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7.3 { mol} of helium are in a 18 { L} cylinder. The pressure gauge on the cylinder reads 67 {psi}. What are (a) the temperature of the gas in degrees Celsius and (b) the average kinetic energy of a helium atom in Joules?
The heat of vaporization of water =40.66 kJ/mol at 100 °C. Compute the quantity of heat that is absorbed/released when 9.00 grams of steam condenses to liquid water at the temperature of100 degree celsius.
A drug with the molecular formula C25H38O5 has 2.14 x 10^23 carbon atoms. What is the mass of the sample?
A saturated solution of lead(II) chloride, PbCl2 , was prepared by dissolving solid in water. The concentration of Pb2+ ion in the solution was found to be 1.62x10^-2 M. Calculate for Ksp for PbCl2.
the water solubility of L-alanine is 127g/L at 25 degrees celsius, what is the water solubility of D-alanine at 25 degrees celsius?
Phosphorus-32 is used in the form of Na2HPO4 in the treatment of chronic myeloid leukemia, among other things. (a) The isotope decays by beta-particle emission. Write a balanced equation for this process.
What is the major organic product that results when 1-tert-butylcyclopentanol is treated with concentrated sulfuric acid and heat
suppose that ethanol of 130 g at the normal temperature of 25 degrees celsius is combined with ethanol of 250 g at 81
Assuming no loss of water and a heat capacity for the vessel of 10.0 J/C, what is the final temperature of the system ( C of copper = 0.387J/gC) ? What is the final temperature?
A gas bottle contains .65 mol of gas at 730 Hg pressure. If the final pressure is 1.15 atm, how many moles of gas were added to the bottle?
What is the barium ion concentration in a saturated barium fluoride solution made by adding solid BaF2 until no more dissolved
How many moles of NaCl2 can be formed in the reaction of 5.00 mol of Ni and 10.0 mol of HCl
The Ksp of tin(II) hydroxide, Sn(OH)2, is 5.45 × 10-27. Calculate the solubility of this compound in g/L.
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