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1. Which of the following statements about entropy is untrue?
a) The change in the entropy of the universe for a given process is a measure of the driving force behind that process.b) An increase in entropy explains why an endothermic process might be spontaneous.c) The entropy of a system always increasesd) Entropy is a measure of how energy is distributed amongst the particles of a system into different energy levels.
2. If a system consists of two subsystems, one with 5 microstates and one with 10 microstates, how many microstates are in the whole system?
3. The more steps taken in expanding an ideal gas, the more work gets done by the surroundings on the system. (True or False)
the atomic mass of chlorine is listed as 35.454 amu on the periodic table. it has two naturally occurring isotopes, Cl-35 and Cl-37. what are the approximate percentages of each?
2 NH3 + CH3OH → products . How much NH3 is needed to react exactly with 21 grams of CH3OH
69.7 grams of a solute with a molecular mass of 2790 grams are dissolved in enough water to make 1.00 dm(3) of solution at 20 degrees C. What is the osmotic pressure of the solution? express your answer in kPa
Moneybags was found dead on the floor of his study. Investigators found an open bottle of scotch on his desk, and a broken glass on the floor near his body
A sample of pure NO2 is heated to 388C at which temperature it partially dissociates according to the equation.
A 460 mL sample of oxygen (O2) was collected by displacement of water at 24 ? C under a total barometric pressure of 1095 torr. What mass of dry oxygen was collected? The vapor pressure of water at 24 ? C is 22 torr
how many grams of KOH are present in 32.5mL of a 6.42 M KOH solution
Calculate the molar solubility of AgCl in a 1.00L solution containing 10.0g of dissolved CaCl2. Compare the molar solubility of Mg(OH)2 in water and in a solution buffered at a pH of 9.0
Chlorine dioxide, ClO2, is a reddish yellow gas used in bleaching paper pulp. The average speed of a ClO2 molecule at 25 degrees Celsius is 306 m/s. What is the kinetic energy of a ClO2 molecule moving at this speed?
Heated and allowed to expand against a constant pressure of 1.20 atm until its volume reaches twenty eight Litres. Now determine Which of the given data is correct?
A patient needs 0.004g of a sulfa drug. There are 5.00mg tablets in stock. How many tablets should be given.
How much CH4, in grams, is needed to produce 50.0 grams of CHCl3?
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