Chemistry concepts and calculations

8. A car going down a long, steep incline can cause its brakes to fail by the dr

8. A car going down a long, steep incline can cause its brakes to fail by the driver over-using them. This is called "riding your brakes" and it occurs because the brakes work by …

8. A chemist carries out an iodimetric titration to determine the vitamin C cont

8. A chemist carries out an iodimetric titration to determine the vitamin C content of some supplement tablets. A KIO, solution was prepared by dissolving 1.057 gof KIO, in a 500 …

8. A cuprate will not react with which of the following functional groups? a. b.

8. A cuprate will not react with which of the following functional groups? a. b. c. d. An enone An acid chloride An ester An aldehyde 9. What is the initial product (ie before any…

8. A depth filter has been converted to an idealized model and can be described

8. A depth filter has been converted to an idealized model and can be described mathematically. The target efficiency of one individual fiber is 30% Each row of fibers has collect…

8. A lake in the Swiss Alps has an alkalinity of 20 mg/L as CaCO 3 . How many mo

8. A lake in the Swiss Alps has an alkalinity of 20 mg/L as CaCO 3 . How many moles/L of acid could be neutralized by the water in this lake? 9. A water supply has very hard water…

8. A lake in the Swiss Alps has an alkalinity of 20 mg/L as CaCO3. How many mole

8. A lake in the Swiss Alps has an alkalinity of 20 mg/L as CaCO3. How many moles/L of acid could be neutralized by the water in this lake? 9. A water supply has very hard water w…

8. A paper chromatography experiment is performed The solvent front directly abo

8. A paper chromatography experiment is performed The solvent front directly above the spot, travelled 13.57 mm. The spot travelled 4.1 mm. What is the R,value for the amino acid …

8. A patient in the hospital is running a temperature of 39.5°C; what is this in

8. A patient in the hospital is running a temperature of 39.5°C; what is this in Fahrenheit? A) 999F B) 101.3°F C) 102.4°F D) 103.1°F E) 104°F What is the volume of a container th…

8. A soccer player kicks a soccer ball of mass 0.45 kg that is initially at rest

8. A soccer player kicks a soccer ball of mass 0.45 kg that is initially at rest. The player’s foot is in contact with the ball for 3.0x10-3 s. The force exerted on the ball by th…

8. A solution that has a pH of 2 is how many times more acidic than a solution w

8. A solution that has a pH of 2 is how many times more acidic than a solution with a pH of 6 9. What is the pH of a solution with a hydronium ion [H] concentration of 5.2 x 1011 …

8. A student collected the following data: Temperature of the water bath 90.0°C,

8. A student collected the following data: Temperature of the water bath 90.0°C, .OUJ Of barometric pressure = 765.0 torr, and the volume of the flask-260.0 mL Un- known to the st…

8. A student conducts an experiment to determine the enthalpy of solution for li

8. A student conducts an experiment to determine the enthalpy of solution for lithium chloride dissolved in water. The student combines 5.00 grams of lithium chloride with 100.0 m…

8. A student weighed 0.2 g of unknown oxide into a 250 ml conical flask. 50.00 m

8. A student weighed 0.2 g of unknown oxide into a 250 ml conical flask. 50.00 ml HCI was added immediately to the flask which reacted with the oxide. The excess HCI was then titr…

8. A. A first order chemical reaction has a half-life of 10 minutes, what is the

8. A. A first order chemical reaction has a half-life of 10 minutes, what is the rate constant (k) for this reaction. B. If a first order reaction has a rate constant (k) of.01 mi…

8. After discovering that the chemistry storeroom was outof ‘primary standard, K

8. After discovering that the chemistry storeroom was outof ‘primary standard, KHP’, the CHM 144 Instructordecided to substitute oxalic acid dihydrate (OAD;H2C2O4·2H2O) for the st…

8. All-- -(functional groups) should dissolve in acid? A. amines B 8. ketones C.

8. All-- -(functional groups) should dissolve in acid? A. amines B 8. ketones C. esters D carboxylic acids E. amides 9. How much excess acid exists in the first step of the proced…

8. Ammonia is formed from the reaction as follows: N2 (g) + 3 H2 (g) ----> 2 NH3

8. Ammonia is formed from the reaction as follows: N2 (g) + 3 H2 (g) ----> 2 NH3( g )Determine (a) the order of each reactant, (b) the order of the reaction, (c) write the rate…

8. An 0.3130 g primary standard sodium oxalate, Na 2 C 2 O 4 (134.0 g/mol), was

   8. An 0.3130 g primary standard sodium oxalate, Na2C2O4 (134.0 g/mol), was dissolved in 75 mL of distilled water, acidified with sulfuric acid and titrated with a K2Cr2O7 solut…

8. An a-helix would be stabilized most by: A the presence of an Arg + residue ne

8. An a-helix would be stabilized most by:        A     the presence of an Arg+ residue near the carboxyl terminus of the a-helix.        B     the transmission of the protons of …

8. An electrolytic cel: a. Would be good to plate chromium or nickel on a car bu

8. An electrolytic cel: a. Would be good to plate chromium or nickel on a car bumper b. Would be good to use in a pacemaker due to its long life ould be good when you need a recha…

8. An electron in the ground state of the hydrogen atom moves at an average spee

8. An electron in the ground state of the hydrogen atom moves at an average speed of 5x 100 m/s. If the speed is known to an uncertainty of 20%, what is the minimum uncertainty in…

8. An electron in the ground state of the hydrogen atom moves at an average spee

8. An electron in the ground state of the hydrogen atom moves at an average speed of 5x 100 m/s. If the speed is known to an uncertainty of 20%, what is the minimum uncertainty in…

8. An equilibrium mixture contains 1.50 mol of nitrogen, 4.45 mol of hydrogen an

8. An equilibrium mixture contains 1.50 mol of nitrogen, 4.45 mol of hydrogen and 7.05 mol of ammonia in a 5.00 L reaction vessel. Calculate Kc for the Haber-Bosh process. N2(g) +…

8. An unretained solute passes through a chromatography column in 3.7 min and th

8. An unretained solute passes through a chromatography column in 3.7 min and the analyte requires 8.45 min. (a) Find the adjusted retention time and retention factor for the anal…

8. Analytical chem question on sapling correct answer will get rated, thanks! A

8. Analytical chem question on sapling correct answer will get rated, thanks! A sample containing anthracene dissolved in methane was separated using gas chromatography. Methane w…

8. Answer the following questions. (6+3+3 pts) a Acid phosphatase catalyzes hydr

8. Answer the following questions. (6+3+3 pts) a Acid phosphatase catalyzes hydrolysis of 4.0 umol of pNPP in 5 minutes when 2.5 ug of acid phosphatase is present in 5 mL. Calcula…

8. As th e temperature of a gas sample increases, the number of molecules and vo

8. As th e temperature of a gas sample increases, the number of molecules and volume remaining constant, the pressure exerted by the gas A. increases. C. remains the same. 9. As t…

8. Bankcharges Class A bank charges $10 per month plus the following check fees

8. Bankcharges Class A bank charges $10 per month plus the following check fees for a commercial checking account: $.10 each for less than 20 checks $.08 each for 20-39 checks $.0…

8. Based on the balanced equation below: 2 HNO3 1 Sr(OH)2 2 H2O + 1 Sr(NO3)2 + H

8. Based on the balanced equation below: 2 HNO3 1 Sr(OH)2 2 H2O + 1 Sr(NO3)2 + How many mL of water would be formed from 2250mL of 10M strontium hydroxide reacting with excess nit…

8. Calculat e the total vapor pressure of a solution made by dissolving 25.0 g o

8. Calculat e the total vapor pressure of a solution made by dissolving 25.0 g of glucose (CaH0%) in 215 g of water at 50 °C. MMcan2ox-1802 g/mol, MMipo-18.02 g/mol. Vapor Pressur…

8. Calculat e the total vapor pressure of a solution made by dissolving 25.0 g o

8. Calculat e the total vapor pressure of a solution made by dissolving 25.0 g of glucose (CaH0%) in 215 g of water at 50 °C. MMcan2ox-1802 g/mol, MMipo-18.02 g/mol. Vapor Pressur…

8. Calculate the pH of a solution prepared by mixing 0.00255 moles of HCl in 150

8. Calculate the pH of a solution prepared by mixing 0.00255 moles of HCl in 150.0 mL of water. (Report your answer to 2 decimal places) 9. Calculate the pH of a solution prepared…

8. Calculate the standard cell potential for:Ni M. What is the In a certain cell

8. Calculate the standard cell potential for:Ni M. What is the In a certain cell, the concentration of Sn? is 0,0010o M, and the concentration of Ni is 0.10 potential of this cell…

8. Calmodulin is a(n): A) Allosteric activator of calcium-dependent enzymes B) A

8. Calmodulin is a(n): A) Allosteric activator of calcium-dependent enzymes B) Allosteric inhibitor of calcium-dependent enzymes C) Calcium-dependent enzyme D) Cell surface calciu…

8. Calmodulin is a(n): A) Allosteric activator of calcium-dependent enzymes B) A

8. Calmodulin is a(n): A) Allosteric activator of calcium-dependent enzymes B) Allosteric inhibitor of calcium-dependent enzymes C) Calcium-dependent enzyme D) Cell surface calciu…

8. Carbon dioxide gas is one of the products when Tums (active ingredient: calci

8. Carbon dioxide gas is one of the products when Tums (active ingredient: calcium carbonate) reacts with vinegar (acetic acid). The balanced equation is shown below: Caco, (s) + …

8. Carbon dioxide gas is one of the products when Tums (active ingredient: calci

8. Carbon dioxide gas is one of the products when Tums (active ingredient: calcium carbonate) reacts with vinegar (acetic acid). The balanced equation is shown below: Caco, (s) + …

8. Completely soluble nontoxic salts such as Fe,(SO), are often used during wate

8. Completely soluble nontoxic salts such as Fe,(SO), are often used during water purification to remove soluble toxic contaminants, because they form gelatinous hydroxides that e…

8. Consider the apparatus shown below, in which two compartments are initially s

8. Consider the apparatus shown below, in which two compartments are initially separated by a removable partition (shown by the dashed line). One compartment is filled with nitrog…

8. Consider the following Ada Skeletal program: Procedure Main is X: integer; Pr

8. Consider the following Ada Skeletal program: Procedure Main is X: integer; Procedure Sub3; -- This is a declaration of Sub3                                     - -It allows sub…

8. Consider the following balanced reaction. Species Cu Molar Mass 159.61 g/mol

8. Consider the following balanced reaction. Species Cu Molar Mass 159.61 g/mol 56.11 g/mol 97.56 g/mo CuSO4 (aq) + 2 KOH (aq) Cu(OH)2 (s) K2SO4 (aq) KOH Cu(OH a. How many moles o…

8. Consider the following equilibrium: A solution is made by mixing 11.0 mL of 1

8. Consider the following equilibrium: A solution is made by mixing 11.0 mL of 1.10 M CuSO4 and 1.20 L of 0.300 M NH3. Assume additive volumes to answer the following questions. G…

8. Consider the following graph. Which edges, and in which order, are selected b

8. Consider the following graph. Which edges, and in which order, are selected by Prim?s algorithm if it stars at vertex 1? (A) (1,3), (3,7), (2,7), (3,6), (1,4), (3,5) (B) (1,3),…

8. Consider the following hypothetical reaction A titration was performed in whi

8. Consider the following hypothetical reaction A titration was performed in which a standardized solution of A was used as the titrant, and an unknown amount of B was the analyte…

8. Consider the structure of beta-carotene: It is a linear polyene in which 21 b

8. Consider the structure of beta-carotene: It is a linear polyene in which 21 bonds, 10 single and 11 double, alternate along a chain of 22 carbon atoms. Assume that beta-caroten…

8. Describe an electrospray ionization source and the mechanisms involved for th

8. Describe an electrospray ionization source and the mechanisms involved for the generation of gas-phase ions. How does this compare to a DESI source for mass spectrometry? 8. De…

8. Describe the experience Lavoisier performed to disprove the existence of phlo

8. Describe the experience Lavoisier performed to disprove the existence of phlogiston and officially discover oxygen How many elements did Lavoisier identify in his original list…

8. Enter the data you collected in Table 2 here for each of your voltaic cells:

8. Enter the data you collected in Table 2 here for each of your voltaic cells: Cell Copper-Tin sulfate Copper-Aluminum Voltage (in Volts) -0.010 0.20 sulfate Copper-Ferrous sulfa…

8. Enterprising chemical engineering students have set up a still in a bathtub.

8. Enterprising chemical engineering students have set up a still in a bathtub. They can produce 225 bottles of pure alcohol each week. They bottle two products from alcohol: (1) …

8. Fill in the blank for the Krebs cycle, each term is to be used once. The Kreb

8. Fill in the blank for the Krebs cycle, each term is to be used once. The Krebs cycle consists of oxidative phosphorylation. Some of the metabolites of the Krebs cycle are also …