A 20.0 mL sample was analyzed using the Mohr method. Calculate the percent (w/v) CI (FM = 35.45) if 25.00 mL of 0.1234 M AgNO3 was used to form the yellow-orange endpoint. O 35.9% O 5.47% O 2.19% O 0.547%
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- The mercury content of a stream was believed to be above the minimum considered safe —1 part per billion (ppb) by weight. An analysis indicated that the concentration was 0.68 parts per billion. What quantity of mercury in grams was present in 15.0 L of the water, the density of which is 0.998 g/ml? ( 1ppbHg=1ngHg1gwater)When 85.0 mL of 0.250 M Ba(OH)2 solution is added to 85.00 mL of 0.250 M Al (NO3)3 solution, a white gelatinous precipitate of Al(OH)3; is formed. Assuming 100% yield, (a) what mass (in grams) of Al(OH)3 is formed? (b) what is the molarity of each of the ions Ba2+, OH-, Al3+, NO3- in the resulting solution?Silver ions can be found in some of the city water piped into homes. The average concentration of silver ions in city water is 0.028 ppm. (a) How many milligrams of silver ions would you ingest daily if you drank eight glasses (eight oz/glass) of city water daily? (b) How many liters of city water are required to recover 1.00 g of silver chemically?
- Perform these calculations for nickel(II) carbonate. (a) With what volume of water must a precipitate containing NiCO3 be washed to dissolve 0.100 g of this compound? Assume that the wash water becomes saturated with NiCO3(Ksp=1.36107). (b) If the NiCO3 were a contaminant in a sample of COCO3(Ksp=1.01012), what mass of COCO3 would have been lost? Keep in mind that both NiCO3 and COCO3 dissolve in the same solution.A mixture of xenon and ?uorine was heated. A sample of the white solid that formed reacted with hydrogen to yield 81 ml of xenon (at STP) and hydrogen ?uoride, which was collected in waiter, giving a solution of hydro?uoric acid. The hydro?uoric acid solution was titrated, and 68.43 mL of 0.3172 M sodium hydroxide was required to reach the equivalence point. Determine the empirical formula for the white solid and write balanced Chemical equations for the reactions involving xenon.Empirical formula is 6C. % of Sulphur= [S] x 100 S0.0- yd ebivic 32 x 100% = 50%m %3D [1 (32) +2(16)] (CH,)n=2x42 [Hint: M,= 2x V.D] (12+2)n=84; n=6; hence compound is C,H,2 Mg + 2HCI → MgCl, + H, 7A. 8. From the equation: alumoeluaalch = slumot leohioma 1mol Mg produces 1mol H, Or 24g Mg produces 22.4dm' H, ei sid 9B. Compare Q57 n negyoro lo on lsic CHAPTER 3 eo to easm yd. THE ATOMIC STRUCTURE. ELECTRONIC CONFIGURATION. PERIODICITY OF ELEMENTS. - The periodic classification of the elements is an arrangement of the elements in order of their A. atomic weights B. isotopic weights C. molecular weight D. atomic numbers E. atom masses (1978:Q5) SD . The nucleus of an atom contains A. protons only B. neutron only C. protons and electrons D. neutrons and electrons E. protons and neutrons not iso(1978:Q28) - The size(diameters) of five atoms are in order Rb My Questi x Co. How to Ca X N NSU Login X PeriodicTa X M Action Re x 0 mySigTau XG 4.25 ml to X ( NBA FinalX G scientific X + enow.com/ilrn/takeAssignment/takeCovalentActivity.do?locator%3Dassignment-take [References] A 1:1 mixture by moles of nitrous oxide and oxygen is often used as a sedative in dentistry. If the total pressure of this mixture in a cylinder is 3.75 atm, what is the partial pressure of each gas? Partial pressure of nitrous oxide = atm Partial pressure of oxygen = atm Submit Answer Try Another Version 3 item attempts remaining Previous Next Email Instructor Save and Exit Cengage Learning | Cengage Technical SupportFrom 0.8 av. lb of 20% w/w KOH solution, 72.6 O 121 142 86.2 Next g of 12 percent w/w KOH may be produced.70 alll ll ? ..::0E is اجابة قصيرة A solution of Al2 (S04) 3 at a concentration of 0.3 N , What is the volume needed to prepare a solution at a concentration of 0.04 M in a volume of 150 ml of distilled water إجابتك كتب إجابتك. . ise 6.30 L of 0.262 M NaOH from the concentrated commercial reagent [50% NaOH (w/w), sp gr 1.525]. Take mL of the concentrated reagent and dilute to 6.3 L with water. f 3.90 L of a solution that is 16.0 ppm in K*, starting with solid KĄ Fe (CN),. Dissolve mg K4 Fe (CN)6 in enough water to give a final volume 9, of 3.9 L.Agency TEXAS UNITED REALTY Real Estate 75 g u cup increases by 2.44 70 V the heat change per mole of Cich dissolved in water Assame that all the heat is absorbed ed E. D 1 15) When aqueous solutions of Pb(NO3)2 and NaCl are mixed, PbCl2 precipitates. The balanced net ionic equation is: O to slom to slom I asdW (SC flot sdi of gaibros (2)OsH bas (2)5¹1 mot Pb2+ (aq) + 2C1- (aq) → PbCl2 (s) prisupe Pb2+ (aq) + 2NO3- (aq) → Pb(NO3)2 (s) H Pb2+ (aq) + 2NO3- (aq) -> Pb(NO3)2 (aq) Pb(NO3)2 (aq) + 2NaCl (aq) → PbCl2 (aq) + 2NaNO3 (s) laubonA silver nitrate solution contains 29.53 g of primary standard AGNO3, in 1.00 L what volume of this solution is needed to react completely with 50.00 mL of 0.01808 M Na,S. 1. O10.40 mL 2. O20.79 mL 3. O6.10 mL 4. O12.31 mL 5. O18.21 mLSEE MORE QUESTIONS
