ScienceTEKS56CLessonPlan-1

A protein’s concentration can be determined spectrophotometrically by mixing it with an indicator called a Bradford reagent and measuring the amount of light absorbed by the protein. Use the plot below to determine the mass of protein (in micrograms, μμg ) in 100.0 mL of the solution if its absorbance is 0.398. A.  52 B.  3.1 C.  2.4 D.  0.52 E.  0.031

Mastery Assess Chemistry-S2-MI/Traveling Through Media / Lesson 180 17. Calculate the speed of light in a sugar solution. The index of refraction for the sugar solution is 1.33. Remember that the speed of light is 2.998-108 m/s. O2.998-108 m/s 3.99-10 m/s 2.25-108 m/s 4.33-108 m/s PREVIOUS 12 O Q tab ! 1 q a Z @ 2 W S → #m X 1 e d C $ 4 C r f % 5 V t 6.0 Oll 6 y b & ог 7 h 0 C n * k 00 8 0 i ( 3 9 k 4 O ) 0 18 1 alt Р

42.) UV radiation is utilized in a range of industrial operations as well as medical and dental treatments for a variety of purposes, including destroying bacteria, creating fluorescent effects, curing inks and resins, phototherapy, and suntanning. UV wavelengths and intensities are employed for a variety of applications. Which of the following would take place when you increase the frequency of ultraviolet light?  The wavelength of the UV radiation would increase.   The speed of the UV radiation would increase.   The wavelength of the UV radiation would be the same.   The speed of the UV radiation would be the same.

Force Completion Once started, this test must be completed in one sitting. Do not leave the test before clicking Save and Submit Remaining Time: 36 minutes, 58 seconds. Question Completion Status: A Moving to another question will save this response. Question 9 Which of the following compounds gives an infrared (IR) spectrum with a peak at 1730 cm (strong peak)? ОН ОН 1 2 3 4 2 3 4 A Moving to another question will save this response. MacBook Air OO0 D00 F4 F2 II F8 F3 F5 F6 F7 F9 $ & 2 5 7 8 tA4 #3

How does the light compound microscope magnify an object? Outline the process

Chemically active surfaces are seen on alumina-containing zeolites. Interpret this statement.

Chemical dyes are used to increase resolution of objects.   True False

You are required to measure a sample that absorbs at a wavelength of 300 nm and 4 µm.What would you use as your light source? Justify your answer.

CES Practice, Question 05 X Your answer is incorrect. Try again. Select ALL the correctly matched terms: O Immersion oil/ Oil with a different refrative index than air, used to enhance magnification O Luminescence/ Absorption of light and energy within a sample O Fluorescence/ Absorbed light rays are changed into longer wavelengths and re-emitted O Diffraction/ Bending of light rays around an opening 6 LINK TO TEXT 8 20 study 1 T四 24 MacBook Pro

Place the following types of radiation in order of increasing wavelength by numbering them from 1 (lowest) to 4 (greatest). 1024 1022 y-rays 1020 10-16 10-14 10-12 3 1018 x-rays 10-10 microwaves in a microwave oven 2 1016 UV yellow light from a sodium lamp x-rays from an instrument in a dentist's office 10-8 1014 10-6 4 IR 10¹2 10-4 1010 3 108 Microwave FM 10-² AM Radio waves your favorite FM music station at 91.7 MHz Drag and drop your selection from the following list to complete the answer: 10⁰ 106 4 10² 104 104 10² 1 Long radio waves 10⁰ 105 108 v (Hz) A (m)

Question 5 Which property of laser light is NOT correctly defined/described? extremely bright: high power at one wavelength monochromatic: emits one wavelength of light collimated: parallel rays of light polarized: electric field oscillates between two perpendicular planes

14. The molar absorptivity for ferricyanide ion (FW = 211.95 g/mol) at 420 nm is 1010 M¹cm¹. What is the concentration of ferricyanide in a solution that yields an absorbance of 0.354 in a 1.00-cm cuvette? a) 30 ppm b) 45 ppm c) 60 ppm d) 75 ppm e) 90 ppm 15. Deviations from Beer's law are observed when measurements are made a) with highly concentrated solutions b) using polychromatic light sources c) in the presence of stray light all of these e) none of these 16. Photometric assays typically involve measuring absorbance at an analyte's "Amax" in order to a) maximize sensitivity b) maximize selectivity c) maximize accuracy d) maximize precision e) maximize detection limit 17. The calibration curves shown at the right indicate the photometric measurements satisfy Beer's law at both 550 nm and 635 nm. Which statement below is true? a) analysis at 550 nm yields a more sensitive analysis b) analysis at 635 nm yields a more sensitive analysis c) analysis at 550 nm yields a more selective…

The infrared part of the solar light on the surface of earth as wavelengths between look at the picture. What frequency range does this window correspond onto?

A laser emits two wavelengths (₁ = 420 nm; λ₂ = 630 nm). When these two wavelengths strike a grating with 450 lines/mm, they produce maxima (in different orders) that coincide. Part A What is the order (m) of each of the two overlapping lines? Express your answers as integers separated by a comma. m1, m2 = ΜΕ ΑΣΦ Submit Request Answer Part B At what angle does this overlap occur? Express your answer using two significant figures. 0 = ΕΧΕΙ ΑΣΦ Submit Request Answer ? ?

Compare: absorption of light at a certain wavelength CH₂ 1. II. CH₂ the quantity in I is greater (I absorbs at longer wavelength) the quantity in II is greater (II absorbs at longer wavelength) the two quantities are equal (both absorb at the same wavelength) the relationship cannot be determined due to insufficient information

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Green plants absorb sunlight to power photosynthesis, the chemical synthesis of food from water and carbon dioxide. The compound responsible for light absorption and the color of plants, chlorophyll, strongly absorbs light with a wavelength of 642.nm. Calculate the frequency of this light. Round your answer to 3 significant digits. || THz

At a given point in its orbit, the Moon is 2.89 x 105 miles from Earth. How long (in seconds) does it take light from a source on Earth to reach a reflector on the Moon and then return to Earth? (c = 2.9979 x 108 m/s) Type your answer...

Analysis: What is an ion? Describe what happens to the electrons in an atom when they absorb energy (from the flame)?  Why does this produce a bright-line emission spectrum (rather than a continuous spectrum)? In terms of atomic structure, why does each metal ion produce a different color flame? What difficulties are there in identifying metal ions with a flame test?  How could you improve the specific identification of the metal ions during a flame test? If it can be determined from the flame test results, what are the identities of the two unknown liquids? What might be some practical (and exciting) applications of metal containing compounds that create different colors of light while burning?  Explain.

Question 20 Which of the following is false? Lemons reflect large amounts of light from the red part of the spectrum. If the "red" cones are stimulated, the perceiver will see red. Cones, one kind of human photoreceptor, are used in color vision. The light reaching the eye from an object depends on its reflectance and the illuminant.

15 Be sure to answer all parts. One reason carbon monoxide (CO) is toxic is that it binds to the blood protein hemoglobin more strongly than oxygen does. The bond between hemoglobin and CO absorbs radiation of 1953 cm1. (The units are the reciprocal of the wavelength in centimeters.) Calculate the wavelength (in nm and Å) and the frequency (in Hz) of the absorbed radiation. Enter your answers in scientific notation. 3 Wavelength 5.12 x 10 nm On-Screen Keyboard 5.12 х 10 4 Å #3 $ Esc 13 1 2 3 4 Frequency 5.85 х 10 Hz Tab q w e r t y Сaps a d f g h S Shift Z X C V Fn Ctrl = Alt

The dust in a molecular cloud emits at maximum intensity at a wavelength of 57 µm. What is the temperature of the cloud (in K)?

You left a glass full of homogenized milk on a table undisturbed for half an hour. What would result if you shined a laser beam against the side of the glass? * The beam of light will be reflected back to its original source. No light will pass through the two side of the glass. A path of light will be visible from one side of the glass. The beam of light will not be reflected nor will it be visible.

1.1 Radio wave radiation falls in the wavelength region of 10.0 to 1000 meters. What is the frequency of radio wave radiation that has a wavelength of 66.7 m?Frequency =  sec-1 2.2 A local FM radio station broadcasts at a frequency of 96.4 MHz. Calculate the wavelength at which it is broadcasting. Wavelength =  meter 3. A local AM radio station broadcasts at a frequency of 796 kHz. Calculate the wavelength at which it is broadcasting. Wavelength =  m

1- A red organic compound found in tomatoes that starts with the letter L? 2- Why is the visible spectrum a quantitative and not a qualitative analysis? 3- Why estimate cobalt using visible rays? And what kind of it?

During this practical, we will be measuring the absorbance of Bromocresol green combined with albumin using a spectrophotometer. At what wavelength will we make this measurement?Question 3 Select one:a.320 nmb.400 nmc.628 nmd. 595 nme. 511 nm

The picture that has table might help you, answer the question using the hand writing,please write clearly on your ans