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The molar enthalpy of fusion (Delta H0) of ammonia is5.650 kJ/mol, and the molar entropy of fusion (Delta S0)of ammonia is 28.900 J/mol K. Using this information, calculate the freezing point of ammonia. (You must answer in Kelvin.)
Give two reasons why cyclohexane adopts the chair conformation rather than a planar structure
A section of membrane with an aquaporin (AQP) has a water transport rate of about 3 billion water molecules per second (3 × 109 molecules·s-1).
The mass of a single copper atom is 1.06E-22 grams. How many copper atoms would there be in 318 milligrams of copper?
how much heat is released when 75.0 g of steam at 100.0°C is cooled to ice at -15.0°C? The enthalpy of vaporization of water is 40.67 kJ/mol
Calculate the ratio of dihydrogen phosphate to hydrogen phosphate in the blood at pH 7.4. The Ka = 6.3 x 10 -8 5. 2.
If the pressure during the reaction stays CONSTANT (but the volume can change, like in a piston or balloon), which of these reactions do work on the surroundings
The U.S. Environmental Protection Agency set a maximum contaminant level (MCL) for tetrachloroethylene (TCE, C2Cl4) in drinking water of 0.005 ppm (by mass).
What are the frequency and the energy of a photon of light at each of these wavelengths. What are the energies in kJ/mol
Cesium-131 is a short lived radioisotope (t 1/2 = 9.7 days) used to treat prostate cancer. How much therapeutic strength does a cesium-131 source lose over 45.0 days?
what is the steric number of nitrogen trifluoride, carbon tetrabromide, phosphorus pentiodide, sulfur hexachloride, and bromine trifluoride.
What mass of carbon dioxide (in ) is produced upon the complete combustion of 18.9 of propane (approximate contents of one 5-gallon tank). Assume that the density of the liquid propane in the tank is 0.621.
A gas has a mass of 0.305 g, volume of 25 ml at 2 ATM and 0 degrees Celsius. The gas consists of bromine and fluorine. What is the molecular weight and the chemical formula
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