Chemistry concepts and calculations

5. (5 polnts) Below is a set of absorbance data that you have obtained while doi

5. (5 polnts) Below is a set of absorbance data that you have obtained while doing an experiment studying the diffusion of potassium permanganate into solutions of water. This dif…

5. (5.0 points) In which of the following groups can the carbon atom be a chiral

5. (5.0 points) In which of the following groups can the carbon atom be a chiral center? CH2 C. e. The carbon atoms cannot be a chiral center in any of these groups. Answer:- 6. (…

5. (5pnts) Which neutral element is isoelectronic with the chloride ion? 6·Spnts

5. (5pnts) Which neutral element is isoelectronic with the chloride ion? 6·Spnts) Arrange the following elements in order of increasing ionization energy, potassium, cesium, bromi…

5. (6 points) Circle the letters for all the statements which are consistent wit

5. (6 points) Circle the letters for all the statements which are consistent with what is known about membranes. (more than 1 answer is possible) a. Membranes consist of a layer o…

5. (6pts) Refer to the sample data for pre- employment drug screening shown test

5. (6pts) Refer to the sample data for pre- employment drug screening shown test result is a false positive? (False positive means that the device tests positive on a person that …

5. (9 pts.) Calculate the equivalent weight of the following compounds: a) KC; b

5. (9 pts.) Calculate the equivalent weight of the following compounds: a) KC; b) Ca(OH)2; c H3PO 6. (20 pts.) Calculate the # equivalents for the following substances: a) 5 g of …

5. (Super Bonus) Illustrated below is a di-substituted cyclohexane. MAKE the MOD

5. (Super Bonus) Illustrated below is a di-substituted cyclohexane. MAKE the MODEL. Draw three (3) unique depictions of possible conformations employing the boat and chair structu…

5. (a) Based on the reactions listed below, determine delta H for the reaction (

5. (a) Based on the reactions listed below, determine delta H for the reaction (b) Rank the following gas molecules in order of increasing entropy: C3H8, CH4, C6H14. What is the c…

5. (a) Define the term \"specific heat capacity\". 14] (b) In a calorimetry expe

5. (a) Define the term "specific heat capacity". 14] (b) In a calorimetry experiment, a 300 g mass of an unknown material, at a[10] temperature of 220°C, is placed in a copper cal…

5. (a) Describe the two programming loop structures which allow a set of instruc

5. (a) Describe the two programming loop structures which allow a set of instructions in a computer program to be repeated without writing them out again and again. (b) What limit…

5. + -2 points OSColPhys1 24.P034.Tutorial.WA. My Notes The helium-neon lasers m

5. + -2 points OSColPhys1 24.P034.Tutorial.WA. My Notes The helium-neon lasers most commonly used in student physics laboratories have average power outputs of 0.250 mW. (a) If su…

5. -8 points HarrisChem7 18.P.18. My Notes You have been sent to India to invest

5. -8 points HarrisChem7 18.P.18. My Notes You have been sent to India to investigate the occurrence of goiter disease attributed to iodine deficiency. As part of your investigati…

5. 0/10 points | Previous Answers | My Notes ·Ask Your Teacher Find the pH durin

5. 0/10 points | Previous Answers | My Notes ·Ask Your Teacher Find the pH during the titration of 20.00 mL of 0.2650 M butanoic acid, CH3CH2CH2COOH (Ka = 1.54 x 10-5), with 0.265…

5. 1.04 points OSGenChem 1 12 3.P.016 Please use the values in the resources lis

5. 1.04 points OSGenChem 1 12 3.P.016 Please use the values in the resources listed below instead of the textbook vaiues. How will each of the following affect the rate of the rea…

5. 14 points My Notes Ask Your Teacher A 30.5 g sample of an alloy at 93.6°C is

5. 14 points My Notes Ask Your Teacher A 30.5 g sample of an alloy at 93.6°C is placed into 44.7 g water at 23.4°C in an insulated coffee cup. The heat capacity of the coffee cup …

5. A 12 N force with a fixed orientation does work on a particle as the particle

5. A 12 N force with a fixed orientation does work on a particle as the particle moves through the three dimensional displacement d-2 1-41 + 3 (m). What is the angle between the f…

5. A 1200kg car drives up a 20m hill, starting at 8 m/s and reaching the top at

5. A 1200kg car drives up a 20m hill, starting at 8 m/s and reaching the top at 10 m/s. (a) How much work was done by gravity during this trip? (b) Assuming no air resistance, how…

5. A 22.6 mL sample of 0.105 M calcium hydroxide is titrated to the equivalence

5. A 22.6 mL sample of 0.105 M calcium hydroxide is titrated to the equivalence point with 14.25 mL of hydrobromic acid. Calculate the molarity of the hydrobromic acid solution. 6…

5. A 300,000-gallon tank has been storing aqueous radioactive waste since approx

5. A 300,000-gallon tank has been storing aqueous radioactive waste since approximately 1945. The primary radioactive species in this waste is cesium, which is present as both rad…

5. A 300,000-gallon tank has been storing aqueous radioactive waste since approx

5. A 300,000-gallon tank has been storing aqueous radioactive waste since approximately 1945. The primary radioactive species in this waste is cesium, which is present as both rad…

5. A 5.0 mL volume of 0.002M SCN- is mixed with 5.0 mL of 0.02M Fe 3+ to form th

5. A 5.0 mL volume of 0.002M SCN- is mixed with 5.0 mL of 0.02M Fe 3+ to form the blood-red complex FeNCS 2+. The equilibrium molar concentration of the FeNCS 2+ determined from a…

5. A CHEM 1792 student prepares a dilute solution of sodium hydroxide, NaOH (aq)

5. A CHEM 1792 student prepares a dilute solution of sodium hydroxide, NaOH (aq), starting with 6 M sodium hydroxide. She then titrates a 1.372 g sample of KHP with the dilute sod…

5. A CHM 126 student examined how stressing a second equilibrium can affect equi

5. A CHM 126 student examined how stressing a second equilibrium can affect equilibrium. Into a clean test tube the student placed about 2 mL of 0.5 M K CrOs solution. The student…

5. A battery is attached across several capacitors connected in series. Which of

5. A battery is attached across several capacitors connected in series. Which of the following statements are true? a) All the capacitors have the same charge, and the equivalent …

5. A bicyclic alkane contaimsi2carbon atoms. How many hydrogen atoms does it con

5. A bicyclic alkane contaimsi2carbon atoms. How many hydrogen atoms does it contain2 A. 20 8. 22 c. 24 D. 26 E 28 6A branched alkane has boing point relative to the isomeric line…

5. A calibration curve for the colormetric determination of phosphorus in urine

5. A calibration curve for the colormetric determination of phosphorus in urine is prepared by reacting standard solutions of phosphate with molybdenum (V) and reducing the phosph…

5. A calibration curve for the colormetric determination of phosphorus in urine

5. A calibration curve for the colormetric determination of phosphorus in urine is prepared by reacting standard solutions of phosphate with molybdenum (V) and reducing the phosph…

5. A carries out a experiment using HCI NaoH. What effect will each of the follo

5. A carries out a experiment using HCI NaoH. What effect will each of the following have on the calculated enthalpy of the reaction relative actual enthalpy of to the reaction? (…

5. A chemist mixes 5.216 g of potassium permanganate, 2.318 g of ethanol, and ex

5. A chemist mixes 5.216 g of potassium permanganate, 2.318 g of ethanol, and excess sulfuric acid. These chemicals react as follows: Please repor rt all of your answers for this …

5. A chemist mixes 5.216 g of potassium permanganate, 2.318 g of ethanol, and ex

5. A chemist mixes 5.216 g of potassium permanganate, 2.318 g of ethanol, and excess sulfuric acid. These chemicals react as follows: Please repor rt all of your answers for this …

5. A cold-worked brass specimen of average grain size 0.008 mm has a yield stren

5. A cold-worked brass specimen of average grain size 0.008 mm has a yield strength of 160 MPa (23,500 psi). Estimate the yield strength of this alloy after it has been heated to …

5. A color change reaction goes from red to clear as the reaction goes to comple

5. A color change reaction goes from red to clear as the reaction goes to completion. If the reaction is observed to be very pale pink after 200 seconds, which of the following co…

5. A compound contains 40.0% C, 6.71% H, and 53.29% O by mass. The molecular wei

5. A compound contains 40.0% C, 6.71% H, and 53.29% O by mass. The molecular weight of the compound is 60.05 amu. The molecular formula of this compound is- A) C2H402 B) CH20 C) C…

5. A dielectric-filled parallel-plate capacitor has plate area A = 20.0 cm2 , pl

5. A dielectric-filled parallel-plate capacitor has plate area A = 20.0 cm2 , plate separation d = 10.0 mm and dielectric constant k = 5.00. The capacitor is connected to a batter…

5. A first-order reaction has a rate constant of 3.00 x 103s. The time required

5. A first-order reaction has a rate constant of 3.00 x 103s. The time required for the reaction to D) 201 s 6. At 25°C the rate constant for the first-order decomposition of a pe…

5. A gas cylinder with a movable piston holds 150 mL of a sample of an ideal gas

5. A gas cylinder with a movable piston holds 150 mL of a sample of an ideal gas sample at 1 atm and 295.15 K. Calculate the effect that the following changes in volume, temperatu…

5. A manufacturer claims that its new dietetic dessert has \"fewer than 10 Calor

5. A manufacturer claims that its new dietetic dessert has "fewer than 10 Calories per serving." To test the claim, a chemist at the Department of Consumer Affairs places one serv…

5. A mass mm on a horizontal surface is attached to a massless, ideal spring (sp

5. A mass mm on a horizontal surface is attached to a massless, ideal spring (spring constant k) First, assume a frictionless surface: a. (2 pts.) If the mass is given an initial …

5. A mixture of 2.00 g of fluorine gas and 2.00 g of nitrogen gas is placed in a

5. A mixture of 2.00 g of fluorine gas and 2.00 g of nitrogen gas is placed in a 15.0 L vessel at 50 °C. What is the partial pressure of each gas and what is the total pressure of…

5. A number of agents have been demonstrated to cause protein hydrolysis or prot

5. A number of agents have been demonstrated to cause protein hydrolysis or protein denaturation. Match the reagent or condition with the type of noncovalent interactions it would…

5. A particle in a box model can be applied in a simplistic manner to the consid

5. A particle in a box model can be applied in a simplistic manner to the consideration of mobile electrons in a conjugated system. Consider vitamin A2 depicted below with 12 elec…

5. A particle in a box model can be applied in a simplistic manner to the consid

5. A particle in a box model can be applied in a simplistic manner to the consideration of mobile electrons in a conjugated system. Consider vitamin A2 depicted below with 12 elec…

5. A possible mechanism for the overall reaction is found below: Br2 (g) + 2 NO

5. A possible mechanism for the overall reaction is found below: Br2 (g) + 2 NO (g) 2 NOBr (g) Step 1 (fast) NO (g) + Br2 (g) NOBr2 (g) Step 2 (slow) NOBr2 (g) + NO (g) 2 NOBr (g)…

5. A rigid and sealed eylinder contains 0.250 mol of eliuam gas, 0,500 mol of ne

5. A rigid and sealed eylinder contains 0.250 mol of eliuam gas, 0,500 mol of neon gas, and 0.150 mol of nitrogen gas. The total pressure inside the cylinder is 9.0 atm. Helium ha…

5. A simple Atwood machine consists of two masses m 1 and m 2 that are connected

5. A simple Atwood machine consists of two masses m1 and m2 that are connected by a string wound over a pulley, as seen in the figure below. Assume m2 is larger than m1. Motion in…

5. A sinker made of 316 Stoinless Steel with an exact volume of 10.00mL has a ma

5. A sinker made of 316 Stoinless Steel with an exact volume of 10.00mL has a mass of 79.900g in air. The sinker is suspended in a liquid sports drink that contains approximately …

5. A sinker made of 316 Stoinless Steel with an exact volume of 10.00mL has a ma

5. A sinker made of 316 Stoinless Steel with an exact volume of 10.00mL has a mass of 79.900g in air. The sinker is suspended in a liquid sports drink that contains approximately …

5. A stock solution of red dye (molar mass 496.42 g/mol) is made by dissolving 0

5. A stock solution of red dye (molar mass 496.42 g/mol) is made by dissolving 0.1049 g of red dye into a 50-mL volumetric flask and diluting the flask to the mark with distilled …

5. A student following a similar procedure r student, in order to separate calci

5. A student following a similar procedure r student, in order to separate calcium chl ecovered a total of 0.78a sodium chloride and 1.09 g silicon dioxide. The carbonate from sil…

5. A student used the method of standard additions (volume of the diluted unknow

5. A student used the method of standard additions (volume of the diluted unknown was 10.0 mL) and fluorescence spectroscopy to measure the amount of quinine (CH2aN,02, MW 324.43 …