A banned pesticide, DDT, is analyzed through gas chromatography. A DDT standard is dilutedaccordingly to generate 1.00, 5.00, 10.00, 15.00, 20.00, and 25.00 ppm standards. These standardsgenerate peaks with peak areas of 0.100, 0.210, 0.295, 0.405, O.510, and 0.600, respectively. If anearby watershed sample is subjected to GC analysis, and the sample generated a 0.175 peak area,what is the concentration of DDT in the sample?3.12 ppm4.02 ppm5.09 ppm1.65 ppm3.75 ppmMusic off只

In analytical chemistry a calibration curve or standard curve, is plotted to determine the…

A banned pesticide, DDT, is analyzed through gas chromatography. A DDT standard is diluted accordingly to generate 1.00, 5.00, 10.00, 15.00, 20.00, and 25.00 ppm standards. These standards generate peaks with peak areas of 0.100, 0.210, 0.295, 0.405, 0.510, and 0.600, respectively. If a nearby watershed sample is subjected to GC analysis, and the sample generated a 0.175 peak area, what is the concentration of DDT in the sample? 3.12 ppm 4.02 ppm 5.09 ppm 1.65 ppm 3.75 ppm

A banned pesticide, DDT, is analyzed through gas chromatography. A DDT standard is diluted accordingly to generate 1.00, 5.00, 10.00, 15.00, 20.00, and 25.00 ppm standards. These standards generate peaks with peak areas of 0.100, 0.210, 0.295, 0.405, 0.510, and 0.600, respectively. If a nearby watershed sample is subjected to GC analysis, and the sample generated a 0.175 peak area, what is the concentration of DDT in the sample? 3.12 ppm 4.02 ppm 5.09 ppm 1.65 ppm 3.75 ppm

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

What mass of MgCl₂ 6H₂O is required to make a 0.200 dm³ stock solution containing 25.0 ppm Mg(II)? What volumes of this stock solution are required to make 10.0 cm³ standard solutions containing 5.00, 1.00 and 0.10 ppm Mg(II)?
ASAP: Please help me solve for Average Molarity of EDTA Standard Solution and Ca Titer (mg Ca/mL of EDTA Solution). Show step by step solution. This is the data. Please explain thoroughly as well.
Example: Calculation the weight of barium iodate Ba(IO3)2 if it dissolved in 500mL of distilled water (D.W) at 25 °C if M.wt of ppt = 487 g/mole and %3D Ksp= 1.57x10.
4- A sample containing H2C204 had a purity equal to 90.50% (w/w). An unknown mass of this sample was dissolved in water and transferred to a 50.00 mL flask. An aliquot of 25.00 mL was transferred to an erlenmeyer flask and 50.00 mL of a 0.2000 mol L^-1 NaOH solution were added. %3 Excess NaOH was titrated with 0.09000 mol L^-1 HCI solution using 2.000 mL. Calculate the mass (g) of the sample used. Data: H = 1.008 C= 12.01 O = 16.00
A 100 ml bottle of metronidazole 100 mg/ml suspension is available in your pharmacy. Calculate the volume of this suspension needed to be diluted with cherry syrup to prepare 60 ml of a 4% metronidazole suspension. 1 ml of a 1:1000 epinephrine injection was mixed with 20 ml of 1% lidocaine injection. Calculate the new ratio strength of epinephrine in the admixture. (IGNORE ANY VOLUME CHANGES AFTER ADMIXTURE) Instead of preparing 4 grams of tetracaine hydrochloride 4% gel an 8% gel was compounded by mistake. How many grams of the 8% gel and gel base must be mixed to get 4 grams of a 4% gel? How many milliliters of 70% ethanol and 20% ethanol must be mixed to prepare 500 ml of 30% ethanol? A diphenhydramine elixir contains 12.5 mg drug in one teaspoon. The volume of oral vehicle that is to be added to 100 ml of this elixir to reduce its strength by one half its original strength is; 6. 90 capsules of Liothyronine (T3) 15 micrograms are to be prepared. The formula calls for a 1:10000…
The percentage purity of a paracetamol sample was determined by a reversed phase HPLC method as follows: • A calibration curve of peak area versus concentration (ug/mL) of pure paracetamol was constructed The paracetamol sample for analysis was prepared by taking 10.0254 g of powder and dissolving it in IL of distilled water (solution A). 1 mL of the latter solution was further diluted to 1L with distilled water (solution B). Solution B was analysed by HPLC analysis Results • The equation for the best-fit line of the calibration curve is: y = 26811x – 1313.8 The average peak area for the paracetamol sample (solution B) was 266796.2 Calculate the percentage purity of the paracetamol powder.
Carboxylic acids, including fatty acids and benzoic acids, are often present inboth municipal and industrial effluents. Describe a sample preparationcombined with GC method for identification and determination of carboxylicacids in raw wastewater at ppb (µg L-1) level. Point out a suitable samplepreparation technique and GC conditions in details and give justifications foryour choice
Transfer 3-4 drops or a pinch of the test compound (Acetanilide) to 3 ml of the solvents, 5% NaOH and 5% HCL Shake the mixture thoroughly. The time required for the solute to dissolve in the solvent should not be more than 2 minutes. Indicate with (+) or (-) if the test compound is soluble or insoluble in the solvent. Is Acetanilide solube or insolube in 5% NaOH? _______ Is Acetanilde soluble or insolube in 5% HCL? _______
You were tasked to determine the percentages of citric acid in the freshly squeezed and bottled lemon juice. The following data were obtained. Freshly Squeezed lemon juice 13 Trials Volume of Titrant (ml) 1 25.5 Types of Lemon Juice Freshly Squezzed Bottled 12 25.5 25.5 Bottled Lemon juice 1 sate and submit. Click Saue All 18.5 Mass of 25 ml (g) 25.6 26.7 12 18.3 13 18.3 Given that the molarity of NaOH is 1.10 M (after standardization with KHP), determine the mass of citric acid in the Freshly squeezed lemon juice (8) 15°C
A solution contains 0.10 M Sr(NO3)₂ and 0.20 M Bi(NO₂). When solid Na AsO is added to the solution a precipitate forms. What concentration of AsO ³ maintains maximum separation of Sr²+ and Bi³+? Ksp of Sr₂(AsO₂)₂ = 4.29 x 10-1⁹ and BIASO = 4.43 x 10-1⁰ 4 4/2
Calculate : 1)Mean Experimental solubility of calcium hydroxide 2)standard deviation 3)RSD(pph)
A tea bag containing 15 grams of tea leaves with 0.7% of caffeine was used in solid-liquid extraction with 200ml of distilled water followed by liquid-liquid extraction using DCM. If 50.0mg of caffeine requires 10 ml of water and 3.0ml of DCM to be dissolved, how much caffeine can be extracted using 70.0ml of DCM? a. 4.8 x 10^-2 b. 5.7 x 10^-2 c. 3.8 x 10^-3 d. 5.8 x 10^-3