What is the absorbance of a spectrophotometer?
1. What is the absorbance of a spectrophotometer?
Here's my answer:)
A spectrophotometer is an instrument that measures the amount of photons (the intensity of light) absorbed after it passes through sample solution. With thespectrophotometer, the amount of a known chemical substance (concentrations) can also be determined by measuring the intensity of light detected.
2. What is the equivelent of spectrophotometer?
Answer:
i dunno beacause im doing to my task
Explanation:
3. What is the function of a spectrophotometer labster?
Answer:
A spectrophotometer is an instrument that determines the ratio between the intensity of light emitted from an internal source and that which passes through a given solution. This ratio can be used to determine the concentration of dissolved molecules in a sample.
4. Directions. Choose the correct answer from the given choices. Write the letter of youranswer in your answer sheet.1. Which of the following does not belong to the group?a. pHc. limeb. salinityd. temperature2.What water quality parameter is affected if the pond needs to be limed?a. dissolved oxygenc. temperatureb. pH of the pondd. turbidity3. What is the most ideal pH of the pond water for the fish growth?a. 5-9c. 7-9.5b. 6.5-9d. 4-5.54. Which if the following will result if there is a heavy application of manure inthe pond?a. increase of ammonia levelb. increase of the fertility of the soilc. increase of hydrogen sulfide leveld. all of the above5. Which of the following factors in a pond operation will ensure afish population?a. proper stocking managementb. water quality managementc. feeding managementhealthyd. all of the above6. Which of the following is a sign of oxygen depletion in the pond?a. Fish are in group swimming.c. Fish eat actively.b. Fish are staying at the surface of the water. d. all of the above7. How is a pH reading below 7 considered?a. Neutralc. Alkaline4.b. Acidicd. None of the above8. Which of the following is not an effect of ammonia to fish?a. good growthc. poor growthb. excessive production of slimed. distended operculum9. Which of the following instruments is used to measure the salt concentration in the water?a. Secchi discb. Thermometerc. Refractometerd. Spectrophotometer10. Which of the following instruments is used to indicate the presence of natural food in the pond? a. Thermometerb. Spectrophotometerc. Sec hi discd. Refractometer
Answer:
1. d
2. a
3. non
4. b
5. c
6. c
7. b
8. c
9. b
10. b
5. 7. Which of the following is a common earthquake measuring devicee? A. pendulum C. laser satellite B. seismograph D. spectrophotometer
Answer:
The answer would be B. Seismograph
Explanation:
6. Experiment• spectrophotometer• extraction and washing• distillationwhen will this experiment be if used?what are the common apparatus and equipment used in the experiment?how do we conduct the experiment?
Answer:
ikaw daw mag experiment indi daw kami
Explanation:
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Answer:
mag experiment ka para Malaki yang Marka mo
7. A component of a spectrophotometer that isolates radiant energy of a specific wavelength and excludes that of other wavelengths is called a(n): all of the choices grating slit filters monochromator
Answer:
All types of EMR have the same energy. A component of a spectrophotometer that isolates radiant energy of a specific wavelength and excludes that of other wavelengths is called a(n): photomultiplier tube. incandescent lamp. monochromator.
correct me if i'm wrong
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8. b. Thermometer d.Spectrophometer7. Which of the following instruments is used to indicate the presence of natural food in the pond? a. Thermometerb. Spectrophotometerc. Sechi discd. Refractometer
Answer:
6.d
7.d
Explanation:
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9. 9. What instrument is being used to differentiate which wavelengths of light a substance can absorb? A. Photo paper B. Spectrogram C. Spectrophotometer D. Prism
Answer:
B po thanks me later ok
Explanation:
Hope it helps you :)
Explanation:
D
d Kase pag tumaama Ang light dyan mag iiba Ang kulay Ng light na tatagos
10. The component of a spectrophotometer that is responsible for detecting transmitted light and converting light energy to electrical energy is the:
Answer:
the detector
Explanation:
11. What is the absorbance of a spectrophotometer? Select one: a. 270 nm b. 220 nm c. 260 nm d. 230 nm
Spectrophotometer has the absorbance of 260 nm. Therefore, the answer is letter C.
12. 3. What geologic structure is formed around a weak area of the earth's crustthrough which molten rock from beneath reaches the surface?A. mountainB. volcanoO C. trench OD. plateau4. A geologic feature which is a highland with a small summit area.O A. mountain O B. volcano O C. hill O D. french5. Whaf volcano is found in Zambales that had a major eruption on June15,1990?O A. Pamatawan O B. Pinatubo OC. PanaboD. Pinalubos6. The science that studies earth's structure isO A. GeologyB. Volcanology O C. Meteorology OD. Astrology7. It is a mass of molten rock formed from a depth including dissolved gases andcrystals.O A. magmaB. lava O C. sediments O D. fossils8. It is a chain of mountains.O A. Ring of fire OB. Mohorovicic CC. Mountain ranges O D. Chain reaction9. Which of the following is an active volcano in the Philippines with a perfectcone?O A. Taal O B. PinatuboОС. АроD. Mayon10. Which of the seismic waves travels the fastest?O A. P-wave B. S-wave O C. L-wave OD. Rayleigh wave11. Which of the following is a common earthquake measuring device?O A. pendulumC. laser satelliteB. seismographD. spectrophotometer12. Which of the following causes the wiggly lines on seismograms?O A. tidal wave OC.ground vibrationB. air pressureO D. electromagnetic pulse13. When two tectonic plates collide, the oceanic crust usually subductsbeneath the continental crust because it isO A. denser than the continental crustO B. less dense than continental crustO C. thicker than continental crustO D. thinner than continental crust14. What are found in places where volcanoes and earthquake epicenterslocated?A. mountain rangesO C. rift valleyO B. oceanic ridgeO D. trench
Answer:
3. B. volcano
4. A. mountain
5. B. Pinatubo
6. A. Geology
7. A. magma
8. C. Mountain ranges
9. D. Mayon
10. A. P-waves
11. B. seismograph
12. C.ground vibration
13. B. less dense than continental crust
14. A. mountain ranges
13. 1.Urea acts as a binding agent during the reading of DNA sequences. Select one: a. False b. True 2.What are the two most common precipitants for DNA? Answer: 3.What is the most common method for separating DNA? Answer: 4.What enzymes are used to cleave DNA into smaller fragments? Answer: 5.Larger DNA fragments move slower than smaller DNA fragments. Select one: a. False b. True 6.The purpose of Answer is to count the amount of nucleic acids present. Previous page 7.Gel electrophoreses relies on the fact that nucleic acids are polyanionic at low pH. Select one: a. False b. True 8.SAGE stands for Answer: 9.What is the absorbance of a spectrophotometer? Select one: a. 230 nm b. 260 nm c. 270 nm d. 220 nm 10.What element is used to isolate pDNA? Select one: a. Carbon b. Caesium c. Hydrogen d. Magnesium #oed
Correct Answers
1. False
2. Isopropanol and Ethanol
3. Gel Electrophoresis
4. Restriction enzymes (or restriction endonucleases)
5. True
6. Scintillation Counter
7. False
8. Serial Analysis
9. 260 nm10
10. Cesium
AMA OED
14. Write TRUE if the statement is correct, and FALSE if it is incorrect.1. A living cell stores significant amount of free energy.2. Nicotinamide adenaline dinucleotide (NAD) is derived from vitamin B.3. Photosynthesis is vital because it evolved as a way to store the energy in solarration as high-energy electrons in the carbon-carbon bonds.4. Photosynthesis takes place in chloroplast.5. Sun emits an enormous amount of electromagnetic radiation.6. Light energy initiates the process of photosynthesis when pigments absorb thelight.7. Spectrophotometer can differentiate which wavelengths of light a substancecan absorb8. There are five basic stages for the light-independent reactions of the Calvincycle.9. Glycolysis takes place in the cytoplasm of the cells.10. The fermentation method used by animals and bacteria is alcohol fermentation.
Answer:
FALSETRUETRUEFALSETRUEFALSEFALSETRUEFALSEFALSEExplanation:
hope my answer help
15. What is the function of a spectrophotometer labster g?
Answer:
A spectrophotometer is an instrument that determines the ratio between the intensity of light emitted from an internal source and that which passes through a given solution. This ratio can be used to determine the concentration of dissolved molecules in a sample.
16. When performing spectrophotometer quality assurance checks, what is the holmium oxide glass filter used to assess?
Answer:
The presence of the certified bands using a reference such as another certified holmuim oxide filter or alternatively the user can overlap the spectra for the sample in question with a reference spectrum
17. A spectrophotometer is made up of two devices: a spectrometer that produces, disperses, and measures the wavelength of light; and a photometer which measures the intensity of light. Explain the importance of these two parts in determining the amount of vitamin C in an orange drink.
Answer:
Explanation:
Spectrophotometry is a method to measure how much a chemical substance absorbs light by measuring the intensity of light as a beam of light passes through sample solution. The basic principle is that each compound absorbs or transmits light over a certain range of wavelength. This measurement can also be used to measure the amount of a known chemical substance. Spectrophotometry is one of the most useful methods of quantitative analysis in various fields such as chemistry, physics, biochemistry, material and chemical engineering and clinical applications.
18. Chopping the source beam in conjunction with the use of a tuned ac amplifier in an atomic absorption spectrophotometer accomplishes the following:
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19. Why are blanks used in a spectrophotometer journal article?
Answer:
It is important to "blank" the spectrophotometer before taking an absorption measurement of a sample at each new wavelength, because the water and cuvette also absorb light, so the spectrophotometer won't measure the absorption of water and cuvette.
Explanation:
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20. Which is not an appropriate detector for a spectrophotometer?
Answer:
Photomultiplier tube is the popular detector nowadays used in UV-Vis spectrophotometers. It has an anode, cathode, and many dynodes. Photon when entering the tube, strikes the cathode, resulting in the emission of electrons.
Explanation:
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21. 1. Test method used by forensic chemist to separate components of a mixture. a. UV Spectrophotometerb. Chromatography c. Fourier Transform InfraredSpectrophotometer d.Atomic Absorption Spectrophotometer 2.Which of the following statements is true with respect to chromatography? a.The higher the molecular weight of a substance, the faster is its absorption in the chromatogram b.The higher the molecular weight is, the lighter is the substance c.Lower molecular weight substance will exhibit slower absorption in the chromatogram d. None of the above. 3. Persons have unique fingerprints while substance also possess their own fingerprints known as a. blueprint b. spectra c.assay d. chemical composition 4. For chemical test result to be acceptable as evidence in court, it must be a. Scientifically correct b. One hundred percent accurate c. Obtained through any means possible d. All of the above. 5. The behavior of substance is determined by the electrons, protons and neutrons that make them up. To determine the identity of substances by analyzico the activity of neutrons the following analytical technique is required. a. Neutron Activation b Electrophoresis c. Spectrophotometry d. Scanning Electron Microsco
Answer:
1. B
2. D
3. B
4. D
5. A
Explanation:
22. In assaying an analyte with an atomic absorption spectrophotometer, what is the instrument actually measuring?
In assaying an analyte with a single-beam atomic absorption spectrophotometer, what is the instrument actually measuring: intensity of light emitted by teh analyte on its return to the ground state.
