Calculate the work in units of kj for the gas expansion
A sample of an ideal gas at 15.0 atm and 10.0 L is allowed to expand against a constant external pressure of 2.00 atm at a constant temperature. Calculate the work in units of kJ for the gas expansion.
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The half-life of strontium-90, 90Sr, is 25 years. This means that half of any given quantity of 90Sr will disintegrate in 25 years.
Gasoline is composed of hydrocarbons. Which additive, ethanol or MTBE, is more compatible (similar) with gasoline? Why?
A solution is made from 96 g of a nonvolatile solute in 80.0 grams of water. The solution has a vapor pressure of .312 atm at 75°C. Calculate the molar mass of the nonvolatile solute. The vapor pressure of pure water at 75°C is 0.380 atm
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An ideal gas at temperature T0 is slowly com- pressed at constant pressure of 2 atm from a volume of 10 liters to a volume of 2 liters. Then the volume of the gas is held constant while heat is added, raising the gas tempera- ture back to T0. Calc
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How many energy levels are present in the 3s conduction band of a single crystal of sodium weighing 26.8 mg? How many electrons are present in this band?
A piece of metal weighing 5.10 grams at a temperature of48.6oC was placed in a calorimeter into 20.00 mL ofwater at 22.1oC, and the final equilibrium temperature was found to be 29.2oC. What is the specific heat of the metal?
A polypeptide is subject to the following degradative techniques resulting in polypeptide fragments with the indicated amino acid sequences.
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