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consider the following reaction, equilibrium concentrations and equilibrium constant at a particular temperature. determine the equilibrium concentration of NO2 (g)N2O4 (g) --><-- 2NO2 Kc = 0.21
[N2O4}]eq = .033M
a. 1.44Mb. 8.3 x 10^-2Mc. 12 x 10^-2Md. 6.9 x 10^-3Me. 144M
If a 1.7 reaction vessel initially contains 730 of at 25 , what partial pressure of will be present in the vessel after 200 minutes?
What's the volume of pure hydrogen present in a sample of 55.0 mL of gas saturated with water vapour at 27 °C, if the total pressure is 104.8 kPa?
Calculate molarity of solution obtained by dissolving 0.212g of Na2CO3 in 250cm3 of solution?
osmium has a density of 22.6 g/cm3. what volume (in mL) would be occupied by a 21.8 g sample of osmium?
Referring to the standard enthalpies of formation, why would silver not dissolve in hydrochloric acid?
The enthalpy change for melting ice at 0°C and constant atmospheric pressure is 6.01 kJ/mol. Calculate the quantity of energy required to melt a moderately large iceberg with a mass of 1.39 million metric tons. (A metric ton is 1000 kg.)
Indicate whether HC4H7O2 behaves as an acid or a base, and support your choice with a brief explanation.
A stock solution of perchloric acid is 70.5% by mass HClO4 and 29.5% by mass water. The density of the solution is 1.67 g·mL-1 at 20 C. Calculate the molarity of the solution.
the temperature of a 4.00L sample of gas is changed from 10.0c to 20.0c. what will the volume of this gas be at the new temperature if the pressure is held constant?
Calculate the mass in grams for a sample of aluminum that absorbs 1.85 when its temperature rises from 65 to 178.
Explain Buffer Solution and Henderson-Hasselbalch H-H, What is the pH of a solution prepared by mixing 50.00mL of 0.10 M NH3 with 25.00mL of 0.10 M NH4Cl? Assume that the volume of the solutions are additive and that Kb= 1.8 x 10 -5 for NH3.
A solution of phosphoric acid was made by dissolving 10 g of H3PO4 in 100 ml of water. The resulting volume was 104 mL. Calculate the density, mole fraction, molarity, and molality of the solution. Assume water has a density of 1.00 g/cm3
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