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A sample of calcium metal is contaminated by a certain amount of highly toxic, radioactive thorium metal (Th). A 10.00-gram sample of this mixture is dissolved in acid, and reacted with excess sodium oxalate to form a precipitate which is a mixture of calcium oxalate, CaC2O4, and thorium oxalate, Th(C2O4)2. The total mass of this precipitate is 31.03 grams. Determine the mass of each metal in the original 10.00-gram mixture.(Show all your work including calculation.)
A 100g sample of water at 27oC is poured into a 76.2g sample of water at 89oC. What will be the final temperature.
A pressure-measuring device indicates that the blood pressure of a normal person oscillates between 120mm Hg (at the peak of the heartbeat) and 80mm Hg (between heartbeats).
A flask contains 0.230 mols of liquid bromine Determine the number of bromine molecules present in the flask.
Calculate w (in kJ) when 566 g iron (III) oxide (MM = 159.7 g/mol) reacts with excess carbon to produce carbon dioxide gas at 332 K: 2Fe2O3(s) + 3C(s) ? 4Fe(s) + 3CO2(g)
The normal boiling point of the liquid is 425 K. Liquid, X, and Y are all in equilibrium at 342 K and 1800 bar. Tc = 571K, Pc= 46 bar
A first order reaction has a rate constant of 0.210 at 25 oC and 4.91 at 42 oC. Calculate the value of the activation energy in KILOJOULES
If you are given a 0.25 g piece of sodium metal to react with water, how many moles of HCl would it take to neutralize the sodium hydroxide produced
Draw the resonance structures for 9-(hydroxymethyl)anthracene. Is it possible for all three rings to simultaneously have benzenoid character
The difference between the energy of the products and the energy of the reactants D. Undefined because it depends on whether the reaction is endothermic or exothermic
A racquetball court is 20 ft wide. If we consider only motion along this direction and treat the ball as a particle in a box, if the ball weighs 1.4 ounces, what quantum number corresponds to a racquetball hit 100 km per hour and what speed would ..
Lithium Crystallizes in a body centered cubic unit cell what is the mass of one unit cell? Report answer in grams
At what tempature should 0.5 moles of nitrogen be held to maintain a pressure of 125 kpa in a 1.0L closed sealed container
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