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100.0 mL of 1.020 M HCl and 50.0 mL of 2.040 M NaOH, each at 24.53ºC, are mixed in a Styrofoam cup calorimeter. What is the final temperature of the mixture if the heat of acid-base neutralization (?Hneut) = ?57 kJ per mole of H2O formed? (Assume density of the solution = 1.00 g/mL and specific heat of the solution = 4.184 J/g•ºC, and assume an insignificant heat capacity of the Styrofoam cup)
What is the molality of a solution consisting of 3.43 mL of carbon tetrachloride (CCl4; d=1.59 g/mL) in 78.4 mL of methylene chloride (CH2Cl2; d=1.33 g/mL)
Calculate the solubility of calcium oxalate in plain water and the concentrations of calcium and oxalate ions in a 0.010 M Ca(NO3)2 solution
use the appropriate standard reduction potentials to calculate the value of K at 25 degrees Celcius for:
A graduated cylinder contains 133 of water. A 10.0 piece of iron (density = 7.86 ) and a 16.0 piece of lead are added. What is the new water level in the cylinder?
Titrate 80ml of NH3 w/35ml of 0.30M HCl. Find pH and select an indicator beside bromocresol green that can be used.
It is desired to inflate a baggie with a volume of 959 milliliters by filling it with hydrogen gas at a pressure of 0.544 atm and a temperature of 284 K. How many grams of H2 gas are needed?
The Ni2 extracted from the column was treated witn 25.00 mL of 0.05804 M EDTA. How many milliliters of 0.02282 M Zn2 is required for the back titration of the Ni2 solution?
What is the concentration of the HNO3 solution? Your response differs from the correct answer by more than 10%. Double check your calculations. M (b) How many moles of NaOH were in excess after the first addition?
Write the balanced net ionic equation for the following dissolution reaction: Zn(OH)2 in aqueous NaOH
Th-232 has a half-life of 1.39 x 10^10 years old. A certain rock has a Pb-208/Th-232 mass ratio of 0.25/1.00. Estimate the age of the rock.
The half-life of 137Ce is 30. years. If we have 150.000 g of 137Ce now, how many grams of Ce will remain in 150. years?
Calculate the molar solubility of Mg(OII)_2 in a solution with a pH of 12.8 (K_op of Mg(OH)^2 is 1.2 * 10^-11
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