Chemistry concepts and calculations

15. Artange the folowing based on INCREASING melting point 40mg of the sample wa

15. Artange the folowing based on INCREASING melting point 40mg of the sample was recrystaliced at 30'C using 50mL of the chosen solvent If the sample was recrystalled torn a satn…

15. Asample of a compound known to consist of only carbon, hydrogen is found wo

15. Asample of a compound known to consist of only carbon, hydrogen is found wo a total mass of g lf the mass have the mass of of the carbon is 1802 g formula of the hydrogen is 3…

15. Assuming a large excess of benzene, what is the major product of the followi

15. Assuming a large excess of benzene, what is the major product of the following reaction? AIC1 e. not a.-d. 16. The Wolff-Kishner reaction is a how many electron reduction? Hin…

15. Calculate the pH values based on the concentration of hydrogen ions which fo

15. Calculate the pH values based on the concentration of hydrogen ions which food item is more acidic than the other. Show your work [2 pts] Bananas '5 10-1 what al Hu pH vain 1 …

15. Car Instrument Simulator For this assignment you will design a set of classe

15. Car Instrument Simulator For this assignment you will design a set of classes that work together to simulate a car?s fuel gauge and odometer. The classes you will design are: …

15. Catalytic hydrogenation of which of the tollowing will isopentane? a. CHs CH

15. Catalytic hydrogenation of which of the tollowing will isopentane? a. CHs CH2 CCH H2 b. CH2 CHCH (CH,) 2 e. All of these 16. The most stable conformation of 1,2-ethanediol (et…

15. Choose correct IUPAC name for KIV(OH2)2Brs A. potassium dihydroxytetrabromov

15. Choose correct IUPAC name for KIV(OH2)2Brs A. potassium dihydroxytetrabromovanadate (III) B. potassium d D. vanadium d e(IV) 16. Which particle has the highest penetrating pow…

15. Compared with the atomic radius of oxygen (z-8), the atomic radius of sulfur

15. Compared with the atomic radius of oxygen (z-8), the atomic radius of sulfur (z 16) is a. larger because the n quantum number increases. b. larger because the quantum number i…

15. Complete the following reaction in aqueous solution and select the spectator

15. Complete the following reaction in aqueous solution and select the spectator ions Fe(NO3)2 + (NH4)2CO3 A) Fe? (aq), NH(aq), NOs(aq), COs (aq) B) Fe (aq) NOs (aq) C) NHs (aq). …

15. Consider the following reaction. N2 (g) + 3 H2 (g) 2 NH3 (g) 1.0 atm of N2 a

15. Consider the following reaction. N2 (g) + 3 H2 (g) 2 NH3 (g) 1.0 atm of N2 and 1.0 atm of H2, are mixed in a container at 1000 K. At this temperature, Kp = 2 x 10-3 The equili…

15. Consider the reaction CO(g) + ½ Odg--COdg) at equilibrium. What will happen

15. Consider the reaction CO(g) + ½ Odg--COdg) at equilibrium. What will happen if the sure is increased at constant temperature by adding an inert gas? a. Nothing will happen. b.…

15. Consider the reaction of elemental hydrogen gas (H 2 ) and elemental oxygen

15. Consider the reaction of elemental hydrogen gas (H2) and elemental oxygen gas (O2) to form water. How many molecules of water will be made by the reaction of 6.0 g of O2 gas? …

15. Consider the titration of a 25.00 ml sample of 0.125 M (CH3)2NH with 0.150 M

15. Consider the titration of a 25.00 ml sample of 0.125 M (CH3)2NH with 0.150 M HClO4. Determine each of the following. All work must be shown for credit. (a) the pH before addit…

15. Ethers are in water. (Points: 1) O slightly soluble O very soluble O complet

15. Ethers are in water. (Points: 1) O slightly soluble O very soluble O completely insoluble unstable 16. Oxidation of a thiol produces a (Points 1) O salt O aldehyde ketone O di…

15. Explain why the heat of vaporization of a substance is much greater than the

15. Explain why the heat of vaporization of a substance is much greater than the heat of fusion for the same substance. Please show all work with the correct answer. Thank you!!!!…

15. For Hg2I2 Ksp = 4.6 x 10^-29 a) Ve volume of KI added = 0.1 M x 25 ml/0.2 M

15. For Hg2I2 Ksp = 4.6 x 10^-29 a) Ve volume of KI added = 0.1 M x 25 ml/0.2 M = 12.5 ml [Hg2I2] formed = 0.1 m x 25 ml/(25 + 12.5) ml = 0.067 M ICE chart                Hg2I2 &l…

15. Former Texas congressman Tom Delay was previously employed as an exterminato

15. Former Texas congressman Tom Delay was previously employed as an exterminator. Assume hire Tom's Pest Control Company to apply an insecticide in your house. At a temperature o…

15. If molecular orbital diagram for diatomic molecule shows that it has two ele

15. If molecular orbital diagram for diatomic molecule shows that it has two electrons that exist in orbitals by themselves , what can we predict about the substance? A. It is par…

15. In expirement 8, you used a serial titration method to titrate an unknown sa

15. In expirement 8, you used a serial titration method to titrate an unknown sample of HCl with 0.10 M NaOH using a BTB indicator. Suppose the unknown had a concentration of 0.45…

15. In the following reaction, 6.00 kg of CaF2 is treated with an excess of H2SO

15. In the following reaction, 6.00 kg of CaF2 is treated with an excess of H2SO4, and produces 2.86 kg of HF. Calculate the percent yield of HF CaF2 + H2SO4 CaSO4 +2HF A) 93.0% B…

15. Lead crystallizes in the face-centered cubic lattice. What is the coordinati

15. Lead crystallizes in the face-centered cubic lattice. What is the coordination mumber for A) 4 B) 6 C)8 D) 10 E) 12 16. The complex ions (Cr(en CIBr]Br and [Cren)-Br:)C l are …

15. On the phase diagram below the critical point is UD.the line representing me

15. On the phase diagram below the critical point is UD.the line representing melting is .2. and the line representing sublimation is C3) (a tm) 80 40 50 70 30 T d e g r e e s C) …

15. PROPERTIES OF A CATION EXCHANGE RESIN-Fe UNKNOWN Introduction lon-exchange c

15. PROPERTIES OF A CATION EXCHANGE RESIN-Fe UNKNOWN Introduction lon-exchange chromatography is used to exchange the ions in a solution (not just a catchy name!). The analyte ion…

15. PROPERTIES oFACATION EXCHANGE RESIN- Fe\'s UNKNOWN Introduction name!) hange

15. PROPERTIES oFACATION EXCHANGE RESIN- Fe's UNKNOWN Introduction name!) hange chromatography i used to exchange the ions solution to a catchy attached Ion-exc are attracted to i…

15. Provide the structure of product A in the scheme below 2 mol BrF Product A?

15. Provide the structure of product A in the scheme below 2 mol BrF Product A? 16· The least and most reactive compounds in acid-catalyzed hydration would bo: IV Least reactive M…

15. Select the correct electron configuration for sulfur (Z-16) p 2s 2p B. 13232

15. Select the correct electron configuration for sulfur (Z-16) p 2s 2p B. 132322p 3 3p C. 1232p 3s 3p 16. Select the correct electron configuration for Cu (Z-29) A. [Ar]423 B. [A…

15. The complex ion Ag(NH,) is formed by mixing 5.00 mL of AgNO, and with 5.00 m

15. The complex ion Ag(NH,) is formed by mixing 5.00 mL of AgNO, and with 5.00 mL of aqueous NH,. The complex forms according the equation Ag. (aq) + 2 NH, (aq) Ag(NHih" (aq) . In…

15. The heat transfer problems encountered in practice can be considered in two

15. The heat transfer problems encountered in practice can be considered in two groups A. vibrational and rotational problems B. external and internal problems C. rating and sizin…

15. The iodine liberated by the addition of an excess of KI and H2SO4 to 25.00 m

15. The iodine liberated by the addition of an excess of KI and H2SO4 to 25.00 mL of 0.0236 M KIO required 23.55 mL of a solution for Na S2Os for titration using starch as the ind…

15. The measurement, 0.030 g, has significant digits. A. 1 B. 2 C. 3 D. 4 16. A

15. The measurement, 0.030 g, has significant digits. A. 1 B. 2 C. 3 D. 4 16. A student reacted a piece of zinc with a blue solution. A dull, reddish, brown solid formed, and afte…

15. The production of ADP and in reaction. NAME organic phosphate ion from ATP i

15. The production of ADP and in reaction. NAME organic phosphate ion from ATP is representative of a (m) B) condensation C) D) transfer hydrolysis E) endothermic 16. Which of the…

15. The reaction rates of many spontaneous reactions are actually very slow. Whi

15. The reaction rates of many spontaneous reactions are actually very slow. Which of these statements is the best explanation for this observation? A) Kp for the reaction is less…

15. The standard heat of formation, H f, is defined as the enthalpy change for t

15. The standard heat of formation, Hf, is defined as the enthalpy change for the formation of one mole of substance from its constituent elements in their standard states. Thus, …

15. To prepare 250.0 mL of a 0.07500 M solution of AgNO, from the solid reagent,

15. To prepare 250.0 mL of a 0.07500 M solution of AgNO, from the solid reagent, what mass of reagent must be used?AgNO3 169.87 g/mol (A) 3.185 g (C) 75.00g 2500 0.2S Molar Mass o…

15. Tollbooths in Illinois accept all U.S. coins, including pennies. Carlos has

15. Tollbooths in Illinois accept all U.S. coins, including pennies. Carlos has a very large supply of pennies, nickels, dimes, and quarters in his car as he drives on a toll way.…

15. What is the balanced spontaneous reaction and standard cell potential of an

15. What is the balanced spontaneous reaction and standard cell potential of an electrochemical cell constructed from half cells with the following half reactions? Cu"(aq) + 2e- C…

15. What is the change in enthalpy for the reaction of 4.00 mol of iron(ll) oxid

15. What is the change in enthalpy for the reaction of 4.00 mol of iron(ll) oxide? Show Work 6FeO(s) + Odg)- 2FeOu(s) + 635 kJ a.-635 k b.-423 k c.-106 k d. 106 kJ e. 635 k 16. Th…

15. What will the freezing point (in question 14) do when lots of salt is dissol

15. What will the freezing point (in question 14) do when lots of salt is dissolved in the water a. increase b. decrease c. stay the same 16. The volume of a gas is directly propo…

15. Which ONE of the choices below is the correct way to complete the sentence?

15. Which ONE of the choices below is the correct way to complete the sentence? Reverse osmosis is the application of a pressure that is greater than the osmotic pressureA) –to a …

15. Which is the equilibrium constant expression for the first step of the ioniz

15. Which is the equilibrium constant expression for the first step of the ionization of H,BO, in water? 18. Which of the following is a K xprestion? hio that can be use d to writ…

15. Which molecule or ion below is amphipathic? 16. Which statement explains the

15. Which molecule or ion below is amphipathic? 16. Which statement explains the cleaning action of soap on greasy dishes?             1. The soap changes the water-solubility of …

15. Which molecule(s) can form hydrogen bonds with woter? A) H,S B) CHr-OH D) Mo

15. Which molecule(s) can form hydrogen bonds with woter? A) H,S B) CHr-OH D) More than one above. E) None of the above. 16. What is the empirical formula for the ionic crystal st…

15. Which of the f substances in water is FALSE? ollowing statements concerning

15. Which of the f substances in water is FALSE? ollowing statements concerning solubility of various A) The solubility of a liquid in water increases with increasing polarity B) …

15. Which of the following information is primaridy obssined from ih A. arrangem

15. Which of the following information is primaridy obssined from ih A. arrangement of carbon and hydrogen atoms in a compouna C. ary conjugated a system present in a compound E, …

15. Which of the following is the correct label for CH 3 COO - a. acid b. conjug

15. Which of the following is the correct label for CH3COO- a. acid b. conjugate base c. base d. conjugate acid 16. The equilibrium constant, K, for this reaction is 2.4×106 at 25…

15. Which of the following statements is TRUE? An orbital is the volume in which

15. Which of the following statements is TRUE? An orbital is the volume in which we are most likely to find an electron. Part of the Bohr model proposed that electrons in the hydr…

15. Which of the following statements regarding reaction rates and kinetic molec

15. Which of the following statements regarding reaction rates and kinetic molecular theory is NOT true? Higher concentrations of reactants typically lead to greater reaction rate…

15. Which of the tollowing reagentís) gives the reaction below (A) CH,CI (B) CFe

15. Which of the tollowing reagentís) gives the reaction below (A) CH,CI (B) CFe (C) CW AICI (D) Cly FeCl Cly HCI 16. Which of the following functional groups are m-directing? (A)…

15. Which one of the following compounds gives s methyl 3.beptanol with LiAIH, b

15. Which one of the following compounds gives s methyl 3.beptanol with LiAIH, by water? followed E) V B) II. D) IV A) I C) III 16. What would be the product of the following reac…

15. Which statement is correct? of protons and neutrons. a. Electrons have a muc

15. Which statement is correct? of protons and neutrons. a. Electrons have a much smaller mass than that b. Protons are much more massive than neutrons. protons and neutrons. c. E…