Volume of Sample Taken, 4 μM Pb2+ 20 0 50 5 Reagent Volumes Used, mL Absorbance, A, 545 nm Ligand 20 water 10 0.2 20 5 0.8 Calculate the concentration of lead in the sample.

TWhat is the n Okalic acid (HacaDy &H20) in 250 mL of Solution darity Of lan30X10 of 7 प्च त5 8 28

How many mL of o.677m HBrias needed to camputely of Naz cOg? nectralize 0.8989 Nan co, +2 HBr-> Ha COz + 2 NaBr -7- 3 3

A solution was prepared by dissolving 1210 mg of K3Fe(CN)6 (329.2 g/mol) in sufficient water to give 785 mL. Calculate b) the weight/volume percentage of K3Fe(CN)6, the number of millimoles of K+ in 35.0 mL of this solution, and the ppm of Fe(CN)63-

Antiderivatives - X W 4.7 Homework-Optimization - M X 1/outline/assessment/_452520 1/overview/attempt/_1748964 1?course 1P Question 9 Choose the correct option The concentration of aqueous solution of urea (CN2H4O) is 2.577 m. Find the concentration of the solute in solution in ppm. a)1.339 x10 5 ppm b) 2. 236 X105 ppm c) 1.567 x10 5 ppm d) 1.235 X105 ppm e) 1.432X105 рpm E Past due. This attempt will be submitted late. e Type here to search 近

What volume in mL of 4.35 M HCI solution is needed to react with 18.5g of Ca(0H)2

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tGPT translate Google Search X C Which of the statements bel X oads/att.epCqDCR-ol0GROgrwWy0F2UVDmra3oKTRAHPREHOKQ.pdf OKTRAHPREHOKQ.pdf 20/60 150%+ 15. Njehsoni pH e një tretësire 0,010 M CH3CO2H. Ka = 1,8 x 10-5 për acidin acetik. A) 9.26 B) 3.39 C) 2.02 D) 10.61 E) 4.74 Përgjigje: B 16. Njehsoni fortësinë jonike të një tretësire 0.210 M FeCl2. Përgjigja: 0.630

A student determined the concertration of NaOCI in a commercial bleach sample using the same technique described in section "F" of the Halogens and Their Compounds lab. The student required 18 drops of 0.01M Na25203 to reach the end point. What is the concentration (reported in percentage) of NaOCI in the bleach sample?

1. A solution is known to contain 38.04 ± 0.03 mM KCl, and you have taken an aliquot of this solution using a pipette calibrated to deliver 20.013 ±0.006 mL. Determine the number of moles of KCl that are delivered in the aliquot, including the absolute uncertainly in that value. 2. You deliver the aliquot taken in problem 1 into a volumetric flask with a volume of 250.00 mL ± 0.02 % and dilute the solution to volume in the flask using Dl water. What is the concentration of KCl in this flask, report your answer with the absolute uncertainty. 3. Tabulated below are replicate titration volumes for an analysis. What is the error (both absolute and percent) for the average titration volume?