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The brown gas NO2 and the colorless gas N2O4 exist in equilibrium, 2NO2 <----> N2O4. In an experiment, 0.625 mole of N2O4 was introduced into a 5.00 L vessel and was allowed to decompose until equilibrium was reached. The concentration of N2O4 at equilibrium was 0.0750 M. Calculate Kc for the reaction.
CsCl crystallizes in a unit cell that contains the Cs+ ion at the center of a cube that has a Cl- at each corner. Each unit cell contains __________ Cs+ ions and __________ Cl-, ions, respectively.
A piece of copper alloy with a mass of 60.0 g is heated from 21.0 ?C to 44.0?C. In the process, it absorbs 507 J of energy as heat. What is the speci?c heat of this copper alloy.
The student ended up calculating that he/she has 2.19 ppm of Vitamin B2 in the diluted sample. Calculate the percent of the RDI of Riboflavin satisfied by consuming this tablet
How many grams of P2O5 gas are present in a 750 ml container that is at 75 degrees C and at a pressure of 590 mm Hg?
The empirical formula for hydride of silicon is SiH4, and it's central atom is silicon. Based on this information, you would expect the empirical
A solution of NH3 was prepared by diluting 8.29 mL of 27.62 wt% NH3 [density=0.89 g/mL] up to 564.0 mL. The molecular mass of NH3 is 17.0305 g/mol. Find the concentration of NH3 in M.
Dissolving NH4NO3 in water is an endothermic process. In fact, this reaction is often used in cold packs sold at the drug store. When 23.8 g of NH4NO3 was rapidly dissolved in 79.5 mL of water in a coffee cup calorimeter,
Uranium hexafluoride is a solid at room temperature, but it boils at 56°C. Determine the density of uranium hexafluoride at 62°C at 755 torr.
Calculate the change in chemical potential of an ideal gas when its pressure is increased isothermally from 1.8 atm to 29.5 atm at 40 C.
A first-order reaction has a rate constant of 0.33 y-1. How many years does it take for the concentration of the reactant to decrease from 0.13 M to 0.088 M?
When 7 mL of a solution containing 3 M KNO3 is diluted to 21mL, a dilute solution is formed. What is the NO3- concentration in 10mL of the dilute solution?
Cyclohexanol produces cyclohexene when heated to 70C in the presence of a sulfuric acid catalyst. Write the equation of the reaction.
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