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- How many grams of Chromium (III) oxide are produced with 2.0g of ammonium dichromate? (balanced equation: (NH4)2Cr2O7 -> Cr2O3 + 4H2O + N2)A 0.4044 g solid organic sample containing covalently bound bromide and no otherhalogens was placed in a porcelain crucible with about one gram of fresh sodium metal. Ina process known as sodium fusion, the mixture was heated in a furnace to 450°C whichcharred and vaporized the organic portion of the molecule and converted the covalentbromide into sodium bromide. Excess sodium was decomposed by adding small portionsof water which also dissolved the sodiumbromide. The clear solution was quantitatively transferred to a beaker, acidified with dilutenitric acid, and diluted to about 50 mL. A 6 mL quantity of 0.1 M AgNO₃ was added to thesolution andthe mixture heated to about 60°C for an hour to age and digest the precipitate. After filtering,the mass of the silver bromide produced was determined to be 37.8 mg. What is thepercentage by mass bromine in the organic compound? (Ag=107.868, N=14.0067,O=15.9994, Br=79.904)formula for a compound is given as C₂H₁₂O₆. This is a (an)
- If cobalt(II) sulfate is heated too strongly, the following reaction will occur CoSO4(s) à CoO(s) + SO3(g) If you are heating a sample of CoSO4·6H2O and this reaction occurs along withdehydration, what will happen to the experimental percent water? Explain your answer.The nurse needs to prepare a medicine that would help the x-ray images of the gastrointestinal. What chemical test would the nurse perform to determine whether the barium compound to use is BaSO4(s) or BaCO3(s)?Consider the series of reactions to synthesize the alum (KAl(SO4 )2 · xH2O(s)) from the introduction. (a) Assuming an excess of the other reagents, from one mole of aluminum Al (s), how many moles of alum will be produced? (b) Assuming an excess of the other reagents, from one mole of potassium hydroxide KOH, how many moles of alum will be produced? (c) Assuming an excess of the other reagents, from one mole of sulfuric acid H2SO4 , how many moles of alum will be produced? (d) If you start the synthesis with 1.00 g of Al, 40.0 mL of 1.50 M KOH, and 20.0 mL of 9.00 M H2SO4 , which of the three will be the limiting reagent? (e) Assuming that the product is anhydrous (that there are no waters of hydration), calculate the theoretical yield of alum, in grams, based on the amounts of reagents in part (d). 3. Consider the nickel salt: (NH4 )2Ni(SO4 )2 ·y H2O (Ammonium Nickel Sulfate Hydrate), where y is the number of coordinated waters. (a) Assuming that the product is anhydrous (y = 0),…
