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Under constant pressure conditions a sample of hydrogen gas initially at 13 degrees C and 8.0 L is cooled until its final volume is 1.7L. What is its final temperature?
For the reaction given below, how many grams of Na2CS3 are produced in the reaction of 65.0 mL of liquid CS2 (d = 1.26 g/mL) and 1.56 mol NaOH
what are the concentrations of the significant ionic species of a 0.100M solution of lysine at pH=4
A beaker with 130 mL of an acetic acid buffer with a pH of 5.00 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 7.20 mL of a 0.370 M HCl solution to the beaker. How much will the pH..
What is the animal's initial radiation exposure in Curies. If all of the energy from the emitted alpha particles is absorbed by the animal's tissues, and if the energy of each emission is 7.77*10-12
Assuming no heat loss by the system, what will be the final temperature when 84 g of water at 10.0oC are mixed with 67 g of water at 50.0oC
When 2.42g of a nonelectrolyte solute is dissolved in 855 mL of water at 21 degree C, the resulting solution exerts an osmotic pressure of 829 torr. What is the molar concentration (M) of the solution
Calculate the concentration of HC2H3O2 or NH3 in each of the solutions you measured. By how many units did the pH of a solution of a weak base or acid
a separatory funnel is used in this method of separating liquids . f. liquid is allowed to evaporate, leaving the solid behind c. element
What molar ratio of sodium acetate to acetic acid should be used to prepare a buffer with pH = 4.5? Ka acetic acid = 1.8 x 10-5.
Malonic acid is a diprotic acid used in the production of pharmaceuticals. A 0.6561 g sample of a m ixture of malonic acid (C3H4O4) and NaCl was titrated to the equivalence point with NaOH. The titration required 54.94 mL of 0.1009 M NaOH. Malonic..
For any gas, the voulme the gas occupies is directly proportional to the number of moles of gas at a given temperature and pressure. Air is 21.0% (by volume) O2 How many moles of oxygen are present in 10.0 moles of air
The normal boiling point for acetone is 56.6 degrees Celsius. At an elevation of 5300 ft the atmospheric pressure is 630 torr. What would be the boiling point of acetone (enthalpy of vaporization=32.0 kj/mol) at this elevation? What would be the v..
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