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Problem- A 0.130-mole quantity of NiCl2 is added to a liter of 1.20 M NH3 solution. What is the concentration of Ni2 ions at equilibrium? Assume the formation constant* of Ni(NH3)62 is 5.5 x 10^8.
State your answer by means of three significant figures.
a compoud is known to contain only carbon, hydrogen and oxygen. If the complete combustion of a .150 g sample of this compoud produces
What would be the effect of increasing the temperature of a gas chromatography column during the analysis of a gasous mixture if isothermal chromatography is done
the most common buffer in mammalian tissue culture is aphosphate buffer. the three pkas of phosphoric acid are 2.167.21
What mass (in grams) of steam at 100°C must be mixed with 375 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 66.0°
Write the balanced complete ionic equations and net ionic equations for the reactions that occur when each of the following solutions are mixed. (NH4)3PO4(aq) and CaCl2(aq)
The activatoin energy for the diffusion of copper in silver is 193,000 J/mol. Calculate the diffusion coefficient at 1200 K (927 degrees C), given that D at 1000 K (727 degrees C) is 1.0 x 10^-14 m^2/s
of the metal ions we tested in the flame, sodium gave the brightest and most persistent color. Do you think that if a mixture of potassium and sodium were burned in a flame, the gross color of potassium could be detected in the presence of sodium
Draw a partial MO diagram between px-orbitals of silicon and the appropriate halide for trimethylfluorosilane and trimethyliodosilane.
Calcium supplements commonly contain calcium ions in the form of calium carbonate (CaCO3). If one calcium supplement weights 600. mg, how many moles of calcium are contained in each pill
When 25.0 mL of 0.400 M H2SO4 and 50.0 mL of 0.850 M H2SO4 are mixed, what is the molarity of sulfuric acid in the final solution?
if 32.5 grams of cao are dissolved in 212 grams of water what is the concentration of the solution in percent by
50.00ml of BiO3- is titrated with 26.43ml 0.02982M Fe2+. What is the molar concentration of BiO3-? How many mg of NaBiO3 were in the 50.00ml sample? [BiO3-] = _______________ M mNaBiO3 = _______________ mg
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