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An unknown metal hypochlorite salt, M(ClO)2, is subjected to analysis by iodometric titration: the salt is dissolved in dilute sulfuric acid, treated with excess aqueous KI, and then titrated with Na2S2O2 in the same manner as in your experiment. The unknown metal ion (M^2+) is completely uncreative in the titration. However, all of the hypochlorite ion bonded to the metal reacts completely with Na2S2O2. Iodometric titration of an acidified 0.0499 g sample of M(ClO)2 required 28.42 ml of 0.05521 mol/L Na2S2O2 to reach the equivalence point. What it the identity of metal M?
A mixture of NaCl and NaBr has a mass of 2.05 and is found to contain 0.72g of Na. What is the mass of NaBr in the mixture?
A solution is 21.0% ethylene glycol (C2H6O2) solution in water with density of 1.02g/mL. WHat is the molarity?
Which of the following would be expected to be colored?
A 275.0 mL sample of O2 is collected over water at 60.0 degrees Celsius. The total pressure is 755 torr. What is the volume of the O2 at STP? (The vapor pressure of water at 60 degrees Celsius is 149 torr)
A woman requires taking ibuprofen twice daily in 625mg amount. Each pill in the bottle is 250 mg then determine the number of pills the woman requires to consume each time she needs 625mg dosage
For an ensemble consisting of a mole of particles having two energy levels separated by 1000. cm-1, at what temperature will the internal energy equal
A 43 kg person drinks 450. g of milk, which has a "caloric" value of approximately 3.0 kJ/g. If only 17% of the energy in milk is converted to mechanical work, how high (in meters) can the person climb based on this energy intake.
Complete and balance the equation for this reaction in basic solution. Phases are optional.
What is the molarity of the carbonate ion in sodium carbonate, Na2CO3, prepared by dissolving 3.5 g of sodium carbonate in enough water to form 0.800 L of solution?
A cube of osmium metal 1.500cm on a side has a mass of 76.31g at 25°C. Calculate the mass of 0.1500L of benzene at this temperature.
If 5 mL of the original unknown sample was diluted to 200 mL prior to analysis, what is the concentration of Li+ in the original solution?
Explain why the element bromine prefers to have its two atoms form covalent bonds rather than ionic bonds
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