N 1 on 6. How many grams of KMnO4 are needed to prepare 75.0 mL of 0.350 M KMnO4? (4 pts.) r 2 W S X H cmd # 3 E D C $ 4 R F V % 5 T G < C B Y H & 7 U N * 00 8 1 i J D M K 9 O H I O 18 L P V I
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- Lead poisoning has been a hazard for centuries. Some scholars believe that the decline of the Roman Empire can be traced, in part, to high levels of lead in water from containers and pipes, and from wine that was stored in leadglazed containers. If we presume that the typical Roman water supply was saturated with lead carbonate, PbCO3 (Ksp = 7.4 1014), how much lead will a Roman ingest in a year if he or she drinks 1 L/day from the container?95. Many metal ions form insoluble sulfide compounds when a solution of the metal ion is treated with hydrogen sulfide gas. For example, nickel(II) precipitates nearly quantitatively as NiS when H2S gas is bubbled through a nickel ion solution. How many milliliters of gaseous H2S at STP are needed to precipitate all (he nickel ion present in 10. mL of 0.050 M NiCl2 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?
- 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. . is5 mg/mL 10 mL Example g/L Calculate the concentration of potassium ion in grams per liter after mixing 100 mL of 0.250 M KCI and 200 mL of 0.100 M K2SO4. (At.wt. K is 39.1 g/mol) NOE Alth Solution COD0,500 of Nacl containing scmple weigh 25ML of cund treat with 0.1086 M mpNO3 sowhen. The remaning nou? rs 11.3mL of ol010 M KSCN. HOW many Nacl tArated with found m the sample? Find mass percantape NOu M the Sample ? CNOCI =58.5 plmol)
- 5. A solution containing 15 mmole of CaSO, is diluted to 250 mL. The number of milligrams of CasO4 2H;0 per ml of the final solution is (Atomic weights: Ca 40, S =32, 0 = 16, H = 1):many grams of Anilin GHs NH2 Should be Solved in water to Prefare dow a Solution of I liter containg oH iong Know that Kb (AnilWhe)=4*/0 with -6 2* 10 -1050.0 ml of 0.0350 M K2Cro4 were mbxed with 40.0 mL of 0.0150 M Pb(NOah Pb(NO32+ K2Cro4→PbCro4+ 2KNO3 Which reactant was the limiting reagent? A. KNO3 OB. Pb(NO32 C.KCrO4 O D. None, the reactants are in equal molar amounts OE. PbCro4
- What is the concentration of a solution made by diluting 85 mL of 6.0 M HCl to a final volume of 750 mL? concentration: J $ 4 R F F4 V % 5 T G B ^ 6 MacBook Air Y H & 7 N B U J * 8 M MOSISO DII FB K 9 H DD FO O ) O L command A F10 P A. 1. option 4 F11 L ? + f F12 M delete retForeattt part of iTIS qtestfoni; tonsider FOHOWIHg Btetat: You need to make a stock solution of Ca( C2H3O2 )2 with a concentration of 6.50 M. You have a 850.0 mL volumetric flask available to make this stock solution in. You are then tasked with using this stock solution to prepare a sample for use in an experiment. The experimental sample should have a final volume of 15.0 mL and a concentration of 0.350 M Ca(C2H3O2)2. a) What is the molar mass of Ca(C2H3O2)2? b) How many moles of the solute would be needed to create the stock solution using the volumetric flask available? c) How many grams of the solute should be added to the volumetric flask to create the stock solution? d) What volume, in mL, of the stock solution should be used to prepare the experimental solution through dilution? US 目 MHow many liters of a 3.55 M KCl solution contain 45.8 g of KCI? Molar mass of KCI = 74.55 g/mol Llist. This is a tw crosoft olga gamboa Bobby Offer Edge retirement a... of Employ... f1 ? Lascaux Cave chemistry Bobby Offer Painting and reaction of Employ... 86°F Sunny f2 f3 V f₁ tic