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A quantity of 2.00 × 10^2 mL of 0.862 M HCl is mixed with 2.00×10^2 mL of 0.431 M Ba(OH)2 in a constant-pressure calorimeter that has a heat capacity of 453 J/°C. The initial temperature of the HCl and Ba(OH)2 solutions is the same at 20.48°C. For the process H+(aq) + OH-(aq) H2O(l), the heat of neutralization is -56.2 kJ/mol. What is the final temperature of the mixed solution?
A 41 kg person drinks 280. g of milk, which has a "caloric" value of approximately 3.0 kJ/g. If only 18% of the energy in milk is converted to mechanical work,
If 1.00 g of Ca2+ dissolved in 420 mL of water reacts stoichiometrically according to the balanced equation in a reaction solution with a total volume of 1680 mL, what is the molarity (M) of Na+ produced?
A chemist prepares a sample of hydrogen bromide and finds that it occupies 258 mL at 60 degrees celsisus and 476 Torr. What volume would it occupy at 0 degrees celsisus at the same pressure? Answer in units of mL to 5 decimal places.
A gas occupying 28 mL at standard conditions is heated to 13?C while the pressure is reduced to 0.84119 atm. What is the new volume occupied by the gas.
a steel sphere has a radius of 1.58in. If this steel sphere has a density of 7.88g/cm3, what is the mass of the sphere in grams?
the third bulb has a volume of 30.0 mL and contains 4.96 atm of hydrogen. If the stopcocks (valves) that isolate all three bulbs are opened, what is the final pressure of the whole system in atm?
What is the oxidizing agent?
What is the final river temperature downstream? Assume that the density of the waste stream is 1000 kg/m3.
What is the pH of a 0.16M solution of a lactic acid. HC3H5O3
The glass electrode used in commercial pH meters gives an electrical response proportional to the concentration of hydrogen ion. To convert these responses to a pH reading
Explain the difference between equivalence point and end point... Explain how the pH at the equivalence point varies as the strength of the acid increases.
The human body obtains 1091 kJ from a candy bar. If this energy were used to vaporize water at 100°C, how much water in liters could be vaporized? (Assume that the density of water is 1.0 g/mL.)
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