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Talc is a magnesium containing mineral commonly found in soapstone. You have a 15.0g sample of soapstone and you completely dissolve in solution. A 10.0 mL fraction of that solution is added to a 250 mL volumetric flask and diluted to the mark with 8-hydroxyquinoline solution to form a magnesium complex which precipitates (reaction shown below). If you collect 631 mg of complex, what was the % mass of talc in the soapstone?
Mg2++ 2C9H7NO --> Complex + 2H+
Calculate the number of moles of gas in a 3.24 L basketball inflated to a total pressure of 24.3 psi (pounds per square inch) at room temperature (25 degrees Celsius).
What is the limiting reagent in the reduction of C10H16O with NaBH4 assuming you initiate it with.1 g of sodium borohydride and .1 g of camphor?
Carbon and silicon belong to the same group and are known to have similar properties. Do you think that silicon can replace the role that carbon plays in organic chemistry
A reaction has a rate constant of 0.0810 sec-1, how much of the compound (in mol/L) is left after 0.752 min, if there was 0.303 mol/L at the start
Calculate the concentration of CO2 in champagne at 20 °C if the partial pressure of carbon dioxide is 5.0 atm and the Henry's law constant for CO2 is 0.023 mol·L-1·atm-1
a steel cylinder holds 1.60 g of ethanol c2h5oh. what is the pressure of the ethanol vapor if the cylinder has a volume
A corrosionist pipetted a 50.00 ml sample of an unknown brine and titrated it with 37.64 ml of 0.1024 M silver nitrate solution. Calculate the ppm of salt (NaCl)in the sample.
If 3 moles of NaCl are needed to produce 1 mole of AlCl3, how many grams of NaCl are needed to produce 200 grams of AlCl3? Show all of your work/calculations.
You made a pH 10 buffer by combining 142 mL of 28% NH4OH with 17.5 g NH4Cl. What would have been the pH of the buffer if you had used twice the amount of NH4Cl
In a particular solution, [Cr3+]=3.9x10-4 mol/L. What is the minimum pH at which Cr(OH)3(s) will precipitate from this solution. Assume the temperature is 25oC. For Cr(OH)3(s)
The cup is a volume widely used by cooks in the U.S. One cup is equivalent to 237 cm^3. If 1 cup of olive oil has mass of 216 g, what is the density of olive oil in g/cm^3?
00,000 gallon spill of 10 M HCL into 379,000 L lake. Carbonate alkalinity = 150 mg/L CaCO3. Initial pH of lake is 7.50. What is the new pH of the lake after the spill?
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