 6.000M HCl s

11. A student wants to make 12.50 mL of 0.36M HCl solution. She has 6.000M HCl stock solution available to her; how much water should she combine with an appropriate volume of sto…

11. An adult takes about 15 breathes per minute with each breath having a volume

11. An adult takes about 15 breathes per minute with each breath having a volume of 500 mL. If the air that is inhaled is dry, but exhaled at 1 atm is saturated with water vapor a…

11. Assuming equal concentrations of conjugate base and acid, which one of the f

11. Assuming equal concentrations of conjugate base and acid, which one of the following mixtures suitable for making a buffer solution with an optimum pH of 4.6-4.8? A CH,coo,NaC…

11. Calcula n AL V. Specific Heat Capacity of an unknown Metai 1. Volume of wate

11. Calcula n AL V. Specific Heat Capacity of an unknown Metai 1. Volume of water mL. 2. Calculate the mass of water 3. Mass of unknown metal 4. Initial temperature of water in ca…

11. Calculate the Bot maximum number of moles of hydrogen bonds that can form in

11. Calculate the Bot maximum number of moles of hydrogen bonds that can form in a sample of 68 num iqud ammonla, NiHi (Answer imoles) b. How many hydrogen bonds will be in 24 Lit…

11. Calculate the change in the Gibbs energy and molar Gibbs energy of 1.0 dm3 o

11. Calculate the change in the Gibbs energy and molar Gibbs energy of 1.0 dm3 of octane (liquid) when its pressure is acting on the liquid is increased from 1.00 atm to 100 atm. …

11. Calculate the osmotic pressure of a 1 M solution of NaC a. I atm b. 22.4 atm

11. Calculate the osmotic pressure of a 1 M solution of NaC a. I atm b. 22.4 atm e. 11.2 atm d. 44.8 atm e. 5.6 atm 12. Calculate the pKa of a weak base with Ks value of 3.1 x 104…

11. Consider the following equilibrium: Fe3+(aq) + SCN-(aq) FeSCN2+(aq) Initial

11. Consider the following equilibrium: Fe3+(aq) + SCN-(aq) FeSCN2+(aq) Initial concentrations: [Fe3+] = 0.590; [SCN-] = 1.239; [FeSCN2+] = 0 The equilibrium concentration of [FeS…

11. Consider the titration of equal volumes of ic acid) with 0.1 M NaOH. W (A) (

11. Consider the titration of equal volumes of ic acid) with 0.1 M NaOH. W (A) (B) (C) hich of the following would be the same for both titrations? the initial pH the pH at the ha…

11. Determining the molecufar contributions to the hydrophobic effect-Enthalpic

11. Determining the molecufar contributions to the hydrophobic effect-Enthalpic effects: al In general, does a nonpolar molecule have stronger interactions with another nanpolar m…

11. Ethene (C,H) reacts with oxygen to form carbon dioxide and water. The box be

11. Ethene (C,H) reacts with oxygen to form carbon dioxide and water. The box below shows a mixture of reactants (ethane and oxygen) before any reaction occurs. The total pressure…

11. Find the index of refraction of water using the diagram provided separately

11. Find the index of refraction of water using the diagram provided separately from Giancoli, 4/e, Fig. 32-21(a) 12. A triangular prism shown is made of glass with index of refra…

11. For each of the elements below, there are only two naturally occurring isoto

11. For each of the elements below, there are only two naturally occurring isotopes. Using the average atomic masses on the periodic table, identify the pair in which the heavier …

11. For each of the elements below, there are only two naturally occurring isoto

11. For each of the elements below, there are only two naturally occurring isotopes. Using the average atomic masses on the periodic table, identify the pair in which the heavier …

11. For the reaction: 2A+B-products, write the rate expression for this reaction

11. For the reaction: 2A+B-products, write the rate expression for this reaction and the rate constant with proper units given the following data: Initial Rate M A. 0.10 0.30 0.20…

11. Give formulas of the following compounds: Disulphur dichloride b. Tetraphosp

11. Give formulas of the following compounds: Disulphur dichloride   b. Tetraphosphorus trisulfide       c.    Carbon disulfide         d. Sulfur trioxide 12. What are the name an…

11. How many grams of BaCl2 (molar mass = 208.2 g/mol) do you have to add to 250

11. How many grams of BaCl2 (molar mass = 208.2 g/mol) do you have to add to 250.0 mL of water to have a chloride ion concentration of 0.0125 M? a. 0.325 g b. 1.30 g c. 0.163 g d.…

11. How many grams of KClO 3 are required to make 50.0 mL of 0.100 M KClO 3 solu

11. How many grams of KClO3 are required to make 50.0 mL of 0.100 M KClO3 solution? Write instructions on how the solution would be prepared.                                      …

11. How many moles of oxygen atoms are there in 10 moles of KCIOs? A) 3 mol B) 3

11. How many moles of oxygen atoms are there in 10 moles of KCIOs? A) 3 mol B) 3.3 mol C) 10 mol D) 30 mol E) 6.02 x 104 mol 10 12. What is the mass of 8.25 x 1019 UFe molecules? …

11. Hydrogen, bromine and HBr are in equilibrium in a 1-L container. H2(g) + Br2

11. Hydrogen, bromine and HBr are in equilibrium in a 1-L container. H2(g) + Br2(g) 2 HBr(g) + 68 kJ How will each of the following changes affect the indicated quantities? Write …

11. If Molecule I has lal +12 then what is for lal 21 is determined by (A) -12.

11. If Molecule I has lal +12 then what is for lal 21 is determined by (A) -12. 12. (D) impossible to tell from the information provided What is the IUPAC name for 17. What is max…

11. If the pKa of HCHO2 is 3.74 and the pH of an HCHO2/NaCHO2 solution is 3.89,

11. If the pKa of HCHO2 is 3.74 and the pH of an HCHO2/NaCHO2 solution is 3.89, w following is TRUE? b. [HCI 1021-[NaCHO21 d. HCHO2INaCHO21 12. In which of these solutions would s…

11. In the unbalanced reaction __KClO4(s) __KClO3(s) + __O2(g), is potassium oxi

11. In the unbalanced reaction __KClO4(s) __KClO3(s) + __O2(g), is potassium oxidized or reduced? a. Oxidized b. Reduced c. Both d. Neither 12. In the unbalanced reaction __KClO4(…

11. Indicate whether an aqueous solution of the following compounds is acidic, n

11. Indicate whether an aqueous solution of the following compounds is acidic, neutral, or basic (NEN, NPC). a) (3) KClO3. b) (3) FeBr3 - 12. NEN and NPC for this question. Answer…

11. It took 1 min. and 37 sec for a given volume of chlorine to effuse through a

11. It took 1 min. and 37 sec for a given volume of chlorine to effuse through a pinhole under given conditions of temperature and pressure. How long will it take for the same vol…

11. Li was determined by the method of standard additions using atomic emission.

11. Li was determined by the method of standard additions using atomic emission. From the data in the following table, calculate the concentration of Li in the unknown solution. T…

11. Metal ions in aqueous solutions are solvated, or hydrated by water molecules

11. Metal ions in aqueous solutions are solvated, or hydrated by water molecules. Typically this primary hydration sphere is composed of six water molecules. The hydrated metal io…

11. Now suppose a chemical process consists of a particle transfering back and f

11. Now suppose a chemical process consists of a particle transfering back and forth between a site A that is non-degenerate and a doubly degenerate site B. The energy difference …

11. One of the reactions that take place inside a blast furnace to produce iron

11.   One of the reactions that take place inside a blast furnace to produce iron is the reduction of iron ore by carbon monoxide. Choose the answer that represents the sum of all…

11. One of the standard indicators for iodimetric titration is starch. Starch fo

11. One of the standard indicators for iodimetric titration is starch. Starch forms a dark blue complex with iodine (I2) that can be measured spectrophotometrically to quantify th…

11. Oxidation is the process whereby electrons are the process where electrons a

11. Oxidation is the process whereby electrons are the process where electrons are while reduction is 12. Write oxidation or reduction beside the following a. Bromine atom (Br) be…

11. Peptide bond formation catalyzed by a wild type (WT) ribosome exhibits a tra

11. Peptide bond formation catalyzed by a wild type (WT) ribosome exhibits a transition state enthalpy change H± = +14.0 kcal/mol and TS± = +2.0 kcal/mol. A mutant (MUT) ribosome …

11. Propanoic acid (CH3CH2COOH) reacts as a weak acid when dissolved in water, w

11. Propanoic acid (CH3CH2COOH) reacts as a weak acid when dissolved in water, with Ka = 1.7×10^-5 at 25°C. CH3CH2COOH(aq) + H2O() -- CH3CH2CO-(aq) + H3O+ (aq) (4 pts) (a). Write …

11. Refer to instructions. The electrophile in this reaction is indicated by let

11. Refer to instructions. The electrophile in this reaction is indicated by letter_ f o r n ltiple Choice tify the choice that best completes the statement or answers the questio…

11. Short Answer Imagine an alternate universe in which space unicorns and neon

11. Short Answer Imagine an alternate universe in which space unicorns and neon pegasi (the plural form of pegasus) exist. In this world, the value of ber can have only one value …

11. Shown below is a phase diagram for a substance. Several points (A-F) are ind

11. Shown below is a phase diagram for a substance. Several points (A-F) are indicated on the phase diagram. B D 1 atm Temperature I. ndicate the phases of matter present when the…

11. Small quantities of hydrogen gas can be prepared in the laboratory by the ad

11. Small quantities of hydrogen gas can be prepared in the laboratory by the addition of aqueous hydrochloric acid to metallic zinc. Provide the balanced chemical equation: Typic…

11. Stainless steel is less susceptible to rusting than iron because ________ A.

11. Stainless steel is less susceptible to rusting than iron because ________ A. the carbon within the alloy polymerizes to form a protective film. B. the silicon within the alloy…

11. Suppose that there are ten resources available to three processes. At time 0

11. Suppose that there are ten resources available to three processes. At time 0, the following data is collected. The table indicates the process, the maximum number of resources…

11. Table 1. Specific Heats of Various Metals (3 pts for a, 3 pts for b) Element

11. Table 1. Specific Heats of Various Metals (3 pts for a, 3 pts for b) Element Aluminum Tin Magnesium Lead Zinc 0.9012 0.2167 0.4686 0.1289 0.3883 In a coffee cup calorimeter, y…

11. The centigram balance is most sensitive out of all the balance such as elect

11. The centigram balance is most sensitive out of all the balance such as electronic balance. a. True b. False 12. A group of four one cent coins is weighed on an electronic bala…

11. The dipole moment of the C-Cl bond is 1.67 and the dipole moment of the C-F

11. The dipole moment of the C-Cl bond is 1.67 and the dipole moment of the C-F bond is 1.65. This is best explained by A. C-CI has a smaller charge separation than C-F due to ele…

11. The equivalence point of a strong base: a. Is at pH-7 b. Is above pH7 c. is

11. The equivalence point of a strong base: a. Is at pH-7 b. Is above pH7 c. is below pH #7 12. The equivalence point of a weak acid: a. is at 7 b. Is above pH 7 c. Is below pH 7 …

11. The following reaction is at equilibrium a. Does this reaction favor the rea

11. The following reaction is at equilibrium a. Does this reaction favor the reactants or products at equilibrium? Explain your answerl2pts) b. Write the equilibrium constant expr…

11. The iron(III) complex of tetraphenylporphyrin, Fe(TPP)Cl, and its reaction w

11. The iron(III) complex of tetraphenylporphyrin, Fe(TPP)Cl, and its reaction with 2-methyl imidazole, 2-Melm, are shown below: CI 2-Melm HN Fe(TPP)C Fe(TPPIC (side view) (side v…

11. The mass balance equation for F in a 0.02 M aqueous solution of KF is: (B) [

11. The mass balance equation for F in a 0.02 M aqueous solution of KF is: (B) [HFI+ IF1+K1- 0.02 M (C) HFI+IF1+K]+H1+IOH]-0.02 M (D) [F] = 0.02 M (E) [HF] + [F] = 0.02 M 12. Whic…

11. The reaction 2D + 3X B + 3 Y has a rate law rate-k mol L1 k[D][X]. The units

11. The reaction 2D + 3X B + 3 Y has a rate law rate-k mol L1 k[D][X]. The units for the rate constant mol-L-12 12. If an equilibrium constant is larger than the reactio product f…

11. The reaction of gaseous sodium azide (NaN3) to form sodium metal and molecul

11. The reaction of gaseous sodium azide (NaN3) to form sodium metal and molecular nitrogen is the reaction used in some automobile airbags. When a car decelerates very quickly, a…

11. The sequence of a 29 aa long peptide can be determined from the following da

11. The sequence of a 29 aa long peptide can be determined from the following data: a) Treatment of the peptide with Sanger's reagent (FDNB) reveal Val. Which terminus is thist N-…