The average diameter of calcium carbonate in an aqueous suspension is 54 μm. The density of...
The average diameter of calcium carbonate in an aqueous suspension is 54 μm. The density of CaCO3 and water, respectively, are 2.7 and 0.997 g/cm3. The viscosity of water is 1 cps at 20°C. The sedimentation rate for CaCO3 powder in this suspension is _____cm/sec.
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The average diameter of calcium carbonate in an aqueous
suspension is 54 μm. The density of...
Crystals of calcium carbonate are being deposited on a fiber that is suspended in a suspension...
Crystals of calcium carbonate are being deposited on a fiber that is suspended in a suspension of bulk concentration of 50 g/L. The flow velocity is 0.01 m/s and the fiber has a diameter of 1 mm. If the crystal diffusivity in water is given as 1.5e-12 m2/s. The solutions are aqueous. The length of the fiber is 5 mm. Determine the deposition rate of the crystals to the fiber surface.
only need c/d/e F. (20 points) 109.3 g of calcium carbonate (CaCO3) reacts with 82.1 g...
only need c/d/e
F. (20 points) 109.3 g of calcium carbonate (CaCO3) reacts with 82.1 g of phosphoric acid (H,PO,) in aqueous solution to form carbon dioxide, water, and calcium phosphate (Ca,(PO)2). The reaction goes to completion. The atomic masses of calcium, phosphorus, oxygen, and carbon are 40.1, 31.0, 16, and 12, respectively. Answer the following questions regarding this reaction. (a) Write the balanced chemical equation for this reaction. (b) What is the molecular weight of phosphoric acid? (e) How...
An aqueous suspension containing 7% insoluble solids is filtered, at a rate of 10 ton /...
An aqueous suspension containing 7% insoluble solids is filtered, at a rate of 10 ton / h, using a frame and plate filter press, which works at a constant pressure of 3 atm. Experimentally it has been found that the deposited cake has 50% humidity, the density of the dry solid being 3.5 g / cm3, and the equivalent diameter of the deposited particles 0.002 mm. It neglects the resistance that the filter medium offers to the filtration and calculates...
A ping-pong ball has an average density of 0.140 g/cm3 and a diameter of 3.80 cm....
A ping-pong ball has an average density of 0.140 g/cm3 and a diameter of 3.80 cm. What force would be required to keep the ball completely submerged under water? Assume the ball is spherical. a. 0.484N b. 0.242N c. 0.516N d. 0.258N please show the formulas used
Problem 5.28. Calcium carbonate, CaCO3, has two common crystae forms, calcite and aragonite. Thermodynamic data for these phases can be found at the back of this book (a) Which is stable at earth...
Problem 5.28. Calcium carbonate, CaCO3, has two common crystae forms, calcite and aragonite. Thermodynamic data for these phases can be found at the back of this book (a) Which is stable at earth's surface, calcite or aragonite? (b) Calculate the pressure (still at room temperature) at which the other phase should become stable. All of the values in this table are for one mole of material at 298 K and 1 bar. Following the chemical formula is the form of...
CENTRE INDEX NUMBER SECTION B 30 marks] Calculate the discharge through a pipe of diameter 200...
CENTRE INDEX NUMBER SECTION B 30 marks] Calculate the discharge through a pipe of diameter 200 mm when the difference of pressure head between the ends of the pipe 500 m apart is 4 m of water. Take the value off= 0.009 in the formula hl= a) 19.5e/s b)2.0es e)03 m's d) 29.3 e/s 2. A scale 1:50 scale model of ship is towed through sea water at a speed of 1 ms. A force of 2 N is required...
A group of researchers have been trying to generate a degradable scaffold made of polycaprolactone (PCL)...
A group of researchers have been trying to generate a degradable scaffold made of polycaprolactone (PCL) for non-load bearing bone substitute. A literature survey indicates that the scaffold for bone tissue engineering should ideally be at least 80% porous with an average pore diameter of 150-220 μm. 4. (a)Discuss the importance of porosity and pore size in tissue engineering scaffolds. (5 marks) (b) The group finally developed a cylindrical scaffold (12 mm in diameter and 10 mm in height) with...
Homework 5-Feb 28.docx Please prepare your homework answers either in WORD file or on an engineering...
Homework 5-Feb 28.docx Please prepare your homework answers either in WORD file or on an engineering paper by handwriting. If you use a handwriting form, please scan the paper neatly and upload a PDF or word version to Canvas and HAND in your original hard copy to me before the class if possible. NOTE: This homework contains a submission of an excel file in addition to your WORD or PDF file Again, no late homework is accepted. No exceptions. Size...
What are the instruments that have been utilized for the review article discussions? ` 1. Introduction...
What are the instruments that have been utilized for the
review article discussions?
`
1. Introduction In recent years, nanoclays have been the object of particular interest for many scientists and researchers in chemistry, physics, engineering and biology due to their excellent properties as well as their sustain- ability [1-3]. For instance, they represent the starting point to the de velopment of smart materials for drug delivery (4-9), food packaging [10-12), environmental remediation and wastewater treatment [13], cultural heritage [14–17and...
reply ma as soon as possible 120 points total Due: October 23, 2019 Budget your time...
reply ma as soon as possible
120 points total Due: October 23, 2019 Budget your time carefully TRUE OR FALSE (45 points - 3 points cach): Mark whether the statements as written are "true" or "false". If the statement is false, make minor changes to the statement so that the statement is true. The primary adverse health effect resulting from the disposal of mercury wastes into Minamata Bay was dysentery The flow regime in horizontal velocity grit chambers approaches continuous...
only need c/d/e
F. (20 points) 109.3 g of calcium carbonate (CaCO3) reacts with 82.1 g of phosphoric acid (H,PO,) in aqueous solution to form carbon dioxide, water, and calcium phosphate (Ca,(PO)2). The reaction goes to completion. The atomic masses of calcium, phosphorus, oxygen, and carbon are 40.1, 31.0, 16, and 12, respectively. Answer the following questions regarding this reaction. (a) Write the balanced chemical equation for this reaction. (b) What is the molecular weight of phosphoric acid? (e) How...
Problem 5.28. Calcium carbonate, CaCO3, has two common crystae forms, calcite and aragonite. Thermodynamic data for these phases can be found at the back of this book (a) Which is stable at earth's surface, calcite or aragonite? (b) Calculate the pressure (still at room temperature) at which the other phase should become stable. All of the values in this table are for one mole of material at 298 K and 1 bar. Following the chemical formula is the form of...
CENTRE INDEX NUMBER SECTION B 30 marks] Calculate the discharge through a pipe of diameter 200 mm when the difference of pressure head between the ends of the pipe 500 m apart is 4 m of water. Take the value off= 0.009 in the formula hl= a) 19.5e/s b)2.0es e)03 m's d) 29.3 e/s 2. A scale 1:50 scale model of ship is towed through sea water at a speed of 1 ms. A force of 2 N is required...
A group of researchers have been trying to generate a degradable scaffold made of polycaprolactone (PCL) for non-load bearing bone substitute. A literature survey indicates that the scaffold for bone tissue engineering should ideally be at least 80% porous with an average pore diameter of 150-220 μm. 4. (a)Discuss the importance of porosity and pore size in tissue engineering scaffolds. (5 marks) (b) The group finally developed a cylindrical scaffold (12 mm in diameter and 10 mm in height) with...
Homework 5-Feb 28.docx Please prepare your homework answers either in WORD file or on an engineering paper by handwriting. If you use a handwriting form, please scan the paper neatly and upload a PDF or word version to Canvas and HAND in your original hard copy to me before the class if possible. NOTE: This homework contains a submission of an excel file in addition to your WORD or PDF file Again, no late homework is accepted. No exceptions. Size...
What are the instruments that have been utilized for the
review article discussions?
`
1. Introduction In recent years, nanoclays have been the object of particular interest for many scientists and researchers in chemistry, physics, engineering and biology due to their excellent properties as well as their sustain- ability [1-3]. For instance, they represent the starting point to the de velopment of smart materials for drug delivery (4-9), food packaging [10-12), environmental remediation and wastewater treatment [13], cultural heritage [14–17and...
reply ma as soon as possible
120 points total Due: October 23, 2019 Budget your time carefully TRUE OR FALSE (45 points - 3 points cach): Mark whether the statements as written are "true" or "false". If the statement is false, make minor changes to the statement so that the statement is true. The primary adverse health effect resulting from the disposal of mercury wastes into Minamata Bay was dysentery The flow regime in horizontal velocity grit chambers approaches continuous...
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