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Calculate the change in internal energy of the following system: a balloon is cooled by removing 0.654 kJ of heat. It shrinks on cooling, and the atmosphere does 385 J of work on the balloon.
how many grams of HNO3 must be dissolved to make 25L of a solution that has a pH of 1.5
2.0 moles of a nonelectrolyte solute are added to 1.0 kg of an unknown solvent. The freezing point is depressed by 7.9 K. Calculate the molal freezing point constant (Kf?) for this solvent.
Estimate dissociation energy of HF using simpe additivity rule If given that d(H-H) and D(F-F) IN H 2 is 336kj/mol and F2 is 258 kj/mol
Potassium chloride is used in the kitchen as a salt substitute (in place of sodium chloride). Suppose you were planning to make ice cream but discovered too late that you were out of table salt for making the ice bath.
how many grams of K2SO4 would you need to prepare 1500g of 5.0% K2SO4 (m/m) solution?
A 1.80-L flask is filled with propane gas (C3H8), at 1.00 atm and -19.4°C. What is the mass of the propane in the flask.
What volume of N2O, collected over water, at a total pressure of 94kpa and 22 Celcius, can be produced from 2.6g of NH4NO3.
Find out the required pressure to compress 180 liters of N at 1.0 atm into a tank whose volume is 34 liters.
Mixtures of helium and oxygen are used in scuba diving tanks to help prevent the bends, which is a condition caused by nitrogen bubbles forming in the bloodstream.
Compute the % sodium carbonate (MM = 105.99 g/mol) in this sample.
What mass of C4H6 in grams is consumed in the reaction below when 39.8 grams O2 (g) are also consumed? C4H6 (g) + O2 (g) ' CO2 (g) + H2O (g) (not balanced)
An an isothermal process, the pressure on 1 mol of an ideal monatomic gas suddenly changes from 4.00 atm to 100.0 atm at 25°C. Calculate w
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