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Please answer all of these questions
Homework Answers
A) weak electrolyte dissociate partially into their aqueous solution. strong electrolyte fully dissociate into their constituent ions in their aqueous solution.
Eg: NaCl, KCl : strong electrolyte
CH3COOH, HCN : weak electrolyte
D) a buffer is a solution which resists any change in pH when small amount of acid or base is added.
Eg: aceticacid-acetate buffer pH=4.75
Ammonical buffer NH3 + NH4Cl : pH= 9-10
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Please answer all of these questions
[TURN OVERI 5 PCH241P OCT/NOV 2018 Question 4 (a) Differentiate...
OCT / NOV 2017 Question 4 (a) Deline what is meant by a weak electrolyte and...
OCT / NOV 2017 Question 4 (a) Deline what is meant by a weak electrolyte and a strong electrolyte by providing an example of each b) Calculate the pH of 0 100 cm2 of a o 85 mol dma soluon of HCI (u) 200 cm3 of a 0 15 mol dm 3 solution of sodium hydroxide (m) A mixture of the above two solutions c) Write the expression for the solublity product constant (Ksp) for a hypothetical species A2Bisi (d)...
PCT3601 OCT/NOV 2018 QUESTION 1 Your company is designing a plant to produce biodiesel Several of...
PCT3601 OCT/NOV 2018 QUESTION 1 Your company is designing a plant to produce biodiesel Several of the unit processos require heated water that is under tight temperature control The desired temperature of the water is 65°C: 1'C To accomplish this, steam will be used in a shell and tube heat exchanger to heat the incoming water A member on the project team suggests the following feed forward control system to regulate the temperature of the water stream Temperature and flow...
3 MEE231V OCT/NOV 2018 Question 3 Figure 2 shows a brake drum that is rotating anticlockwise...
3 MEE231V OCT/NOV 2018 Question 3 Figure 2 shows a brake drum that is rotating anticlockwise The brake arm ABF pivots at B and the braking force of 40 N is applied at F The drum has a diameter of 900 mm and rotates at 300 rev/min The coefficient of friction between the brake drum and the brake band is 0,35 180 mm 780 mm A B 60° 604 Figure 2 Calculate 31 The length of the arc of contact...
Please help me here PHY3703 Oct/Nov 2018 4 The spin-spin correlation function for the one-dimensional Ising...
Please help me here
PHY3703 Oct/Nov 2018 4 The spin-spin correlation function for the one-dimensional Ising model is defined as G (r) 3Sr-3S where r s the separation between the two spins in unuts of the lattice constant, and the averages are to be taken over all microstates Consider an Ising chain of N=3 spins with free boundary conditions in equlibrium with a heat bath at temperature T and in zero magnetic field (a) Enumerate all the microsates of this...
Can all questions be answered please 39-49 39. The vapor pressure of pure water at 25...
Can all questions be answered please 39-49
39. The vapor pressure of pure water at 25 °C is 23.8 torr. What is the vapor pressure (torr) of water above a solution prepared by dissolving 18.0 g of glucose (a nonelectrolyte, MW- 180.0 g mol) in 95.0 g of water? A) 24.3 B)234 C0451 D) 0.443 E) 23.8 40. What is the freezing point (C) of a solution prepared by dissolving 11.3 g of(formula weight 164 g/mol) in 115 g of...
Can you please answer all my questions please. I really need the answers to all the...
Can you please answer all my questions please. I
really need the answers to all the questions please
ORC221F/101/3/2019 48. Which of the following statements about benzene is INCORRECT? (1) All twelve atoms do not lie in the same plane (2) All the carbon atoms are sp2 hybridized (3) The C-H bonds are all the same length (4) The electrophilic aromatic substitution reaction is a common reaction type 49. Name the following compound according to the IUPAC nomenclature. (1) N-ethyl-2-bromo-2-methyl-2-pentanamine...
all questions D Question 4 10 pts A car makes a turn at a constant speed...
all questions
D Question 4 10 pts A car makes a turn at a constant speed 6.3 m/s. The magnitude of he car's acceleration durig the turm is 1 77 m/s. Whatis the radius of the turn in meterst Question 5 A car goes around a turn. At the point shown, it is slowing down at a rate of 0.75 m/s2 and the magnitude of the centripetal acceleration is 1.5 m/s? Which diagram best represents the acceleration? Select ] What...
Please answer all multiple choice All questions need to be answered! Questions 1-20 are multiple choice...
Please answer all multiple choice
All
questions need to be answered!
Questions 1-20 are multiple choice questions. Please mark the correct circle on the Scantron form. Only the Scantron form will be graded. Scantron must be filled in before time is called Which of the following acids is not a strong acid? 5 HI b. HBr to SEHNO, HF HESO. Venter 2. Which of the following is an example of an empirical formula: a Cs Ho HO LP Fea(SO) d)...
All parts of one question. please help The common laboratory solvent water is often used to...
All parts of one question. please help
The common laboratory solvent water is often used to purify substances dissolved in it. The vapor pressure of water is 23.76 mm Hg at 25 °C. In a laboratory experiment, students synthesized a new compound and found that when 79.28 grams of the compound were dissolved in 211.4 grams of water, the vapor pressure of the solution was 23.30 mm Hg. The compound was also found to be nonvolatile and a non-electrolyte. What...
please answers all these questions : QUESTION 5 NaOH(s)---> Na^+(aq)+CH^-(aq)+44.02kJ Calculate the amount (in moles) of...
please answers all these questions : QUESTION 5 NaOH(s)---> Na^+(aq)+CH^-(aq)+44.02kJ Calculate the amount (in moles) of NaOH needed to make the reaction above releases 1000 kJ 22.71 mol 0.04402 mol 44020 mol 44.02 mol ______________ QUESTION 6 Use the equation below to find heat released if 2 moles of NaOH was dissolved in water. NaOH(s)---> Na^+(aq)+CH^-(aq)+44.02kJ A-44.02 kJ B-2.00 KJ C-88.02 KJ D-22.01 KJ --------- Question 7 In a neutralization reaction, NaOH(ag) reacted with HCl(ag) at 21.019C to produce 80g...
OCT / NOV 2017 Question 4 (a) Deline what is meant by a weak electrolyte and a strong electrolyte by providing an example of each b) Calculate the pH of 0 100 cm2 of a o 85 mol dma soluon of HCI (u) 200 cm3 of a 0 15 mol dm 3 solution of sodium hydroxide (m) A mixture of the above two solutions c) Write the expression for the solublity product constant (Ksp) for a hypothetical species A2Bisi (d)...
PCT3601 OCT/NOV 2018 QUESTION 1 Your company is designing a plant to produce biodiesel Several of the unit processos require heated water that is under tight temperature control The desired temperature of the water is 65°C: 1'C To accomplish this, steam will be used in a shell and tube heat exchanger to heat the incoming water A member on the project team suggests the following feed forward control system to regulate the temperature of the water stream Temperature and flow...
3 MEE231V OCT/NOV 2018 Question 3 Figure 2 shows a brake drum that is rotating anticlockwise The brake arm ABF pivots at B and the braking force of 40 N is applied at F The drum has a diameter of 900 mm and rotates at 300 rev/min The coefficient of friction between the brake drum and the brake band is 0,35 180 mm 780 mm A B 60° 604 Figure 2 Calculate 31 The length of the arc of contact...
Please help me here
PHY3703 Oct/Nov 2018 4 The spin-spin correlation function for the one-dimensional Ising model is defined as G (r) 3Sr-3S where r s the separation between the two spins in unuts of the lattice constant, and the averages are to be taken over all microstates Consider an Ising chain of N=3 spins with free boundary conditions in equlibrium with a heat bath at temperature T and in zero magnetic field (a) Enumerate all the microsates of this...
Can all questions be answered please 39-49
39. The vapor pressure of pure water at 25 °C is 23.8 torr. What is the vapor pressure (torr) of water above a solution prepared by dissolving 18.0 g of glucose (a nonelectrolyte, MW- 180.0 g mol) in 95.0 g of water? A) 24.3 B)234 C0451 D) 0.443 E) 23.8 40. What is the freezing point (C) of a solution prepared by dissolving 11.3 g of(formula weight 164 g/mol) in 115 g of...
Can you please answer all my questions please. I
really need the answers to all the questions please
ORC221F/101/3/2019 48. Which of the following statements about benzene is INCORRECT? (1) All twelve atoms do not lie in the same plane (2) All the carbon atoms are sp2 hybridized (3) The C-H bonds are all the same length (4) The electrophilic aromatic substitution reaction is a common reaction type 49. Name the following compound according to the IUPAC nomenclature. (1) N-ethyl-2-bromo-2-methyl-2-pentanamine...
all questions
D Question 4 10 pts A car makes a turn at a constant speed 6.3 m/s. The magnitude of he car's acceleration durig the turm is 1 77 m/s. Whatis the radius of the turn in meterst Question 5 A car goes around a turn. At the point shown, it is slowing down at a rate of 0.75 m/s2 and the magnitude of the centripetal acceleration is 1.5 m/s? Which diagram best represents the acceleration? Select ] What...
Please answer all multiple choice
All
questions need to be answered!
Questions 1-20 are multiple choice questions. Please mark the correct circle on the Scantron form. Only the Scantron form will be graded. Scantron must be filled in before time is called Which of the following acids is not a strong acid? 5 HI b. HBr to SEHNO, HF HESO. Venter 2. Which of the following is an example of an empirical formula: a Cs Ho HO LP Fea(SO) d)...
All parts of one question. please help
The common laboratory solvent water is often used to purify substances dissolved in it. The vapor pressure of water is 23.76 mm Hg at 25 °C. In a laboratory experiment, students synthesized a new compound and found that when 79.28 grams of the compound were dissolved in 211.4 grams of water, the vapor pressure of the solution was 23.30 mm Hg. The compound was also found to be nonvolatile and a non-electrolyte. What...
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