Increasing the concentration ___________ the absorbance because the light has to travel through ______ of the light-absorbing solute.
Select the choice with words that best fills in the blanks in the following statement.
Homework Answers
Increasing the cuvette width increases the absorbance value because the light has to travel through more of the light absorbing solute. This is because from Beer's law
A = € c l where l is path length or cuvette width and A is absorbance. € is molar extinction coefficient and c is concentration.
Add Answer to:
Increasing the cuvette width ___________ the absorbance becausethe light has to travel through ______ of...
A student measures the absorbance of a solution containing FeSON on using a spectrophotometer. The cuvette...
A student measures the absorbance of a solution containing FeSON on using a spectrophotometer. The cuvette used by the student has two frosted walls and two transparent walls. The student properly orients the cuvette so that the path of the light goes through the transparent sides of the cuvette when calibrating the spectrophotometer. How will the measured absorbance of the FeSCN be affected if the student incorrectly orients the cuvette so that the path of the light is through the...
If the light from the laser diode passes through a cuvette with a solution of concentration 10 mg...
If the light from the laser diode passes through a cuvette with a solution of concentration 10 mg/dL. The laser light emerging out of the cuvette has a brightness of about 20 Lux and falls on the detector CdS photoconductive cell GL5528, such that the resistance of the detector reads about 5 kOhm. Now, if the light from the laser diode passes through the same cuvette with a solution of unknown concentration. The laser light emerging out of the cuvette...
If the absorbance of light through a 1cm long DNA sample with a known concentration of...
If the absorbance of light through a 1cm long DNA sample with a known concentration of 100 mM (1mM is 10-3 molar) is A 6, what is the molar extinction coefficient for this particular DNA molecule? If another 1cm long sample with an unknown concentration of the same DNA molecule gives A = 5, what is the DNA concentration in this sample?
Question 3 2 pts Which of the following describes which grow light would have been the...
Question 3 2 pts Which of the following describes which grow light would have been the best choice for the biosphere? The green light because it has a wavelength of 500-570 nm which is the wavelength that is best absorbed by chlorophyll. The blue light because it has a wavelength of approximately 450-500 nm which is the wavelength best absorbed by chlorophyll. The red light because it has a wavelength of 610-700 which is a unique wavelength for chlorophylla Any...
Table 1. Concentrations of [Fe(Phen),1?, M, in water and UV- vis absorbance values recorded at 2...
Table 1. Concentrations of [Fe(Phen),1?, M, in water and UV- vis absorbance values recorded at 2 -505 nm. Concentration of [Fe(Phen)/, M Absorbance 9.500 x 10 0.999 4.250 x 10 0.480 0.219 2.125 10% 1.063 x 10 0.104 0.000 0.003 Table 2. UV-vis absorbance values of [Fe(phen)]* held at 35 °C after mixing with H SO, and recorded at 5 minute intervals (in water at max = 505 nm). Time (minutes) Absorbance 0.997 0.935 0.877 0.823 0.772 0.724 0.680 0.638...
Another sample of KMnO4 solution has 80% of light of a given , passing through it...
Another sample of KMnO4 solution has 80% of light of a given , passing through it was transmitted when a cell of 4 cm was used for the sample analysis and the molar absorptivity was 2. Show that the concentration is 0.05 g/L Calculate the transmittance and Absorbance if the %T is (a) 1% (b) 10% (c) 100% If 25.8 mg of Benzene is dissolved in 250 ml of solution that absorbed at 256 nm, with absorption coefficient or molar...
(a) Arrange the following types of spectroscopic transition in order of increasing energy: vibrational, electronic, rotational....
(a) Arrange the following types of spectroscopic transition in order of increasing energy: vibrational, electronic, rotational. (b) In which regions of the electromagnetic spectrum do each of the transitions in part occur? (c) The red colour of tomatoes is due to the presence of lycopene, a carotenoid pigment, which absorbs strongly at 22,222 cm-1. (d) What wavelength of light does lycopene absorb? Give your answer in nm. (e) What colour is this light? (f) What type of spectroscopic transition gives...
Chromatic aberration comes from the fact that different wavelengths of light travel at different speeds through the ma...
Chromatic aberration comes from the fact that different wavelengths of light travel at different speeds through the material of the lens; that is, they have different indices of refraction, a property known as dispersion. This means that a lens, in effect, has different focal lengths for different wavelengths of light. Consider a lens made to the following specifications: focal length for red light fred=19.57cm, focal length for blue light fblue=18.87cm. Part A Consider an object 5.000cm tall placed a distance...
Not all words or phrases will be used. Each word or phrase should be used only...
Not all words or phrases will be used. Each word or phrase
should be used only once:
membrane potential, free diffusion, hydrophilic, transporter
protein, facilitated diffusion, active transport, concentration,
hydrophobic, noncovalent, amino acid, symport, amphipathic, ion
channel, passive transport, passive, light driven.
For each of the following sentences, fill in the blanks with the best word or phrase selected from the list below. Not all words or phrases will be used; each word or phrase should be used only once....
Question 5 1 pts Keep in mind that the absorbance was plotted on the y-axis and...
Question 5 1 pts Keep in mind that the absorbance was plotted on the y-axis and concentration of Fe in mg/mL was plotted on x-axis to get best-fit line equation from the standard solutions. If the best fit line equation is y = 100x +0.01 What is the Fe concentration in mg/mL if the absorbance is 0.4 based on the best-fit line equation? Keep two sig figs for your answer. The Total Cereal has a Fe concentration of 0.6 g...
A student measures the absorbance of a solution containing FeSON on using a spectrophotometer. The cuvette used by the student has two frosted walls and two transparent walls. The student properly orients the cuvette so that the path of the light goes through the transparent sides of the cuvette when calibrating the spectrophotometer. How will the measured absorbance of the FeSCN be affected if the student incorrectly orients the cuvette so that the path of the light is through the...
If the absorbance of light through a 1cm long DNA sample with a known concentration of 100 mM (1mM is 10-3 molar) is A 6, what is the molar extinction coefficient for this particular DNA molecule? If another 1cm long sample with an unknown concentration of the same DNA molecule gives A = 5, what is the DNA concentration in this sample?
Question 3 2 pts Which of the following describes which grow light would have been the best choice for the biosphere? The green light because it has a wavelength of 500-570 nm which is the wavelength that is best absorbed by chlorophyll. The blue light because it has a wavelength of approximately 450-500 nm which is the wavelength best absorbed by chlorophyll. The red light because it has a wavelength of 610-700 which is a unique wavelength for chlorophylla Any...
Table 1. Concentrations of [Fe(Phen),1?, M, in water and UV- vis absorbance values recorded at 2 -505 nm. Concentration of [Fe(Phen)/, M Absorbance 9.500 x 10 0.999 4.250 x 10 0.480 0.219 2.125 10% 1.063 x 10 0.104 0.000 0.003 Table 2. UV-vis absorbance values of [Fe(phen)]* held at 35 °C after mixing with H SO, and recorded at 5 minute intervals (in water at max = 505 nm). Time (minutes) Absorbance 0.997 0.935 0.877 0.823 0.772 0.724 0.680 0.638...
Another sample of KMnO4 solution has 80% of light of a given , passing through it was transmitted when a cell of 4 cm was used for the sample analysis and the molar absorptivity was 2. Show that the concentration is 0.05 g/L Calculate the transmittance and Absorbance if the %T is (a) 1% (b) 10% (c) 100% If 25.8 mg of Benzene is dissolved in 250 ml of solution that absorbed at 256 nm, with absorption coefficient or molar...
Not all words or phrases will be used. Each word or phrase
should be used only once:
membrane potential, free diffusion, hydrophilic, transporter
protein, facilitated diffusion, active transport, concentration,
hydrophobic, noncovalent, amino acid, symport, amphipathic, ion
channel, passive transport, passive, light driven.
For each of the following sentences, fill in the blanks with the best word or phrase selected from the list below. Not all words or phrases will be used; each word or phrase should be used only once....
Question 5 1 pts Keep in mind that the absorbance was plotted on the y-axis and concentration of Fe in mg/mL was plotted on x-axis to get best-fit line equation from the standard solutions. If the best fit line equation is y = 100x +0.01 What is the Fe concentration in mg/mL if the absorbance is 0.4 based on the best-fit line equation? Keep two sig figs for your answer. The Total Cereal has a Fe concentration of 0.6 g...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 10 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 10 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 10 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 10 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 10 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 10 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 10 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 10 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 10 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 10 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 10 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 10 months ago