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Samples of hydrated manganese perchlorate are heated to determine the amount of crystal water:Mn(ClO4)2·nH2O ! Mn(ClO4)2 + nH2OTwo samples of different weight are studied:a) m (before heating) = 1.629 g ; m (after heating) = 1.142 gb) m (before heating) = 9.048 g ; m (after heating) = 6.645 gFor both samples, calculate the number of moles of crystal waterper formula unit of manganese perchlorate. Decide which sample is most likely to represent the correct result, and explain what might have gone wrong with the other.
A compounds H NMR spectrum shows a resonance at 5.47 and 3.49 ppm. What possible structural subunit does the compound contain
question photoionization of a diatomic molecule produces a singly charged cation. for the molecules no calculate the
A saline solution used in intravenous drips for patients who cannot take oral fluids contains 0.92% (w/v) NaCl in water. How many grams of NaCl are contained in 729 mL of this solution.
What proportions of ethanol and water should be mixed in order to produce 100 cm3 of a mixture containing 50 percent by mass of ethanol.
Molten carbonate fuel cells fueled with H2 convert as much as 60% of the free energy released by the formation of water from H2 and O2 into electrical energy. Determine the quantity of electrical energy obtained from converting 1 mole of H2 into H..
A certain metal has a density of 10.2 g/cm3 at 25C. it crystallizes in a body-centered cubic arrangement with a unit cell edge length of 314.7 pm. determine the atomic weight.
When ammonia is added to nickel ions in aqueous solution, the water molecules bound to the Ni2+ are replaced by ammonia molecules.
What is the theoretical yield of bromobenzene in this reaction when 30.0 g of benzene reacts with 65.0 g of bromine?
Show how all four hydrogens in sodium borohydride can act as a reducing agent hydride. What is the minimal amount of NaBH4 is needed for reduction of 1 mole of aldehyde.
How would the stereochemical outcome of the bromination reaction differed if we would have started with cis-cinnamic acid
Bromine is larger than chlorine however the equilibrium constant indicates that a chloro substituent has a greater preference for the equitorial position than a bromo substituent does. Propose an explanation for this fact.
If I have 5.00 g of Mg(OH)2, what volume of 0.1234 M HCl would i require to completely neutralize the magnesium hydroxide
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