Chemistry concepts and calculations

1- What is molality of a 1.22 M solution of sugar (C12H22O11)? The density of th

1- What is molality of a 1.22 M solution of sugar (C12H22O11)? The density of the solution is 1.12 grams/ml 2- Which of the following in each pair with be more soluble in water? (…

1- What is the pH of a 0.25 M aqueous solution of C2H5NH3Cl? 2- What would be th

1- What is the pH of a 0.25 M aqueous solution of C2H5NH3Cl? 2- What would be the pH of a buffer solution composed of equimolar amounts of C6H5NH3ClO4 and C6H5NH2 ? 3- What is the…

1- What is the pressure in a 24.0 cylinder filled with 0.780 of nitrogen gas at

1- What is the pressure in a 24.0 cylinder filled with 0.780 of nitrogen gas at a temperature of 305 ? 2- What is the temperature of 0.420mol of gas at a pressure of 1.5atm and a …

1- What size tank would be needed to contain this same amount of helium at atmos

1-What size tank would be needed to contain this same amount of helium at atmospheric pressure (1 atm)? When heated, calcium carbonate decomposes to yield calcium oxide and carbon…

1- When Cu(OH)2 (s) is heated, copper(II) oxide and water are formed. write a ba

1- When Cu(OH)2 (s) is heated, copper(II) oxide and water are formed. write a balanced equation for the reaction? 2- when sulfuric acid and copper(II) oxide are allowed to react, …

1- When falling water strikes the blades of a turbine, the shaft of a generator

1- When falling water strikes the blades of a turbine, the shaft of a generator is rotated and electrical energy is produced – hydroelectric energy. For example, there is a hydroe…

1- When three fatty acid molecules combine with one molecule of glycerol, what f

1- When three fatty acid molecules combine with one molecule of glycerol, what forms? A- one molecule of a triglyceride and one molecule of water B- one molecule of a triglyceride…

1- Which of the curves seems to have the most vertical line around the equivalen

1- Which of the curves seems to have the most vertical line around the equivalence point? Explain why. (If you suspect that your data are inaccurate, explain which one you think s…

1- Which of the following combinations of chemicals could be used to make a buff

1- Which of the following combinations of chemicals could be used to make a buffer solution? HCl/NH3 or HCl/H3PO4 or NaOH/NH3 or HCl/NaOH 2-When equal molar amounts of the followi…

1- Which of the following is an enzyme often used prior to protein sequencing a.

1- Which of the following is an enzyme often used prior to protein sequencing a. Cyanogen bromide b. Trypsin c. Sucrase d. Mercaptoethanol 2- A dietary deficiency of what substanc…

1- Which of the following is an enzyme often used prior to protein sequencing a.

1- Which of the following is an enzyme often used prior to protein sequencing a. Cyanogen bromide b. Trypsin c. Sucrase d. Mercaptoethanol 2- A dietary deficiency of what substanc…

1- Which of these biomolecules are NOT lipids? a) oils b) fats c) fatty acids d)

1- Which of these biomolecules are NOT lipids? a) oils b) fats c) fatty acids d) triglycerides e) steroids (including cholesterol) f) none of the above 3- Which of the following s…

1- Which type of radiation is the most penetrating? gamma alpha beta all have ab

1- Which type of radiation is the most penetrating? gamma alpha beta all have about the same penetrating power 2-Which type of radiation can penetrate a thin piece of lead? gamma …

1- Who is required to make the final decision to terminate a physician’s members

1- Who is required to make the final decision to terminate a physician’s membership on the medical staff and withdraw his or her clinical privileges? The hospital’s governing boar…

1- Write a program that generates three random integers between 0 and 50, calcul

1- Write a program that generates three random integers between 0 and 50, calculate the average, and prints the result to one decimal place? 2- Write a program that reads two inte…

1- Write balanced complete ionic equation for K2SO4( a q )+CaI2( a q )?CaSO4( s

1- Write balanced complete ionic equation for K2SO4(aq)+CaI2(aq)?CaSO4(s)+KI(aq) 2- Write balanced net ionic equation for K2SO4(aq)+CaI2(aq)?CaSO4(s)+KI(aq) 3- Write balanced comp…

1- Write out the chemical reaction that occurs when an aqueous solution of iron(

1- Write out the chemical reaction that occurs when an aqueous solution of iron(III)nitrate reacts with an aqueous solution of potassium iodide to produce an aqueous solution of i…

1- X g of hot water at 80 C is mixed with Y g cold water at 20 C in a perfect ca

1- X g of hot water at 80 C is mixed with Y g cold water at 20 C in a perfect calorimeter. If X > Y, which of the following is true for the final temperature of water? Assume h…

1- a- calculate the de broglie wavelength for a proton with a volacity 3.06% of

1- a- calculate the de broglie wavelength for a proton with a volacity 3.06% of the speed of light. b- calculate the de broglie wavelength for a 5.20 oz baseball with a volacity o…

1- an element crystalizes in a body centered cubic lattice. theedge of the unit

1- an element crystalizes in a body centered cubic lattice. theedge of the unit cell is 3.36 angstroms, and the density of thecrystal is 7.97g/ cm3. what is the atomicweight of th…

1- calculate G for the following reactions: Na2CO3(s) + H2O (l) 2NaOH(aq) + CO2

1- calculate G for the following reactions: Na2CO3(s) + H2O (l) 2NaOH(aq) + CO2 (g) Na2CO3 (aq) + CaCl2 (aq) CaCO3(s) + 2NaCl(aq) 2-Based on the calculation of G above, predict (m…

1- choose all the molecules below that contain at least one ionic bond: H3O+ CH3

1- choose all the molecules below that contain at least one ionic bond: H3O+ CH3OH CH3OK NaOH 2- Choose all compounds which contain at least one sp^2 hybridized at atom H2C=O H2O …

1- pK a of methamphetamine is around 10. When performing an acid-base extraction

1- pKa of methamphetamine is around 10. When performing an acid-base extraction of methamphetamine using water and hexanes, to what pH should you adjust the aqueous layer so that …

1- the determination of melting point was carried out with less than 0.5 cm of c

1- the determination of melting point was carried out with less than 0.5 cm of compound in the capillary tube. How would this effect the melting point? 2- why was it necessary to …

1- the molar mass of gas 1 is the double of the molar mass of gas 2. what is the

1- the molar mass of gas 1 is the double of the molar mass of gas 2. what is the ratio of the distances travelled by these two gases? 2-suppose 3 opened bottles of vinegar (CH3COO…

1- what is the \"experimental\" molecular weight of Benzoic Acid in g/mol the ma

1- what is the "experimental" molecular weight of Benzoic Acid in g/mol the mass of benzoic acid is 1.068 g the mass solvent is lauric acid= 8.084g molality= 1.01 Tf= 38.3 kf=3.9 …

1- what is the major difference in the optical design of a UV- visabile spectrop

1- what is the major difference in the optical design of a UV- visabile spectrophotometer? Explain the importance of this difference. 2- discuss the advantages and disadvantages o…

1- why Pb2+ form a ppt with Cl- and if the ppt placed in hot water it would diss

1- why Pb2+ form a ppt with Cl- and if the ppt placed in hot water it would dissolve? 2- why when NH3(aq) add to the Al3+ it would form solid then if more NH3(aq) been add it woul…

1- write the set of four quantum numbers that could represent the last electron

1- write the set of four quantum numbers that could represent the last electron added ( using the Aufbau principle) to the Cl atom. 2- write the set of four quantum numbers that c…

1-(20 points) A process tank has a volume of 1000 liters. If the feed to the tan

1-(20 points) A process tank has a volume of 1000 liters. If the feed to the tank is pumped at a rate of 50 gallons per minute, what is the residence time of the process? 2-(30 po…

1-(a)Some properties of D-isomenthol are listed. Fill in the corresponding prope

1-(a)Some properties of D-isomenthol are listed. Fill in the corresponding properties for L-isomenthol. i believe that the corresponding numbers for L-isomenthol should be exactly…

1-) identify the substance that most capable of conducting electricity. A) water

1-) identify the substance that most capable of conducting electricity. A) water B) solid NaCl C) sugar dissolved in water D) NaCl dissolved in water E) solid sugar 2-) use the da…

1----A solution contains 7.65×10 -3 M ammonium carbonate and 1.21×10 -2 M potass

1----A solution contains 7.65×10-3 M ammonium carbonate and 1.21×10-2 M potassium hydroxide. Solid copper(II) nitrate is added slowly to this mixture. What is the concentration of…

1-1. A network is a communication system that allows different hosts to work tog

1-1.      A network is a communication system that allows different hosts to work together. a.         True. b.         False. 1-2.      A network is a communication system that a…

1-1. A network is a communication system that allows different hosts to work tog

1-1.      A network is a communication system that allows different hosts to work together. a.         True. b.         False. 1-2.      A network is a communication system that a…

1-1. A network is a communication system that allows different hosts to work tog

1-1.      A network is a communication system that allows different hosts to work together. a.         True. b.         False. 1-2.      A network is a communication system that a…

1-10 1-10 1. Which of the following is a simple enzyme? a. An enzyme that has bo

1-10 1-10 1. Which of the following is a simple enzyme? a. An enzyme that has both a protein and a nonprotein portion b. An enzyme that requires Mg+ ion for activity c. An enzyme …

1-10 Name Post-Lab Questions I How can potassium thiocyanate be used to confirm

1-10 Name Post-Lab Questions I How can potassium thiocyanate be used to confirm that Fel ioms have bee odized to Fo 2 Use the oxidation state rules to assign oxidation states for …

1-2. Friction factorffor an incompressible flow through a smooth pipe is approxi

1-2. Friction factorffor an incompressible flow through a smooth pipe is approximately 16 if Re s 2100 0.0791 Re Re > 2100 Where Re is a Reynolds number. 1. Write a function fi…

1-20, Multiple Choice. Mark the letter of the best choice on your Grademaster fo

1-20, Multiple Choice. Mark the letter of the best choice on your Grademaster form. Only one answer is possible for each question. (2 pts each) For questions 1&2, an expandabl…

1-3 1-3 1. A saturated solution of PbCl2 was found to have a lead ion concentrat

1-3 1-3 1. A saturated solution of PbCl2 was found to have a lead ion concentration of 85 x 10 3 M at 25 What is the Kup for the compound? 2. Calculate the molar solubility of A&a…

1-3 Computer Programming: Programming Problem Using the Java Development Kit and

1-3 Computer Programming: Programming Problem Using the Java Development Kit and jGrasp, develop a program in response to the following prompt:Write a program that prompts the use…

1-4 show all work! List the CAS number and hazards associated with benzophenone,

1-4 show all work! List the CAS number and hazards associated with benzophenone, C_13H_10O. Define the following terms clearly and concisely. molality K_f Solute Salt, NaCl, has a…

1-4:Write and balance the symbolic equations. 1. magnesium hydroxide reacts with

1-4:Write and balance the symbolic equations. 1.                 magnesium hydroxide reacts with hydrochloric acid in your stomach ________________________________________________…

1-5 please, thanks! Enter the BEST ANSWER for each question, YOUR NAME (last nam

1-5 please, thanks! Enter the BEST ANSWER for each question, YOUR NAME (last name first), & your OU ID NUMBER on the scantro 1. Which of the following reaction steps proceed d…

1-6 1. A given reaction has a (AG of 413 kJ/mol. Based on this information which

1-6 1. A given reaction has a (AG of 413 kJ/mol. Based on this information which of the following statements must be true? a) The reaction is thermodynamically favored (spontaneou…

1-6 please and thank you! Name Date Desk Laboratory Instructor Atomic Spectra 12

1-6 please and thank you! Name Date Desk Laboratory Instructor Atomic Spectra 12 Pre-lab Questions and Atomic Structure following questions. periment in the laboratory, you should…

1-7 please and can you please show work so I can understand nbit, Choose the one

1-7 please and can you please show work so I can understand nbit, Choose the one wisermative that bthers the statement or answers the question 1) A sample of gas initilly t 400tm …

1-A 0.255 gram sample of a weak base is dissolved in 100.0 ml of distilled water

1-A 0.255 gram sample of a weak base is dissolved in 100.0 ml of distilled water. A 20.0 ml sample of this solution is titrated with 0.100 M HCl. A colorimetric indicator, pKa = 5…

1-A 0.511 g sample of a nonvolatile, yellow crystalline solid dissolves in 13.0

1-A 0.511 g sample of a nonvolatile, yellow crystalline solid dissolves in 13.0 g of benzene, producing a solution that freezes at 5.39 oC. Find the molar mass of the yellow solid…