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Compute the change in internal energy (E) for a system that is giving off 25.0 kJ of heat also is changing from 12.00 L to 6.00 L in volume at 1.50 atm pressure. Remember that 101.3 J = 1 L•/sup>atm
We would like to make a buffer solution with a target pH of 8.44 (ignore activity). Suggest 3 conjugate acid/base pairs that could be used to make such a buffer.
What is the total pressure of a mixture of the following gases. Oxygen with a partial pressure of 221 mmHg, nitrogen with a partial pressure of 467 mmHg, and helium with a partial pressure of 29 mmHg
Wpump = 1500 kJ/h = 0.42 kW Qboil = 2.59 x 106 kJ/h = 718.7 kW Wturb = -227,300 kJ/h = -63.1 kW Qcond = -2.36 x 106 kJ/h = -656 kW What is the efficiency of the engine? How should we define it?
Equal mass samples of three liquids, A, B and C are obtained. The initial temperatures are 14 C, 24 C, and 40 C for liquids A, B, and C, respectively. If liquids A and V are mixed, the final temperature is 20 C and if liquids V and C are mixed, th..
How many grams of NaOH are needed to neutralize 20.0 mL of 0.150 M H2SO4 solution? (b) How many liters of 0.500 M HCl(aq) are needed to react completely with 0.100 mol of Pb(NO3)2(aq)
Phosphoric acid is produced by the reaction of calcium phosphate, Ca_3(PO_4)_2, with sulfuric acid. How much phosphoric acid can one make from exactly one U.S. ton (2000 lbs) of calcium phosphate
A 2.000-L flask was filled with 0.0393 mol SO2 and 0.0197 mol O2. At equilibrium at 907 K, the flask contained 0.0299 mol SO3. How many moles of each substance were in the flask at equilibrium
A current of 3.65 A is passed through a Fe(NO3)2 solution for 1.40 hours. How much iron is plated out of the solution
The density of a liquid sulfur compound is 1.14 gmL1. This compound contains 23.7% sulfur. How many milliliters of the compound must be burned to obtain 6.40 g of SO2?
A 8.90g sample of lead nitrate was heated in an open container to cause decomposition. Calculate the theoretical yield of PbO in grams.
What is the approximate K+ ion concentration in a 0.75 M K2SO4 solution? A) 0.375 M B) 0.75 M C) 1.25 M D) 1.50 M E) 2.25 M
A sample of pure NO2 is heated to 336 C at which temperature it partially dissociates according to the equation2NO2->O2+2NO
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