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2. From the same source of S-1-phenylethylamine, two solutions were made of differing concentrations. Will the...
Suppose that you have two different solutions made using the same solvent. When you cool the firs...
Suppose that you have two different solutions made using the same solvent. When you cool the first one, the entire solution freezes at a single temperature. When you cool the second one, however, the solution starts freezing at one temperature, but the temperature is different when it finishes freezing. Which of the two solutions has the lower freezing point, and why? 2.
Suppose that you have two different solutions made using the same solvent. When you cool the first one,...
5. The following data were obtained when Bio 106 students created solutions of the following concentrations...
5. The following data were obtained when Bio 106 students created solutions of the following concentrations (column 1), These students then placed three different samples of each concentration in a spectrophotometer and measured the absorbance. The following data table was created by these students. Create a standard curve from the data in the following table. Be sure to calculate the average absorbance for each concentration (round to two decimal places). After you have created the table, answer the following questions....
Suppose that you have two different solutions made using the same solvent. When you cool the...
Suppose that you have two different solutions made using the same solvent. When you cool the first one, the entire solution freezes at a single temperature. When you cool the second one, however, the solution startsfreezing at one temperature, but the temperature is different when it finishes freezing. Which of the two solutions has the lower freezing point, and why?
Two parallel dilution series were made from the same original sample. The plates with sample volumes...
Two parallel dilution series were made from the same original sample. The plates with sample volumes of 10- mL from e ach dilution series yielded 144 and 93 colonies. Suggest reasonable sources of error. What are the only circumstances that would correctly produce countable plates from two different dilutions?
Two identical solutions were put into cell samples and were 1 cm apart. The transmittance %...
Two identical solutions were put into cell samples and were 1 cm apart. The transmittance % for solution 1 is 39% and 96% for solution 2. When you combine the solutions together. What is the transmittance %. - 37% - 78% - 92% - 52% - 64% Please show full solution.
A concentration cell is made up of the same materials in two halves of different concentrations....
A concentration cell is made up of the same materials in two
halves of different concentrations. An example of a concentration
cell is in the following drawing:
A. In the cathodic cell, nickel solution was added in
concentration: [Ni+2] = 0.2M To measure the concentration of the
solution in the anodic cell, measure the cell voltage and find it
0.009
volt.
A. Calculate the concentration of the unknown solution.
B. In another experiment, the half cell containing a nickel
electrode,...
Two rods of the same length Rod 1 and diameter are made from different materials. The...
Two rods of the same length Rod 1 and diameter are made from different materials. The rods are Ti to connect two regions of different temperature so that energy will transfer through the rods by heat. They can be connected in series, as in Figure (e), or in parallel, as in Figure (b), In which case is the rate of energy transfer by heat larger? T. T. Rod1Rod 2 Rod 2 a)When the rods are in series. b) When the...
1. A series of solutions, containing cobalt (I1) chloride were prepared with concentrations shown below. Using...
1. A series of solutions, containing cobalt (I1) chloride were prepared with concentrations shown below. Using PhET Simulation find the absorbance values corresponding to each solution at the preset value of wave length 549 nm, using 1 cm wide cuvette. Concentration of Co (II), mM 121 98.0 60.0 24.0 15.0 Absorbance Plot a calibration line Absorbance versus Concentration. From the graph determine the specific absorptivity. 2. Using the data you obtained from the graph in the previous problem determine the...
THis problem is part of my final review guide for Pchem Five solutions of substrate (S)...
THis problem is part of my final review guide for Pchem
Five solutions of substrate (S) were prepared with the concentrations give in the first column below, and each one was divided into five equal volumes (total of 25 solutions). The same concentration of enzyme was present in each one. An inhibitor (I) was then added in different concentrations to the samples, and the initial rate of formation of product was determined with the results given below. Does the inhibitor...
What are the FENCS*2 concentrations in solutions 1 through 6 used for the calibration curve? Solution...
What are the FENCS*2 concentrations in solutions 1 through 6 used for the calibration curve? Solution FeNCS Concentrations 1 2 3 4 5 6 Calculate the value of Ksp from the following equilibrium concentrations: (FeNCS*2] = 1.71 x 104 M, [Fe**] = 8.28 x 104, and (SCN-2) = 4.28 104m
Suppose that you have two different solutions made using the same solvent. When you cool the first one, the entire solution freezes at a single temperature. When you cool the second one, however, the solution starts freezing at one temperature, but the temperature is different when it finishes freezing. Which of the two solutions has the lower freezing point, and why? 2.
Suppose that you have two different solutions made using the same solvent. When you cool the first one,...
5. The following data were obtained when Bio 106 students created solutions of the following concentrations (column 1), These students then placed three different samples of each concentration in a spectrophotometer and measured the absorbance. The following data table was created by these students. Create a standard curve from the data in the following table. Be sure to calculate the average absorbance for each concentration (round to two decimal places). After you have created the table, answer the following questions....
Two parallel dilution series were made from the same original sample. The plates with sample volumes of 10- mL from e ach dilution series yielded 144 and 93 colonies. Suggest reasonable sources of error. What are the only circumstances that would correctly produce countable plates from two different dilutions?
A concentration cell is made up of the same materials in two
halves of different concentrations. An example of a concentration
cell is in the following drawing:
A. In the cathodic cell, nickel solution was added in
concentration: [Ni+2] = 0.2M To measure the concentration of the
solution in the anodic cell, measure the cell voltage and find it
0.009
volt.
A. Calculate the concentration of the unknown solution.
B. In another experiment, the half cell containing a nickel
electrode,...
Two rods of the same length Rod 1 and diameter are made from different materials. The rods are Ti to connect two regions of different temperature so that energy will transfer through the rods by heat. They can be connected in series, as in Figure (e), or in parallel, as in Figure (b), In which case is the rate of energy transfer by heat larger? T. T. Rod1Rod 2 Rod 2 a)When the rods are in series. b) When the...
1. A series of solutions, containing cobalt (I1) chloride were prepared with concentrations shown below. Using PhET Simulation find the absorbance values corresponding to each solution at the preset value of wave length 549 nm, using 1 cm wide cuvette. Concentration of Co (II), mM 121 98.0 60.0 24.0 15.0 Absorbance Plot a calibration line Absorbance versus Concentration. From the graph determine the specific absorptivity. 2. Using the data you obtained from the graph in the previous problem determine the...
THis problem is part of my final review guide for Pchem
Five solutions of substrate (S) were prepared with the concentrations give in the first column below, and each one was divided into five equal volumes (total of 25 solutions). The same concentration of enzyme was present in each one. An inhibitor (I) was then added in different concentrations to the samples, and the initial rate of formation of product was determined with the results given below. Does the inhibitor...
What are the FENCS*2 concentrations in solutions 1 through 6 used for the calibration curve? Solution FeNCS Concentrations 1 2 3 4 5 6 Calculate the value of Ksp from the following equilibrium concentrations: (FeNCS*2] = 1.71 x 104 M, [Fe**] = 8.28 x 104, and (SCN-2) = 4.28 104m
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