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Suppose that 1.331 g of impure barium hydroxide is dissolved in enough water to produce 250. mL of solution and that 35.0 mL of this solution is titrated to the stoichiometric point with 17.6 mL of 0.0935 M HCl(aq). What percentage of the impure sample was barium hydroxide?
The vapor pressure of pure water at 25 degrees Celsius is 28.3 mmHg. Estimate the mass in grams of KCl needed per liter of pure water to reduce the vapor pressure of water at 25 degrees Celsius by 5%.
It decomposes into its elements. Write the balanced equation for this reaction. If 71.8 g of Hgo is decomposed, calculate the volume of oxygen at STP
boyles apprentice observes that the air trapped in air tube occupies 24.8 cm3 at 1.12 atm.by adding mercury to the tube
The solubility of barium sulfate varies with the composition of the solvent in which it was dissolved. In which solvent mixture would BaSO4 have the lowest solubility
compound of carbon and oxygen contains 3.00g of carbon and 8.00g of oxygen, what is the mass percent of carbon in the compound?
The outdoor concentration of radon is 1 pCi/L. Develop a mass balance for this problem and estimate the steady-state radon concentration in the crawl space (in pCi/L).
How many grams of NaCl are contained in 350. mL of a 0.103 M solution of sodium chloride?
Draw the structure for thin layer chromotography? what is it melting and boilng point, density, molecular weight and strucural formula
A machine does 300.0 kJ of work on the environment, and emits 200.0 kJ of heat. What is the change in internal energy of the machine?
In the titration of ascorbic acid with potassium iodate in the presence of potassium iodide, what happens when an excess of potassium iodate
List the penicillins that are classified as extended spectrum and relate their structure to their activity as well as their acid and ß-lactamase stability and potential side effects.
Using the reactions below, write out the chemical expression for the fraction of all species that would be [Sn2+] (note this form does not need to be solved for K values, just the compounds themselves).
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