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A sample of 1.00 mol of a perfect monatomic gas with a molar heat capacity at constant volume of 3/2R initially at 298K and 10 L is expanded with the surroundings maintained at 298K, to a final volume of 20 L in three ways: a) isothermally and reversibly b) isothermally against a constant external pressure 0.50 atm c) adiabatically against a constant external pressure of 0.50 atm. Calculate /delta S, /delta H and /delta T for each path where the data permits.
What is the pH of a solution which results from mixing 150 mL of 0.50M acetic acid and 150 mL of 0.50M sodium hydroxide at 25oC?
At a distance of 41 ft an ionizing radiation source delivers 4.5 rem of radiation. How close could you get to the source and still have no biological effects?
The combustion of ethene, C2H4 , occurs via the reaction C2H4 (g) + 3O2(g) ===> 2CO2(g) + 2H2O(g) with heat of formation values given by the following table
A 100.0ml sample of 0.100M methylamine(CH3NH2, kb=3.7x10-4) is titrated with 0.250M HNO3. Calculate the pH after the addition of each of the following volumes of acid. a) 0.0 ml b) 20.0 ml c) 40.0 ml d)60.0 ml
Use the molar volume of a gas at STP to determine the volume (in L) occupied by 10.5 g of neon at STP.
State whether each of the following is a physical or a chemical property of copper. has good corrosion resistance high melting point doesn't react with water reacts with oxygen
calculate the final volume. A volume of 3.55 L of oxygen at 25 °C and 95 kPa is brought back to normal conditions (STP).
A 6.50 x 10^-5 M solution of potassium permanganate has a percent transmittance of 27.3% when measured in a 1.15-cm cell at a wavelength of 525 nm.
What volume in liters of 0.94 M KOH solution should be added to a 0.090 L solution containing 9.1 g of glutamic acid hydrochloride
Beginning with propanol as the only organic compound (expcept solvents) available,
A solution is prepared by dissolving 0.11 mol of acetic acid and 0.11 mol of ammonium chloride in enough water to make 1.0 L of solution. Find the concentration of ammonia in the solution.
A ruby laser produces radiation of wavelength 633 nm in pulses with a duration of 1.00*10^-9s. If the laser produces 0.475 J of energy per pulse, how many photons are produced in each pulse?
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