Chemistry concepts and calculations

9. (18) Conduct a chemical literature search to answer the questions below using

9. (18) Conduct a chemical literature search to answer the questions below using the following compound: 2-pyridinecarbonitrile. Your answer to this question must include: a. The …

9. (25 pts.) Calcium was determined with atomic absorption spectroscopy through

9. (25 pts.) Calcium was determined with atomic absorption spectroscopy through standard addition. Results are provided in the graph below. Samples were prepared by adding 5.00 mL…

9. (6 points) A pair of stereoisomers is shown to exist as a 65:35 mixture at eq

9. (6 points) A pair of stereoisomers is shown to exist as a 65:35 mixture at equilibrium at 27° C. What is the difference in the heats of formation of these two stereoisomers? Wh…

9. (6 points) We have looked at several different coordination numbers and the t

9. (6 points) We have looked at several different coordination numbers and the types of structures they form, based on the ratio rcra. However, we skipped over coordination number…

9. (7 pts) Complete the statement below regarding regulation of the glycolytic p

9. (7 pts) Complete the statement below regarding regulation of the glycolytic pathway. The enzyme which catalyzes the committed step of glycolysis is of this reaction is choice) …

9. (Points:1) Alkanes are hydrocarbons that are used as motor fuels orindustrial

9. (Points:1) Alkanes are hydrocarbons that are used as motor fuels orindustrial solvents. The unbalanced equation forthe combustion of octane is as follows: C8H18(g) + O2(g) CO2(…

9. (Practice) Although the total number of bytes varies from computer to compute

9. (Practice) Although the total number of bytes varies from computer to computer, memory sizes of millions and billions of bytes are common. In computer language, the letter M re…

9. (a) (6 points) Computational problem solving: Algorithm design: Describe a re

9. (a) (6 points) Computational problem solving: Algorithm design: Describe a recursive algorithm to reverse a string that uses the strategy of swapping the first and last charact…

9. *The following data apply to a steam boiler fired with natural gas: Mass flow

9. *The following data apply to a steam boiler fired with natural gas: Mass flow rate of natural gas =0.9kg/s Mass flow rate of air   =19.1 kg/s Ambient temperature   =25 °C Flue …

9. 500ml of 0.3M HCLO4 is combined with 500ml of 0.2M Ca(OH)2. Calculate the mol

9. 500ml of 0.3M HCLO4 is combined with 500ml of 0.2M Ca(OH)2. Calculate the molarity of H+, CLO4-, Ca+2 and OH- ions after the reaction. 10. Gasoline is used to fuel a 4000 pound…

9. A 0.5 M solution of the dissociated sodium salt of a polymer, Na\'P, is place

9. A 0.5 M solution of the dissociated sodium salt of a polymer, Na'P, is placed in the left compartment, 0.3 M NaCl is placed in the right compartment, and the compartments are i…

9. A 52-year-old man with a history of AIDS, hypertension, diabetes mellitus, an

9. A 52-year-old man with a history of AIDS, hypertension, diabetes mellitus, and alcohol abuse was found unconscious in his home by his roommate. In the emergency department, he …

9. A 52-year-old man with a history of AIDS, hypertension, diabetes mellitus, an

9. A 52-year-old man with a history of AIDS, hypertension, diabetes mellitus, and alcohol abuse was found unconscious in his home by his roommate. In the emergency department, he …

9. A and B are stereoisomers. They are nonsuperimposable and are mirror images o

9. A and B are stereoisomers. They are nonsuperimposable and are mirror images of one another Which of the following best describes the relationship between A and B? A. structural…

9. A container holds 50.0 ml of nitrogen at 25 C and a pressureo volume if the t

9. A container holds 50.0 ml of nitrogen at 25 C and a pressureo volume if the temperature increases by 35 C? 10. A sample of oxygen the temperature drops to 0.00° C? toccupies a …

9. A drug that does not dissociate has a molecular weight of 300. If 300 g of th

9. A drug that does not dissociate has a molecular weight of 300. If 300 g of this drug are dissolved in 1000 ml of water, what is the osmolarity (in Osmols/iter or mosmols/liter)…

9. A drug that does not dissociate has a molecular weight of 300. If 300 g of th

9. A drug that does not dissociate has a molecular weight of 300. If 300 g of this drug are dissolved in 1000 ml of water, what is the osmolarity (in Osmols/iter or mosmols/liter)…

9. A flow in which the volume of a fluid and its density does not change during

9. A flow in which the volume of a fluid and its density does not change during the flow is called flow. a. incompressible b.compressible 10. The weight per unit volume of a liqui…

9. A flow in which the volume of a fluid and its density does not change during

9. A flow in which the volume of a fluid and its density does not change during the flow is called flow. a. incompressible b.compressible 10. The weight per unit volume of a liqui…

9. A hypothetical reaction is shown below, in which A, B, C, and D are all coval

9. A hypothetical reaction is shown below, in which A, B, C, and D are all covalent compounds. The number under each "compound" is the standard enthalpy of formation of that subst…

9. A junior chemist was attempting to make the o unsaturated ketone 1 by a mixed

9. A junior chemist was attempting to make the o unsaturated ketone 1 by a mixed Aldol condensation. He instead obtained a mixture of 1 and 2, which made his boss very unhappy. Wh…

9. A laboratory manager decided to investigate the compatibility of four analyst

9. A laboratory manager decided to investigate the compatibility of four analysts in their analysis of nitrite in wastewater using a standard method, which requires a wastewater s…

9. A manometer is attached to an enclosed gas sample, as shown above (Figure 13.

9. A manometer is attached to an enclosed gas sample, as shown above (Figure 13.4). The mercury rises 20 mm 10. A sample of neon gas is at -25°C. What would be its Celsius tempera…

9. A measure of the amount of radiation energy absorbed by the body (usually 1 k

9.         A measure of the amount of radiation energy absorbed by the body (usually 1 kg).                         a.         Curie                           b.         REM      …

9. A measure of the amount of radiation energy absorbed by the body (usually 1 k

9.         A measure of the amount of radiation energy absorbed by the body (usually 1 kg).                         a.         Curie                           b.         REM      …

9. A reaction vessel contains NH3, N2, and H2 at equilibrium at a certain temper

9. A reaction vessel contains NH3, N2, and H2 at equilibrium at a certain temperature. The equilibrium concentrations are [N2] = 0.66 M, [H2] = 1.21 M, and [NH3] = 0.10 M. Calcula…

9. A researcher has produced an extract from a tropical plant that contains a di

9. A researcher has produced an extract from a tropical plant that contains a diprotic acid. The researcher titrates 100.0 mL of the plant extract with 0.100 M NaOH at 25°C. The f…

9. A student recovered 1.375 grams of acetarilide and i 067 grams of benzoic a c

9. A student recovered 1.375 grams of acetarilide and i 067 grams of benzoic a composition of the original mixture? (The % BA and the % AC) What is the percent 10. How does the me…

9. A tablet, with a mass of 1.545 g, is analyzed for the amount of zinc it conta

9. A tablet, with a mass of 1.545 g, is analyzed for the amount of zinc it contains. The tablet is dissolved in water to make 2.00 L of solution. 3.00 mL of this solution is added…

9. According to the Energy Information Administration, about 32 gigatonnes (Gt)

9. According to the Energy Information Administration, about 32 gigatonnes (Gt) of carbon dioxide were emitted to the atmosphere from the global energy sector in 2017. a) If all o…

9. Add about 20 mL of water to the the endpoint, une poin flask to 0. Use techni

9. Add about 20 mL of water to the the endpoint, une poin flask to 0. Use techniques demonstrated your instructor to titrate the acid seconds. with WORAN by and pink for at least …

9. After a rather lengthy organic chemistry synthesis procedure, a student ran t

9. After a rather lengthy organic chemistry synthesis procedure, a student ran the product of the reaction on a TLC plate and obtained the result below. What might have been done …

9. AgBr(s) Ag + (aq) + Br - (aq); Ksp = 1.8 x 10 -13 ----------------(1) Ag

9. AgBr(s) <==> Ag+(aq) + Br-(aq);          Ksp = 1.8 x 10-13 ----------------(1) Ag+(aq) + 2NH3(aq) <==> [Ag(NH3)2]+   Kf   = 1.7 x 107   ----------------(2) --------…

9. An air tank has a pressure of 96 atm when it is in the shade at temperature o

9. An air tank has a pressure of 96 atm when it is in the shade at temperature of 20.0°C. The undisturbed air tank is exposed to sunlight for a long time, and the pressure rises t…

9. Answer of the following: a) Describe what you would do to increase the grain

9. Answer of the following: a) Describe what you would do to increase the grain size of a crystalline material. What would you do if you wanted to decrease it? b) Describe the dif…

9. Assign oxidation states to each atom in the chemical reaction below. Indicate

9. Assign oxidation states to each atom in the chemical reaction below. Indicate the element that is oxidized and the element that is reduced. Indicate the oxidizing agent and the…

9. Assume all of the following will fully dissolve in water at the indicated con

9. Assume all of the following will fully dissolve in water at the indicated concentrations. Which of the following buffers will have the greatest buffering capacity at pH = 5.8 D…

9. Assume that the patient has a blood volume of 5.0 liters and that the blood p

9. Assume that the patient has a blood volume of 5.0 liters and that the blood pH is controlled primarily by the intracellular pH, which is buffered by 1 mM phosphate. The patient…

9. AuCu has this type of bonding A. Ionic B. Covalent C. Metallic 10. Which has

9. AuCu has this type of bonding A. Ionic B. Covalent C. Metallic 10. Which has a higher% ionic bonding and lower% covalent bonding? A. Na2O B. BeO C. Both have the same 11. Which…

9. Balance the following chemical equations. 10 points 9.1 Fe + Cl2 FeCl3 9.2 GH

9. Balance the following chemical equations. 10 points 9.1 Fe + Cl2 FeCl3 9.2 GH, + o2 co2 + H2O + heat 9.3 AI + 02 Al2O3 10. Sodium carbonate (Na CO) is reacted with concentrated…

9. Based on the balanced equation below: 8C0 + 17H, ? C8H18 + 8H20 a. How many g

9. Based on the balanced equation below: 8C0 + 17H, ? C8H18 + 8H20 a. How many grams of CsHis would be formed from 2500ml of carbon monoxide, if carbon monoxide has a density of 1…

9. Based on the information for Solution 2 and the pure benzophenone, calculate

9. Based on the information for Solution 2 and the pure benzophenone, calculate the freezing point depression constant (Kf) for benzophenone. Include the units for the Kf value fr…

9. Calculate the energy of an electron in the 3d principal energy level. a)-7.26

9. Calculate the energy of an electron in the 3d principal energy level. a)-7.26x10 b)+7.26x1019J c) . 2.42x10 d) + 2.42x101 10. Calculate the energy of the photon emitted when an…

9. Calculate the frequency of violet light emitted by a hydrogen atom with a wav

9. Calculate the frequency of violet light emitted by a hydrogen atom with a wavelength of 410.1 nm. a. 9.894 Hz b. 5.433* 1014 c. 1.485* 1014 d. 7.315 104 Hz c. 4.228*10's 10. Gi…

9. Certain race cars use methanol (CH3OH; also called wood alcohol) as a fuel. M

9. Certain race cars use methanol (CH3OH; also called wood alcohol) as a fuel. Methanol has a molecular mass of 32.0 g/mol and a density of 0.79 g/mL. The combustion of methanol o…

9. Change 500.0 mL of a gas at 60.0° C and 800.0 torr to standard conditions. 10

9. Change 500.0 mL of a gas at 60.0° C and 800.0 torr to standard conditions. 10. Change 800.0 mL at 40.0° C and 700.0 mm to standard conditions. I1. Change 60.0 mL at standard co…

9. Change 500.0 mL of a gas at 60.0° C and 800.0 torr to standard conditions. 10

9. Change 500.0 mL of a gas at 60.0° C and 800.0 torr to standard conditions. 10. Change 800.0 mL at 40.0° C and 700.0 mm to standard conditions. I1. Change 60.0 mL at standard co…

9. Consider a 0.15 M solution of H2SO4. Which of the following statements is NOT

9. Consider a 0.15 M solution of H2SO4. Which of the following statements is NOT true? A) This solution would turn litmus to red. B) This solution could neutralize a base. C) This…

9. Consider a container of volume 5.0 L, which is divided into two compartments

9. Consider a container of volume 5.0 L, which is divided into two compartments of equal size. In the left compartment there is nitrogen at 3.0 atm and 25 C. In the right compartm…

9. Consider the coordination compound, K2[Cu(Br)4]. A coordinate covalent bond e

9. Consider the coordination compound, K2[Cu(Br)4]. A coordinate covalent bond exists between A. K+ and Br B. K+ and Cu2+ C. K+ and [Cu(Br)4]2. D. Cu and BrE. Cu2+ and Br 10. Choo…