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During Size exclusion chromatography, if VT = 30 mL, Vs = 15 cm3 , and VL = 15 mL, Vi is     7 mL     8 mL     Not enough information     15 mL

The methodology of choice for measuring therapeutic drug levels is   Question 4 options:   immunoassay   chromatography   atomic absorption spectrophotometry   spectrophotometry

Gas chromatography would NOT be appropriate to use for a sample that is decomposed by heat a mixture of two or more substances with different boiling points very small O in liquid form at room temperature

Using the data below, please create a calibration graph and determine the concentration of the unknown sample. Standard #1 Standard #2 Standard #3 Unknown sample Concentration 1.5 x 10 M 2.0 x 103 M 2.5 x 10 M ? Absorbance 0.61 0.80 0.98 0.72 a) 1.6 x 10 M b) 1.8 x 10° M c) 2.1 x 103M d) 2.2 x 10 M

What is the most accurate volume that the graduations can measure in this instrument? Pinch and zoom in if necessary. Ctrl ++ zooms in if using Windows.   ±0.1 mL   ±1 mL ±10 mL ±5 mL ±2 mL  ±20 mL

Determine the volume of a sample of copper in (m³) with a mass of 2.2 x 105 tons and a density of 8.96 g/cm. (1 ton = 2205 lbs, 1 lb = 16 ounces, 1 kg = 2.20 lbs,1 kg = 1000g. 100 cm = 1m) %3D %3! %3D

■ True or False: in a TOF analyzer, a fragment of low mass reaches the detector first ▪ In GCMS when we know what analytes we are measuring we use not know what analytes are in the sample we use than scan. ▪ A) Scan; SIM ■ B)SIM; scan • C) SIM; SIM mode. When we do mode. SIM allows greater sensitivity

You have prepared several dilutions of a standard compound. You measure the absorbance of each solution at 340 nm using a 1 cm cuvette and your results are listed in the table below. Determine the concentration of an unknown sample with an absorbance of 0.085 at 340 nm. Concentration (uM) Absorbance at 340 nm 2. 0.009 4. 0.020 0.061 16 0.111 32 0.189

How is light and energy used in gas chromatography- mass spectrometry (GC-MS)?

A 1.058-g sample of a copper unknown was dissolved in water and diluted to a final volume of 100.0 mL. The sample was analyzed using a UV/VIS spectrophotometer and the absorbance was found to be 0.529. The calibration curve gave a best fit line of A = 8.58 M. Calculate the %(w/w) Cu in the sample. Give your answer to one place after the decimal. Do not enter units.

A series of standards were analyzed which gave the following results SOLUTION % Transmittance  0 mL of 0.100 mg/mL Hg + 2 mL tinchloride in a total volume of 75 mL 100 1.0 mL of 0.100 mg/mL Hg + 2 mL of tinchloride in a total volume of 75 mL 81.3 2.0 mL of 0.100 mg/mL Hg + 2 mL of tinchloride in a total volume of 75 mL 63.9 3.0 mL of 0.100 mg/mL Hg + 2 mL of tinchloride in a total volume of 75 mL 55 5.0 mL of 0.100 mg/mL Hg + 2 mL of tinchloride in a total volume of 75 mL 35.1 How would you make a Beer-Lambert Plot with this information?

2 What methods are used to sep X G In Part Il of experiment 5, a 1:1: X + u/ultra/courses/_393452_1/cl/outline * Question Completion Status: QUESTION 3 After you complete the second step, you will be left with a clear colorless liquid. What should be done to the liquid to finish the separation? O Heat the mixture to evaporate the liquid O Add a base to neutralize the solution. O Nothing - you are done since you have a pure, clear, colorless substance O Add the residue back to the solution and dry. QUESTION 4 In Part II of experiment 5, a 1:1:1 mixture of sand, salt, and salicylic acid must be separated. Order the following steps necessary to separate this mixture into three pure, dry solids. Filter the liquid leaving a filtrate with just salt dissolved and a residue of sand. v Add hot water to the residue obtained in two steps prior to this one. Filter the liquid leaving a filtrate with just salicylic acid dissolved and a residue of salt and sand. v Heat the filtrate obtained in two…

What is gravimetric analysis? Group of answer choices Density measurement Mass measurement Viscosity measurement Volume measurement

Which one of the following techniques cannot be used to measure the amount of Ni in a sample? O gas chromatography visible light spectrometry voltammetry ICP-MS O atomic absorption spectrometry

I need help with the chart being filled out please and thanks.