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A solution containing 16.9 of a nonvolatile molecular compound in 250 g water has a freezing point of -0.744...What is the molar mass of the substance?
Using Hess's Law to Calculate an Unknown heat ^ H Nitrogen oxides undergo many interesting reactions in the environment and in industry. Given the following information, calculate H for the overall equation
what amount of energy is required to completely ionize 6.2 grams of carbon atoms in the gas phase cg if the ionization
a gas occupies a volume of 458 mL at a pressure of 1.01kPa abd temperature of 295 K. When the pressure is changed, the colume becomes 477 mL. If there had been no change in temperature, what is the new pressure?
Molybdenum crystallizes in a body-centered cubic lattice (the Mo atoms are at the lattice points only). If the density of the metal is 10.3 g/cm3, what is the unit cell edge length in pm?
The electrons in the neutral carbon atom are redistributed so that there are three lone electrons in the three 2p orbitals and one lone electron in the 2s orbital.
The random walk model used to describe gas diffusion can be treated as a binomial distribution similar to coin flips with a 50/50 chance that a particle will move in either the +x direction or the -x direction.
How many moles of ammonia are produced when 20 moles of hydrogen react with 40 moles of nitrogen
A chemist dissolves 0.9 g of an unknown monoprotic (one acidic H) acid in water. She finds that 14.6 mL of 0.426 M NaOH are required to neutralize the acid.
Tallow is stored in a vertical tank 3 m in diameter and 9?m high. The tank is insulated with a 0.05?m layer of 85% magnesia. To prevent freezing, the tallow is maintained at a temperature of 50oC by condensing steam at 135.8 kPa (abs) in a heating..
450 mL of oxygen is bubbled through water at 10 degrees celsius and exerts 720.0 torr. What volume will the dry gas occupy at 730.0 torr and 10 degrees celcius?
Next calculate molar internal energy and molar heat capacity assuming vibrational energy levels are not significantly populated at 298 K and do not contribute to molar heat capacity and molar internal energy. Calculate percent error for each molar..
what is the molarity of all solutes in this solution. what is the osmotic pressure of the solution at 25 C. assume total dissociation of NaCL.
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