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A 4.50-g sample of LiCl at 25.0 C dissolves in 25.0 mL of water also at 25 C. The final equilibrium temperature of the resulting solution is 60.8 C. What is the enthalpy, delta H, of LiCl expressed in kilojoules per mole?
Determine the Osmotic Pressure for the following aqueous solutions @ 25 degrees Celsius. (a.) 1.0. M Glucose, and (b.)1.0 M NaCl. Explain which solution has the greater osmotic pressure if any and why.
Write the reactions responsible for the LIQUID PHASE oxidation of S(IV) to S(VI), and show how the oxidation can lead to a decrease in pH of rain water.
When 25.0 mL of 0.750 M CdCl2 is mixed with 40.0 mL of 0.120 M (NH4)2S, CdS precipitates from the solution. How many moles of CdS is formed.
You have pure beta-D-glucopyranose of 100 grams nearly, it was dissolved in an ethanol/water combination with the intention to recrystallize the sugar. You get pure beta-D-glucopyranose crystals 60 grams back why this 40% loss was to happen.
Calculate the de Broglie wavelength of a 143g- baseball traveling at 90mph ?
10mL of 0.1M HNO2 (nitrous acid, ka=4.0x10^-4)is titrated with a .01M KOH solution. After 10mL of the KOH solution is added, what will be the pH in the titration flask?
A certain first-order reaction (products) has a rate constant of 6.90×10-3 s^{-1} at 45 C. How many minutes does it take for the concentration of the reactant, [A], to drop to 6.25% of the original concentration?
Determine the mass of sodium phosphate that yields 1.00 g of calcium phosphate precipitate.
a hydrate of calcuim chloride contains 49.3% water and has a formula weight of 219g/mol calculate the molecular formula of the hydrate
A block of metal has a width of 3.2 cm, a length of 17.1 cm, and height of 3.5 cm. Its mass is 1.2 kg. Calculate the density of the metal.
when 31g of phosphorus reacts with oxygen, 71g of an oxide phosphorus is the product. What mass of oxygen is needed to produce 13g of this product?
1.0 atm pressure of oxygen is 0.041g/L. The solubility of oxygen in water at 3.0 atm and 25 C is _____ g/L.
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