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Subject :- Chemistry
How many grams of EDTA (336.21g/mol) are contained in 1mL of a 2000microM solution?
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- You are given 25 mL of a Red #40 Allure Red food stock solution of a concentration of 2.02 x 10-5 M. The molecular weight of the allura red is 496 g/mol. You use the lab equipment available to make 5 dilutions of the stock solution. A. Determine the volume of stock solution required to make 5.00 mL of the diluted solutions the desire concentrations are (Picture of table included) B. The absorbance of each dilution is also given in the table prepare a beer's law plot and attach. Then determine the concentration of an unknown solution of allura red if the absorbance is found to be 0.436.17) An unknown hydrocarbon compound was analyzed for hydrogen by elemental analysis and results show that it contains 15.88 % H. What is the empirical formula? A) C,H, B) CgH18 C) C12H27 18) What is the concentration in ppm of a 3 70 L solution (d = 1.00 g/ml) containing 4 21 x 10:7 ka of the pesticideCalcium in a 255-µL serum sample is titrated with 0.0002379 M EDTA solution, requiring 5.6 mL. What is the calcium (40.078 g/mol) concentration in the blood sample in mg/dL?
- What is the concentration of a solution with an absorbance of 0.23 a.u. in ppm when y=45.3509ye teaching and lear X H /ilm/takeAssignment/takeCovalentActivity.do?locator=assignment-take Paraphrasing Tool - QuillBot Al 8 Submit Answer & [Review Topics] [References] Use the References to access important values if needed for this question. How many grams of calcium acetate, Ca(CH3 COO)2, must be dissolved to prepare 250. mL of a 0.223 M aqueous solution of the salt? Q Search U * 8 Retry Entire Group K - C hp KA CJHLUSS Pura LSI dete TUF Ls que X O 8 more group attempts remaining 110 ►ll P PAI Mod 112 [ ✈ + 11 ins + prt sc 1 delete 4 backspace ^O64) O enter home num lock 7 home 4 ✰ ☐ end 3:37 PM 5/21/2023 004 A pg up 1/ 07 * X MEN pg dn 9 pg up COT +What is the concentration in parts per million of DDT for 0.040mg in 1240 plankton?
- Calculate and compare the number of strands of PVA in 1.00 L of 4% PVA and the number of tetrahydroxyborate ions in 1.00 L a 4% solution of borax. Group of answer choices A:Borax has more strands than PVA B:Borax has approx. 409 more ions than PVA strands C:PVA has approx. 409 more strands than Borax ions D:Borax has approx. 209 more ions than PVA strands9 and lear X + keAssignment/takeCovalentActivity.do?locator-assignment-take Submit Answer O If 20.7 grams of an aqueous solution of manganese(II) bromide, MnBr₂, contains 2.86 grams of manganese(II) bromide, what is the weight/weight percent of manganese(II) bromide in the solution? Weight/weight percent= % MnBr2 Q Search [Review Topics] [References] Use the References to access important values if needed for this question. fg Retry Entire Group 9 more group attempts remaining LP-CONdugau fg 144 np f10 ▶H ►►I f12 ✈ + ins prt sc 12 ☆ 100 06 64 0 delete home 57how would you prepare 200ml of a 3/4 strength hydrogen peroxide solution for a wound irrigation using normal saline as a diluent, if you have full strength hydrogen peroxide available?
- a Ingilizce v An AGNO3 solution with NaCl equivalent of 5,972 mg / ml is used as a titrant in volumetric analysis. a) Find the normality of this solution. b) 0,2158 g NaCl for example 31,47 ml consumption in titration with AGNO3 with normality in a Calculate the amount and percentage of chloride in the sample (Na 23 g/mol, Cl: 35.5 g/ mol)How much of the preservative is needed to prepare a 120-mL preparation of Aluminum hydroxide gel based on this formulation? Ammonium alum 800 g Sodium carbonate 1000g Peppermint Oil 0.01% (0.01 g/100mL) Sodium benzoate 0.1% (0.1 g/100mL) Purified water, qs ad.2000 mL a. 0.12 g b. 60 g c. 48 g d. 0.012 g1. A solution contains 480 mg/l of FeC13; temperature is 15 C. a) What is the TDS of this solution? b) What is the approximate conductivity of the solution in micromhos/cm? Remember: TDS (Total Dissolved Solids) is the summation of concentration all the ions in the solution. Use the equation for the relationship of TDS and Conductivity in the slides to calculate the conductivity. 2. Historically, in the United States, the prevalent water-born infectious diseases have been typhoid, cholera, and dysentery. How have these diseases been virtually eliminated? Currently, the prevalent infectious diseases are giardiasis and cryptosporidiosis, causing diarrhea that can be life-threatening for persons with immunodeficiency syndrome. What actions are being taken to reduce the probability of waterborne transmission of these diseases? 3. Can a person be infected with Covid-19 through drinking water? 4. Can a person be infected with HIV through drinking water?