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Compound A has a solubility of 18 grams per 100 grams of water at25 Celsius. Cooling a saturated 200 g solution of compound Afrom 84 celsius to 25 celsius results in a precipitation of 19grams of the compound. Calculate the solubility of compound Aat 84 celsius.
Consider a metal atom, which we will give the symbol M. Metal M can readily form the M+ cation. If the sphere on the left below represents the metal atom M, which of the other three spheres would probably represent the M+ cation? Explain your choi..
The drying oven, although thought (and assumed) to be set at 125 degrees C, had an insie temperature of 84 degrees C. How will this error affect the reported percent by mass of the limiting reactant in the salt mixture
A 20 mg sample of a compound is dissolved in 5.0 ml of water and extracted with 2.5 mL of heptane. After separation of the layers, the heptane layer is found to contain 15 mg of the compound. What is the partition coefficient of the compound, Khep..
she measures the freezing point of the solution to be 2.7 oC; that of pure cyclohexane is 6.5 oC. cyclohexane has a Kf of 20.2 oC/m. caclculate the molar mass of the compound
The streams are labeled as follows: 3 - boiler to turbine 1; 4 - turbine to reheat; 5 - reheat to turbine 2; 6 turbine to condenser; 7 condenser to pump; 8 pump to boiler. Determine the following
A mixture of CaCO3 and CaO weighing 0.698 g was heated to produce gaseous CO2. After heating, the remaining solid weighed 0.434 g. Assuming all the CaCO3 broke down to CaO and CO2, calculate the mass percent of CaCO3 in the original mixture.
The Ksp value for ferrous hydroxide is 1.6 x 10/\-14. Calculate the molar concentration of ferrous ion (Fe2+) in an aqueous solution that has been buffered to maintain a pH of exactly 10.00 and is saturated with Fe(OH)2.
How many milliliters of a stock solution of 10.8 M HNO3 would you have to use to prepare 0.500 L of 0.410 HNO3? Unit of the answer should be in mL.
Colligative properties are independent of the type of electrolytes in solution. suppose that in a solution system, a semipermeable memebrane is used to separate a sucrose-water solution from its pure solvent, water
Gaseous hydrogen iodide is placed in a closed container at 425 , where it partially decomposes to hydrogen and iodine: 2HI(g) is at equilibrium H2(g)+I2(g). At equilibrium it is found that HI is 3.52×10-3 ,H2 is 4.78×10-4 , and I2 4.78×10-4.
you have 500 ml of a buffer solution containing .2 m ch3cooh and .3 m ch3coona. what will the ph of this solution be
Someday, cars may be powered by clean H2/O2 fuel cells and electric motors. Under standard conditions, such a fuel cell can develop 1.229 volts. If the oxygen is obtained from air (at P=0.21 bar), what pressure of H2 would be required to develop 1..
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