When use HPLC and Ultraviolet Spectroscopy to measure the concentration of caffeine in beverage, the results...
When use HPLC and Ultraviolet Spectroscopy to measure the concentration of caffeine in beverage, the results by HPLC is 17.61 mg/7.5 fl oz while the results by Ultraviolet Spectroscopy is 28.84mg/ fl oz. Why there is a huge difference between these two values?
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When use HPLC and Ultraviolet Spectroscopy to measure the
concentration of caffeine in beverage, the results...
In a laboratory setting, one way to ensure accuracy is to use repeated measurements when conducting...
In a laboratory setting, one way to ensure accuracy is to use repeated measurements when conducting an experiment. Suppose that a lab assistant was given 10 experiments to conduct. After each experiment, she had to measure the weight of the result on two different scales, scale A and scale B. The mean difference of the weights of the 10 experimental results was 1.87 grams with a standard deviation of 1.33 grams (scale A – scale B). It is suspected that...
CHEMICAL BO NDING and PROPERTIES of COMPOUNDs Use theory portion of this lab, and information from...
CHEMICAL BO NDING and PROPERTIES of COMPOUNDs Use theory portion of this lab, and information from chapters 4 and 5 to to mplete this PreLab Fill in the blanks: MOLNCULARSA 1. a. The measure of an atom's attraction for the electrons in a bond is its uEne m trvs ewperivne bonding involves a transfer of electrons between two atoms c. Sharing of electrons in a bond between two atoms is... bondig d. A pure covalent or non-polar covalent bond exists...
STUDENT INFO Name: Date: Course/Section: Results EXPERIMENT3 Electrolytes and conductivity Results Units Conduct...
STUDENT INFO Name: Date: Course/Section: Results EXPERIMENT3 Electrolytes and conductivity Results Units Conductivity Concentration (M) Solution 0.O43 Distilled water L02 7 C Tap water CaH,OH 5219 НC 19.13 Cm OSOM НС 35.90 0.020M 0,02- На 0.0SS GloM HNO KOH Glor KCI MS 2002 0.loM KNO 5.952 O.10M Ca(NOsl NHS em 1335 HОН0, UT Units Conductivity Mixture Concentration (MX OIOM 21.69 нс HC-KNO OLon KNO 0,10M Hо-но .907 6.01 HC H,0z NH 0.108M NH Questions EXPERIMENT 3 Electrolytes and conductivity 1....
Please help, I need 3 to 4 sentences each for questions 1-4. When answering, please use...
Please help, I need 3 to 4 sentences each for questions 1-4.
When answering, please use a scientific writing style
as it states in the discussion section.
Chemical reaction equations Lab 1. KHC8H404(aq) + NaOH(aq) + H20 (1) + NaKC8H404(aq) Lab 2. HCH3CO2(aq) + NaOH(aq) → H20(1) + NaCH3CO2 (aq) (Eq 1) (Eq 2) Results Brand of vinegar analyzed in Lab 2: Great Value Amount of acetic acid in the vinegar claimed on the label: 5 % acidity Name of...
Introduction: The technique used to separate an organic compound from a mixture of compounds is called...
Introduction: The technique used to separate an organic compound from a mixture of compounds is called Extraction. Extraction process selectively dissolves one or more of the mixture compounds into a suitable solvent. The solution of these dissolved compounds is referred to as the Extract. Here the organic solvent dichloromethane is used to extract caffeine from an aqueous extract of tea leaves because caffeine is more soluble in dichloromethane (140 mg/ml) than it is in water (22 mg/ml). However, there are...
Question 5: How would dust and oil on the glass plates affect the results? EXPERIMENT 10 THIN FILM I...
Question 5:
How would dust and oil on the glass plates affect the
results?
EXPERIMENT 10 THIN FILM INTERFERENCE Light from a monochromatic source is shined downward on two glass plates that are separated at one end by a hair. Light that is reflected from the top and bottom surfaces of the wedge-shaped thin film of air undergoes interference, and a series of dark and light lines are seen. By counting the number of dark or light lines over a...
Beer’s Law Objective : We will explore an application of absorption spectroscopy using calibration curves and...
Beer’s Law Objective : We will explore an application of absorption spectroscopy using calibration curves and Beer’s Law. Use the “LAB : HOW TO…” link from the class website if you need help with how to use balance, Bunsen burner… and such. Introduction: You may write this information in your lab notebook for your own reference. It can’t be cut and pasted. Different solutions have different spectral properties. In this portion of the experiment those properties will be utilized to...
Q1- When you have a several equipment in your factory and you plan to use a...
Q1- When you have a several equipment in your factory and you plan to use a strategy that requires maintenance tasks to be performed at set time intervals while the asset is operational. regardless of whether signs of deterioration are prevalent or not. what kind of maintenance activities you plan to use in this case and why Q2- Discuss the following chart and where the optimal amount of preventive maintenance occurs? Q3- A sample of ten machines that underwent maintenance...
SPSS: Correlation Use SPSS or Excel to calculate the appropriate correlation coefficient for the following data...
SPSS: Correlation Use SPSS or Excel to calculate the appropriate correlation coefficient for the following data for “Hours of Exercise” and “Life Satisfaction.” (0 = Not at all satisfied). Provide an APA-style results section write – up. (b) Graph the relationship. HINT: Below you will find instructions for the APA-style write-up. Complete the write-up on a word document and upload the file for submission. Hours of Exercise Life Satisfaction 2 6 0 2 5 13 6 15 1 3 2...
1. Why can the DSO only measure node voltages when the Function Generator is the power supply in ...
1. Why can the DSO only measure node voltages when the Function Generator is the power supply in a circuit (unless it is using a current probe)? 2. Consider Figure 1. According to the calculations in the lab handout, if Z-1kΩ +/6914, then the phase difference (фи-фі) between u(t) and i (t) is 34.6". a. If this v(t) and i(t) were displayed on a DSO (v(t) being a node voltage and using a current probe for i(t) as shown in...
In a laboratory setting, one way to ensure accuracy is to use repeated measurements when conducting an experiment. Suppose that a lab assistant was given 10 experiments to conduct. After each experiment, she had to measure the weight of the result on two different scales, scale A and scale B. The mean difference of the weights of the 10 experimental results was 1.87 grams with a standard deviation of 1.33 grams (scale A – scale B). It is suspected that...
CHEMICAL BO NDING and PROPERTIES of COMPOUNDs Use theory portion of this lab, and information from chapters 4 and 5 to to mplete this PreLab Fill in the blanks: MOLNCULARSA 1. a. The measure of an atom's attraction for the electrons in a bond is its uEne m trvs ewperivne bonding involves a transfer of electrons between two atoms c. Sharing of electrons in a bond between two atoms is... bondig d. A pure covalent or non-polar covalent bond exists...
STUDENT INFO Name: Date: Course/Section: Results EXPERIMENT3 Electrolytes and conductivity Results Units Conductivity Concentration (M) Solution 0.O43 Distilled water L02 7 C Tap water CaH,OH 5219 НC 19.13 Cm OSOM НС 35.90 0.020M 0,02- На 0.0SS GloM HNO KOH Glor KCI MS 2002 0.loM KNO 5.952 O.10M Ca(NOsl NHS em 1335 HОН0, UT Units Conductivity Mixture Concentration (MX OIOM 21.69 нс HC-KNO OLon KNO 0,10M Hо-но .907 6.01 HC H,0z NH 0.108M NH Questions EXPERIMENT 3 Electrolytes and conductivity 1....
Please help, I need 3 to 4 sentences each for questions 1-4.
When answering, please use a scientific writing style
as it states in the discussion section.
Chemical reaction equations Lab 1. KHC8H404(aq) + NaOH(aq) + H20 (1) + NaKC8H404(aq) Lab 2. HCH3CO2(aq) + NaOH(aq) → H20(1) + NaCH3CO2 (aq) (Eq 1) (Eq 2) Results Brand of vinegar analyzed in Lab 2: Great Value Amount of acetic acid in the vinegar claimed on the label: 5 % acidity Name of...
Question 5:
How would dust and oil on the glass plates affect the
results?
EXPERIMENT 10 THIN FILM INTERFERENCE Light from a monochromatic source is shined downward on two glass plates that are separated at one end by a hair. Light that is reflected from the top and bottom surfaces of the wedge-shaped thin film of air undergoes interference, and a series of dark and light lines are seen. By counting the number of dark or light lines over a...
Q1- When you have a several equipment in your factory and you plan to use a strategy that requires maintenance tasks to be performed at set time intervals while the asset is operational. regardless of whether signs of deterioration are prevalent or not. what kind of maintenance activities you plan to use in this case and why Q2- Discuss the following chart and where the optimal amount of preventive maintenance occurs? Q3- A sample of ten machines that underwent maintenance...
1. Why can the DSO only measure node voltages when the Function Generator is the power supply in a circuit (unless it is using a current probe)? 2. Consider Figure 1. According to the calculations in the lab handout, if Z-1kΩ +/6914, then the phase difference (фи-фі) between u(t) and i (t) is 34.6". a. If this v(t) and i(t) were displayed on a DSO (v(t) being a node voltage and using a current probe for i(t) as shown in...
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