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determine the molarity of each of the ions present inthe following aqueous salt solutions: (assume 100% ionization)
a) 1.25M CuBr2b) 0.75M NaHCO3c) 3.50M K3AsO4d) 0.65M (NH4)2SO4
Molten carbonate fuel cells fueled with H2 convert as much as 60% of the free energy relased by the formation of water from H2 and O2 into eletrical energy
A 250.0-mL sample of ammonia, NH3(g), exerts a pressure of 833 torr at 42.4 C. What mass of ammonia is in the container?
If 24 mL of 6.2 M H2SO4 was spilled, what is the minimum mass of NaHCO3 that must be added to the spill to neutralize the acid?
How many moles of oxygen will be produced if 27.6 grams of Al are produced?
Assuming that the loss of ability to recall Chem 401 material is a first-order process with a half-life of 55 days for the traditional (talking head lecture) and a C of 305 days for the active approach,
Calculate the approximate molecular mass of an unknown protein which had an elution volume of 9.0mL on the column.
Calculate the molar enthalpy change when mercury is cooled 10 K. The molar heat capacity of mercury is 27.8 J/K*mol
Imagine that you model your lungs as a 5 L sealed balloon at sea level: Estimate the volume of your lungs at 100 m below the sea level.
The following reaction takes place in a sealed 40.0-L container at a temp of 120 degrees C 4NH 3(G) + 5 O2 (g) --> 4NO (g) + 6H2O (G)
Addition of HBr to 1-phenylpropene yield only (1-bromopropyl)benzene. Propose a mechanism for the reaction and explain using resonance structures why none of the other regioisomer is produced?
C3H8 + 5O2 reacts to yield 3CO2 + 4H2O +488 kJ What is the heat released if 2.5 moles of C3H8 reacts completely with oxygen?
if 525 g of NaOH are dissolved to a final total of 50.0L what is the molarity of the solution
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