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A 27 g sample of ammonium carbamate (NH4(NH2CO2)), was placed in an evacuated 0.25 L flask and kept at 25?C. At equilibrium, 16.4 mg of CO2 was present.NH4(NH2CO2)(s) ?? 2NH3(g) + CO2(g) .What is the value of Kc for the decomposition of ammonium carbamate into ammonia and carbon dioxide?
The hydrogen gas generated is collected over water at 25.0°C. The volume of the gas is 295 mL measured at 1.00 atm. Calculate the number of grams of sodium used in the reaction. (Vapor pressure of water at 25°C = 0.0313 atm.)
a) when 34.0g of NH3 reacts with 96.0g of O2 what is the partial pressure of NO in the sealed container?
If a student starts with 615g of Co(NO3)2 and obtains a 57.3% yield of CoS, what mass of CoS is isolated? Co(NO3)2 +K2S ---> CoS + 2KNO3
Calculate the pH of a 0.50 M aqueous solution of NH3. The Kb for NH3 is 1.8 x 10-5.
How many liters of NO(g) can be made from 17.57 L of O2(g) and 16.55 L of N2(g) at STP?
The polarogram for 20ml of solution that was 3.65*10^-3 in Cd2+ gave a wave for that ion with a diffusion current of 31.3µA . calculate the percentage in change in concentration of the solution
Draw the molecular orbital diagram for CO. Based on your diagram, why does CO always bond through the carbon and not the oxygen atom?
Solid sodium iodide is slowly added to a solution that is 0.0050 M Pb2+ and 0.0050 M Ag+. [Ksp (PbI2) = 1.4 × 10-8; Ksp (AgI) = 8.3 × 10-17] Calculate the Ag+ concentration when PbI2 just begins to precipitate.
0,245g of the carbonate was found to exactly neutralise 23,6cm3 of HCl with a concentration of 0,150 mol/dm3.
Thermodynamic Processes. a volume of 20 cu ft of air at pressure of 50 psig is heated and expanded to 30 cu ft and 40psig find the change in the energy of air in joules.
An empty volumetric flask, weighing 60.42 grams, weighed 309.60 grams when filled with water. After emptying the water and drying the flask
Would it be a good idea for a person to take a couple of aspirin tablets before attending a cocktail party? Explain your reasoning. This needs to be from a chemistry stand point.
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