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om op 10.02leic acid boleton? • O time Timer Notes notes volume Evaluate Course Contents ......
14. The unknown tablet is prepared for analysis in two steps. The tablet is crushed into...
14. The unknown tablet is prepared for analysis in two steps. The tablet is crushed into a powder and then dissolved into a 250 ml volumetric flask with dilute acetic acid. A duted powder solution is prepared by transferring 25.00 mL of the original powder solution into a so me volumetric ask and duting to volume with dute acetic acid Then 1.00 mL of the diluted powder solution is added to each of the standard addition flasks each flask has...
15. The riboflavin concentration in the unknown powder solution is 63.7 ppm. The total volume of...
15. The riboflavin concentration in the unknown powder solution is 63.7 ppm. The total volume of the powder solution is 250.00 ml. What is the concentration in the tablet (mg ribo/tablet) if the mass of tablet = 0.6210 g and the mass of powder - 0.5699 g? O 17.4 22.5 O 17.35 Submit Answer Incorrect. Tries 1/2 Previous Tries Send Feedback This discussion is closed.
Tablet Information(75 Tablets -each tablet contains 5.1mg riboflavin ), concentration of riboflavin in unknown powder solution:...
Tablet Information(75 Tablets
-each tablet contains 5.1mg riboflavin ), concentration of
riboflavin in unknown powder solution: 1.01±0.04ppm. Find the
Report the mass of riboflavin in your tablet.
3. Preparation of standard addition solutions. Prepare six 25 mL volumetric flasks as follows: Volume of tablet solution (mL) 2.00 2.00 2.00 2.00 2.00 2.00 Volume of standard riboflavin solution (mL) 0 1.00 2.50 7.50 12.50 20.00 Top each flask to the mark Measure the volume of standard riboflavin solution using a burette....
Course Contents >> ... >> Problemas III >> 20.38 - Resistance and Resistivity Timer Notes Evaluate...
Course Contents >> ... >> Problemas III >> 20.38 - Resistance and Resistivity Timer Notes Evaluate Feedback Print A tungsten filament has a resistance of 0.370 at room temperature (20.0°C). What is the resistance of the filament when the temperature is increased to a typical operating temperature of 2820°C when the thermal expansion of the tungsten filament is taken into account? The thermal expansion coefficient of tungsten is 1.20x10-5/°C. 0.3824ohm Submit Answer Incorrect. Tries 1/3 Previous Tries By what percentage...
Timer Notes Evaluate Feedback Print Inf Course Contents >> ... >> Given: Ksp(Ag Croa) = 41.2x10-12...
Timer Notes Evaluate Feedback Print Inf Course Contents >> ... >> Given: Ksp(Ag Croa) = 41.2x10-12 Ksp(Bacroa) = 2.1x10-10 For a solution which is initially 0.005 M in Ba2+ and 0.005 M in Ag+, it is desired to precipitate one of these ions as its chromate (Cro42-) salt to the maximum possible degree without precipitating any of the other cation. From this solution, which ion can be selectively first-precipitated by controlled addition of CrO42- and, ideally, what is the maximum...
Main Menu Contents Grades Course Contents » Timer Notes Evaluate Feedback P Consider the f(x) =...
Main Menu Contents Grades Course Contents » Timer Notes Evaluate Feedback P Consider the f(x) = cos(Bx) function shown in the figure in blue color. What is the value of parameter B for this function? This parameter is called angular frequency in physics and it is denoted by w -7 6 5 4 -3 -2 -1 0 1 2 3 4 5 6 7 As a reference the g(x) = cos(x) function is shown in red color, and green tick...
[ Course Contents » Correction Exams » < Timer Notes Evaluate Feedback 9 Print In a...
[ Course Contents » Correction Exams » < Timer Notes Evaluate Feedback 9 Print In a double-slit experiment, the fifth- order bright fringe is observed at an angle of 1.64°. If the slit separation is 0.12 mm, then what is the wavelength of the light? (1.72x10^-6m Submit Answer Incorrect. Trie /20 Previou Tries @ Post Discussion 13 Send Feedback
Course Contents> ... Expt 10 Calcium in Milk using an Ion Selective Electrode » 09.problem 9....
Course Contents> ... Expt 10 Calcium in Milk using an Ion Selective Electrode » 09.problem 9. What is the antilog (base 10) of [(-46.4-45.96) + (26.19)]? Report the answer using the correct number of significant figures. O 1.3 O 0.00030 0.0002974 O 1.260 Submit Answer Incorrect. Tries 1/2 Previous Tries This discussion is closed.
Prelab Questions 1. a. (10) Determine the a) mass of the solute and b) volume of conc. HCl you are going to a) wei...
Prelab Questions 1. a. (10) Determine the a) mass of the solute and b) volume of conc. HCl you are going to a) weigh out and b) measure with a graduated cylinder to create 1L of 100.0 ppm stock solution of Acetylsalicylic acid (ASA) (from the pure powder) in a 2%(W/V) HCI. Show your calculation. C at:.. HALI Procedure - External Standards 1. First make 2% V/v HCI. You will make this three times. Transfer to two plastic containers (use...
• Timer Notes Evaluate Feedback Print Course Contents >> Online Lectures ... >> Chapter 22 ......
• Timer Notes Evaluate Feedback Print Course Contents >> Online Lectures ... >> Chapter 22 ... » Bonus Question : Diffraction Grating ... Which one of the following actions would make the maxima in the interference pattern from a grating move further apart? O Decreasing the wavelength of the laser. O Decreasing the number of lines per length. O Increasing the distance to the screen. O Decreasing the distance to the screen. Submit Answer Tries 0/2 This discussion is closed....
14. The unknown tablet is prepared for analysis in two steps. The tablet is crushed into a powder and then dissolved into a 250 ml volumetric flask with dilute acetic acid. A duted powder solution is prepared by transferring 25.00 mL of the original powder solution into a so me volumetric ask and duting to volume with dute acetic acid Then 1.00 mL of the diluted powder solution is added to each of the standard addition flasks each flask has...
15. The riboflavin concentration in the unknown powder solution is 63.7 ppm. The total volume of the powder solution is 250.00 ml. What is the concentration in the tablet (mg ribo/tablet) if the mass of tablet = 0.6210 g and the mass of powder - 0.5699 g? O 17.4 22.5 O 17.35 Submit Answer Incorrect. Tries 1/2 Previous Tries Send Feedback This discussion is closed.
Tablet Information(75 Tablets
-each tablet contains 5.1mg riboflavin ), concentration of
riboflavin in unknown powder solution: 1.01±0.04ppm. Find the
Report the mass of riboflavin in your tablet.
3. Preparation of standard addition solutions. Prepare six 25 mL volumetric flasks as follows: Volume of tablet solution (mL) 2.00 2.00 2.00 2.00 2.00 2.00 Volume of standard riboflavin solution (mL) 0 1.00 2.50 7.50 12.50 20.00 Top each flask to the mark Measure the volume of standard riboflavin solution using a burette....
Course Contents >> ... >> Problemas III >> 20.38 - Resistance and Resistivity Timer Notes Evaluate Feedback Print A tungsten filament has a resistance of 0.370 at room temperature (20.0°C). What is the resistance of the filament when the temperature is increased to a typical operating temperature of 2820°C when the thermal expansion of the tungsten filament is taken into account? The thermal expansion coefficient of tungsten is 1.20x10-5/°C. 0.3824ohm Submit Answer Incorrect. Tries 1/3 Previous Tries By what percentage...
Timer Notes Evaluate Feedback Print Inf Course Contents >> ... >> Given: Ksp(Ag Croa) = 41.2x10-12 Ksp(Bacroa) = 2.1x10-10 For a solution which is initially 0.005 M in Ba2+ and 0.005 M in Ag+, it is desired to precipitate one of these ions as its chromate (Cro42-) salt to the maximum possible degree without precipitating any of the other cation. From this solution, which ion can be selectively first-precipitated by controlled addition of CrO42- and, ideally, what is the maximum...
Main Menu Contents Grades Course Contents » Timer Notes Evaluate Feedback P Consider the f(x) = cos(Bx) function shown in the figure in blue color. What is the value of parameter B for this function? This parameter is called angular frequency in physics and it is denoted by w -7 6 5 4 -3 -2 -1 0 1 2 3 4 5 6 7 As a reference the g(x) = cos(x) function is shown in red color, and green tick...
[ Course Contents » Correction Exams » < Timer Notes Evaluate Feedback 9 Print In a double-slit experiment, the fifth- order bright fringe is observed at an angle of 1.64°. If the slit separation is 0.12 mm, then what is the wavelength of the light? (1.72x10^-6m Submit Answer Incorrect. Trie /20 Previou Tries @ Post Discussion 13 Send Feedback
Course Contents> ... Expt 10 Calcium in Milk using an Ion Selective Electrode » 09.problem 9. What is the antilog (base 10) of [(-46.4-45.96) + (26.19)]? Report the answer using the correct number of significant figures. O 1.3 O 0.00030 0.0002974 O 1.260 Submit Answer Incorrect. Tries 1/2 Previous Tries This discussion is closed.
Prelab Questions 1. a. (10) Determine the a) mass of the solute and b) volume of conc. HCl you are going to a) weigh out and b) measure with a graduated cylinder to create 1L of 100.0 ppm stock solution of Acetylsalicylic acid (ASA) (from the pure powder) in a 2%(W/V) HCI. Show your calculation. C at:.. HALI Procedure - External Standards 1. First make 2% V/v HCI. You will make this three times. Transfer to two plastic containers (use...
• Timer Notes Evaluate Feedback Print Course Contents >> Online Lectures ... >> Chapter 22 ... » Bonus Question : Diffraction Grating ... Which one of the following actions would make the maxima in the interference pattern from a grating move further apart? O Decreasing the wavelength of the laser. O Decreasing the number of lines per length. O Increasing the distance to the screen. O Decreasing the distance to the screen. Submit Answer Tries 0/2 This discussion is closed....
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