Final equilibrium temerpature of the resulting solution
A 4.50-g sample of LiCl at 25.0C dissovles in 25.0mL of water also at 25.0C. Th final equilibrium temerpature of the resulting solution is 60.8C. what is the enthalpy of solution, delta Hs, of LiCl expressed in kiljoules per mole?
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What is the denisty of a substance if a 1.50mL sample has a mass of 0.550g at room temperature? What is the specific gravity of the substance? Is the substance less dense or more dense than water?
Determine the number of representative particles in each substance:
The solubility product constant for MgF2 is 6.4 × 10-9. How many grams of MgF2 will dissolve in 150 mL of H2O at 25°C?
A gas sample containing 1.45 mol at 25°C exerts a pressure of 397 torr. Some gas is added to the same container, and the temperature is increased to 50.°C. If the pressure increases to 800. torr, how many moles of gas were added to the con
A metal sample weighing 71.9 g and at a temperature of 100.0°C was placed in 41.0 g of water in a calorimeter at 24.5°C. At equilibrium the temperature of the water and metal was 35.0 °C.
If the pressure increases to 800. torr, how many moles of gas were added to the container? Assume a constant-volume container.
A peanut butter sandwich provides about 1.6 103 kJ of energy. A typical adult uses about 95 kcal/hr of energy while sitting. If all of the energy in one peanut butter sandwich were to be burned off by sitting, how many hours would it be before thi
I1 = 589.5 kJ/mol, I2 =1145 kJ/mol, I3= 4900 kJ/mol, I4 = 6500 kJ/mol, and I5 = 8100 kJ/mol. Which one of these five elements is most consistent with this pattern of ionization energies?
What does it mean to say that the ions of an electrolyte behave independently of one another when the electrolyte is dissolved in water? Is it something about the compound splitting?
What is the pH at the half stoichiometric point, if you are doing a titration with 20.0 mL of 0.200 M trimethylamine and with 0.100M hydrochloric acid? pkb=4.19
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