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calculate the grams of silver produced by the decomposition of 5.91g of silver oxide
2 Ag2O --> 4Ag + O2
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- The gravimetric analysis of a 11.432-gram sample of silver ore yields 4.918 grams of silver iodide [MW=234.77 g/mole]. Determine the percent by weight of silver metal [At.Wt. = 107.868 g/mole] in the ore.List all of the possible mole ratios in the decomposition of silver oxide. 2Ag2O→4Ag+O2An aqueous magnesium chloride solution is made by dissolving 5.60 moles of MgCh in sufficient water so that the final volume g of the solution is 2.70 L. Calculate the molarily of the MECh solution.
- How many liters of chlorine gas at 0.80 atm and 25°C can be produced by the reaction of 6.0 moles of HCl in solution with excess MnO2?One method of removing CO2(g) from a spacecraft is to allow the CO2 to react with LiOH. 2LiOH(s)+CO2(g)→Li2CO3(s)+H2O(l) How many liters of CO2(g) at 23.6 ∘C and 1.00 barr can be removed per 9 kg of LiOH consumed?What is the optimum pH for coagulation with Fe2(SO4)3? Briefly explain why.
- A 1.1324 g sample of magnetite ore was dissolved in concentrated HCl to give a solution that contained a mixture of Fe2+ and Fe3+. Nitric acid was added and the solution was boiled for a few minutes, which converted all of the iron to Fe3+. The Fe3+ was then precipitated as Fe2O3*xH2O by addition of NH3. After filtration and washing, the residue was ignited at a high temp to give 0.5394 g of pure Fe2O3. What is the percent Fe and the percent Fe3O4 in the sample?What volume of 0.200 M NaOH is necessary to neutralize the solution produced by dissolving 2.00 g of PCl3 is an excess of water? Note that when H3PO3 is titrated under these conditions, only one proton of the acid molecule reacts.(i) Name the method of refining of metals such as Germanium.(ii) In the extraction of Al, impure Al2O3 is dissolved in cone. NaOH to form sodium aluminate and leaving impurities behind. What is the name of this process?(iii) What is the role of coke in the extraction of iron from its oxides?
- Explain the role of each of the following :(i) NaCN in the extraction of silver(ii) SiO2 in the extraction of copperWhat mass (in grams) of Na2S2O3 is needed to dissolve 0.44 g of AgBr in a solution volume of 1.0 L, given that Ksp for AgBr is 3.3×10−13 and Kf for [Ag(S2O3)2]3− is 4.7×1013?Calculate the number of moles of H2O that will be produced by the reaction of 1.46 mole of solid Mg(OH)2 with excess aqueous HCl.